DISCOVER CARD MASTER TRUST I
424B3, 1999-05-17
ASSET-BACKED SECURITIES
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<PAGE>   1
PROSPECTUS SUPPLEMENT                          This Prospectus Supplement, filed
FOR THE PERIOD ENDING                          pursuant to Rule 424(b)(3),
APRIL 30, 1999 TO                              relates to Registration Statement
PROSPECTUS DATED                               33-54804-01 and the Prospectus
OCTOBER 19, 1993                               dated October 19, 1993

                       SECURITIES AND EXCHANGE COMMISSION
                             450 Fifth Street, N.W.
                             Washington, D. C. 20549

                                    FORM 8-K

                                 CURRENT REPORT

                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934

         Date of Report (Date of earliest event reported): May 17, 1999

                          DISCOVER CARD MASTER TRUST I
                          ----------------------------
             (Exact name of registrant as specified in its charter)

Delaware                            0-23108                  Not Applicable
- --------                            -------                  --------------
(State of                           (Commission              (IRS Employer
organization)                       File Number)             Identification No.)

c/o Greenwood Trust Company
12 Read's way
New Castle, Delaware                                                   19720
- -------------------------------------------------------------------------------
(Address of principal executive offices)                             (Zip Code)

Registrant's telephone number, including area code: (302) 323-7184

                                 Not Applicable
                 ----------------------------------------------
                 (Former address, if changed since last report)

                                  Page 1 of 171
                         Index to Exhibits is on page 8


<PAGE>   2


Item 5. Other Events

A) Series 1993-1:
On May 17, 1999 the Registrant made available the Monthly Certificateholders'
Statement for the April 1999 Due Period with respect to Series 1993-1, which is
attached as Exhibit 20(a) hereto. May 17, 1999 is also the date on which holders
of Class B Certificates received final payment of principal and interest
(holders of the Class A Certificates received final payment of principal and
interest on April 15, 1999). Accordingly, Series 1993-1 terminated after the
final payment on May 17, 1999 and no further Monthly Certificateholders'
Statements will be forwarded to Investor Certificateholders of this Series.

B) Series 1993-2:
On May 17,1999 the Registrant made available the Monthly Certificateholders'
Statement for the April 1999 Due Period with respect to Series 1993-2, which is
attached as Exhibit 20(b) hereto. May 17, 1999 is also the date on which holders
of Class A Certificates received final payment of principal and interest.
Accordingly, no further Monthly Certificateholders' Statements will be forwarded
to Class A Certificateholders.

C) Series 1993-3:
On May 17, 1999 the Registrant made available the Monthly Certificateholders'
Statement for the April 1999 Due Period with respect to Series 1993-3, which is
attached as Exhibit 20(c) hereto.

D) Series 1994-2:
On May 17, 1999 the Registrant made available the Monthly Certificateholders'
Statement for the April 1999 Due Period with respect to Series 1994-2, which is
attached as Exhibit 20(d) hereto.

E) Series 1994-3:
On May 17, 1999 the Registrant made available the Monthly Certificateholders'
Statement for the April 1999 Due Period with respect to Series 1994-3, which is
attached as Exhibit 20(e) hereto.

F) Series 1994-A:
On May 17, 1999 the Registrant made available the Monthly Certificateholders'
Statement for the April 1999 Due Period with respect to Series 1994-A, which is
attached as Exhibit 20(f) hereto.

G) Series 1995-1:
On May 17, 1999 the Registrant made available the Monthly Certificateholders'
Statement for the April 1999 Due Period with respect to Series 1995-1, which is
attached as Exhibit 20(g) hereto.

H) Series 1995-2:
On May 17, 1999 the Registrant made available the Monthly Certificateholders'
Statement for the April 1999 Due Period with respect to Series 1995-2, which is
attached as Exhibit 20(h) hereto.


                                       2
<PAGE>   3


I) Series 1995-3:
On May 17, 1999 the Registrant made available the Monthly Certificateholders'
Statement for the April 1999 Due Period with respect to Series 1995-3, which is
attached as Exhibit 20(i) hereto.

J) Series 1996-1:
On May 17, 1999 the Registrant made available the Monthly Certificateholders'
Statement for the April 1999 Due Period with respect to Series 1996-1, which is
attached as Exhibit 20(j) hereto.

K) Series 1996-2:
On May 17, 1999 the Registrant made available the Monthly Certificateholders'
Statement for the April 1999 Due Period with respect to Series 1996-2, which is
attached as Exhibit 20(k) hereto.

L) Series 1996-3:
On May 17, 1999 the Registrant made available the Monthly Certificateholders'
Statement for the April 1999 Due Period with respect to Series 1996-3, which is
attached as Exhibit 20(l) hereto.

M) Series 1996-4:
On May 17, 1999 the Registrant made available the Monthly Certificateholders'
Statement for the April 1999 Due Period with respect to Series 1996-4, which is
attached as Exhibit 20(m) hereto.

N) Series 1997-1:
On May 17, 1999 the Registrant made available the Monthly Certificateholders'
Statement for the April 1999 Due Period with respect to Series 1997-1, which is
attached as Exhibit 20(n) hereto.

O) Series 1997-2:
On May 17, 1999 the Registrant made available the Monthly Certificateholders'
Statement for the April 1999 Due Period with respect to Series 1997-2, which is
attached as Exhibit 20(o) hereto.

P) Series 1997-3:
On May 17, 1999 the Registrant made available the Monthly Certificateholders'
Statement for the April 1999 Due Period with respect to Series 1997-3, which is
attached as Exhibit 20(p) hereto.

Q) Series 1997-4:
On May 17, 1999 the Registrant made available the Monthly Certificateholders'
Statement for the April 1999 Due Period with respect to Series 1997-4, which is
attached as Exhibit 20(q) hereto.

R) Series 1998-1:
On May 17, 1999 the Registrant made available the Monthly Certificateholders'
Statement for the April 1999 Due Period with respect to Series 1998-1, which is
attached as Exhibit 20(r) hereto.


                                       3
<PAGE>   4


S) Series 1998-2:
On May 17, 1999 the Registrant made available the Monthly Certificateholders'
Statement for the April 1999 Due Period with respect to Series 1998-2, which is
attached as Exhibit 20(s) hereto.

T) Series 1998-3:
On May 17, 1999 the Registrant made available the Monthly Certificateholders'
Statement for the April 1999 Due Period with respect to Series 1998-3, which is
attached as Exhibit 20(t) hereto.

U) Series 1998-4:
On May 17, 1999 the Registrant made available the Monthly Certificateholders'
Statement for the April 1999 Due Period with respect to Series 1998-4, which is
attached as Exhibit 20(u) hereto.

V) Series 1998-6:
On May 17, 1999 the Registrant made available the Monthly Certificateholders'
Statement for the April 1999 Due Period with respect to Series 1998-6, which is
attached as Exhibit 20(v) hereto.

W) Series 1998-7:
On May 17, 1999 the Registrant made available the Monthly Certificateholders'
Statement for the April 1999 Due Period with respect to Series 1998-7, which is
attached as Exhibit 20(w) hereto.

X) Series 1999-1:
On May 17, 1999 the Registrant made available the Monthly Certificateholders'
Statement for the April 1999 Due Period with respect to Series 1999-1, which is
attached as Exhibit 20(x) hereto.

Y) Series 1999-2:
On May 17, 1999 the Registrant made available the Monthly Certificateholders'
Statement for the April 1999 Due Period with respect to Series 1999-2, which is
attached as Exhibit 20(y) hereto.

Z) Series 1999-3:
On May 17, 1999 the Registrant made available the Monthly Certificateholders'
Statement for the April 1999 Due Period with respect to Series 1999-3, which is
attached as Exhibit 20(z) hereto.

AA) Series 1999-4:
On May 17, 1999 the Registrant made available the Monthly Certificateholders'
Statement for the April 1999 Due Period with respect to Series 1999-4, which is
attached as Exhibit 20(aa) hereto.


                                       4
<PAGE>   5


Item 7. Financial Statements and Exhibits

c)    Exhibits

<TABLE>
<CAPTION>
Exhibit No.                         Description
- -----------                         -----------
<S>                                 <C>
20(a)                               Monthly Certificateholders' Statement, related to the Due Period ending
                                    April 30, 1999, for Series 1993-1 that accompanied the final distribution
                                    of principal and interest on May 17, 1999.

20(b)                               Monthly Certificateholders' Statement, related to the Due Period ending
                                    April 30, 1999, for Series 1993-2.

20(c)                               Monthly Certificateholders' Statement, related to the Due Period ending
                                    April 30, 1999, for Series 1993-3.

20(d)                               Monthly Certificateholders' Statement, related to the Due Period ending
                                    April 30, 1999, for Series 1994-2.

20(e)                               Monthly Certificateholders' Statement, related to the Due Period ending
                                    April 30, 1999, for Series 1994-3.

20(f)                               Monthly Certificateholders' Statement, related to the Due Period ending
                                    April 30, 1999, for Series 1994-A.

20(g)                               Monthly Certificateholders' Statement, related to the Due Period ending
                                    April 30, 1999, for Series 1995-1.

20(h)                               Monthly Certificateholders' Statement, related to the Due Period ending
                                    April 30, 1999, for Series 1995-2.

20(i)                               Monthly Certificateholders' Statement, related to the Due Period ending
                                    April 30, 1999, for Series 1995-3.

20(j)                               Monthly Certificateholders' Statement, related to the Due Period ending
                                    April 30, 1999, for Series 1996-1.

20(k)                               Monthly Certificateholders' Statement, related to the Due Period ending
                                    April 30, 1999, for Series 1996-2.

20(l)                               Monthly Certificateholders' Statement, related to the Due Period ending
                                    April 30, 1999, for Series 1996-3.

20(m)                               Monthly Certificateholders' Statement, related to the Due Period ending
                                    April 30, 1999, for Series 1996-4.

20(n)                               Monthly Certificateholders' Statement, related to the Due Period ending
                                    April 30, 1999, for Series 1997-1.
</TABLE>


                                       5
<PAGE>   6


<TABLE>
<S>                                 <C>
20(o)                               Monthly Certificateholders' Statement, related to the Due Period ending
                                    April 30, 1999, for Series 1997-2.

20(p)                               Monthly Certificateholders' Statement, related to the Due Period ending
                                    April 30, 1999, for Series 1997-3.

20(q)                               Monthly Certificateholders' Statement, related to the Due Period ending 
                                    April 30, 1999, for Series 1997-4.

20(r)                               Monthly Certificateholders' Statement, related to the Due Period ending
                                    April 30, 1999, for Series 1998-1.

20(s)                               Monthly Certificateholders' Statement, related to the Due Period ending
                                    April 30, 1999, for Series 1998-2.

20(t)                               Monthly Certificateholders' Statement, related to the Due Period ending
                                    April 30, 1999, for Series 1998-3.

20(u)                               Monthly Certificateholders' Statement, related to the Due Period ending
                                    April 30, 1999, for Series 1998-4.

20(v)                               Monthly Certificateholders' Statement, related to the Due Period ending
                                    April 30, 1999, for Series 1998-6.

20(w)                               Monthly Certificateholders' Statement, related to the Due Period ending
                                    April 30, 1999, for Series 1998-7.

20(x)                               Monthly Certificateholders' Statement, related to the Due Period ending
                                    April 30, 1999, for Series 1999-1.

20(y)                               Monthly Certificateholders' Statement, related to the Due Period ending
                                    April 30, 1999, for Series 1999-2.

20(z)                               Monthly Certificateholders' Statement, related to the Due Period ending
                                    April 30, 1999, for Series 1999-3.

20(aa)                              Monthly Certificateholders' Statement, related to the Due Period ending
                                    April 30, 1999, for Series 1999-4.
</TABLE>


                                       6
<PAGE>   7


                                   SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange
Act of 1934, the registrant has duly caused this report to be signed on its
behalf by the undersigned, thereunto duly authorized.

                                        DISCOVER CARD MASTER TRUST I
                                                 (Registrant)

                                        By: GREENWOOD TRUST COMPANY
                                            as originator of the Trust

                                        By: John J. Coane
                                            ------------------------------------
                                            John J. Coane
                                            Vice President, Chief Accounting
                                            Officer and Treasurer

Date: May 17, 1999


                                       7
<PAGE>   8


                                  EXHIBIT INDEX

<TABLE>
<CAPTION>
Exhibit No.                                 Description
- -----------                                 -----------
<S>                                         <C>
20(a)                                       Monthly Certificateholders' Statement, related to the Due Period
                                            ending April 30, 1999, for Series 1993-1.

20(b)                                       Monthly Certificateholders' Statement, related to the Due Period
                                            ending April 30, 1999, for Series 1993-2.

20(c)                                       Monthly Certificateholders' Statement, related to the Due Period
                                            ending April 30, 1999, for Series 1993-3.

20(d)                                       Monthly Certificateholders' Statement, related to the Due Period
                                            ending April 30, 1999, for Series 1994-2.

20(e)                                       Monthly Certificateholders' Statement, related to the Due Period
                                            ending April 30, 1999, for Series 1994-3.

20(f)                                       Monthly Certificateholders' Statement, related to the Due Period
                                            ending April 30, 1999, for Series 1994-A.

20(g)                                       Monthly Certificateholders' Statement, related to the Due Period
                                            ending April 30, 1999, for Series 1995-1.

20(h)                                       Monthly Certificateholders' Statement, related to the Due Period
                                            ending April 30, 1999, for Series 1995-2.

20(i)                                       Monthly Certificateholders' Statement, related to the Due Period
                                            ending April 30, 1999, for Series 1995-3.

20(j)                                       Monthly Certificateholders' Statement, related to the Due Period
                                            ending April 30, 1999, for Series 1996-1.

20(k)                                       Monthly Certificateholders' Statement, related to the Due Period
                                            ending April 30, 1999, for Series 1996-2.

20(l)                                       Monthly Certificateholders' Statement, related to the Due Period
                                            ending April 30, 1999, for Series 1996-3.

20(m)                                       Monthly Certificateholders' Statement, related to the Due Period
                                            ending April 30, 1999, for Series 1996-4.

20(n)                                       Monthly Certificateholders' Statement, related to the Due Period
                                            ending April 30, 1999, for Series 1997-1.

20(o)                                       Monthly Certificateholders' Statement, related to the Due Period
                                            ending April 30, 1999, for Series 1997-2.
</TABLE>


                                       8
<PAGE>   9


<TABLE>
<S>                                         <C>
20(p)                                       Monthly Certificateholders' Statement, related to the Due Period
                                            ending April 30, 1999, for Series 1997-3.

20(q)                                       Monthly Certificateholders' Statement, related to the Due Period
                                            ending April 30, 1999, for Series 1997-4.

20(r)                                       Monthly Certificateholders' Statement, related to the Due Period
                                            ending April 30, 1999, for Series 1998-1.

20(s)                                       Monthly Certificateholders' Statement, related to the Due Period
                                            ending April 30, 1999, for Series 1998-2.

20(t)                                       Monthly Certificateholders' Statement, related to the Due Period
                                            ending April 30, 1999, for Series 1998-3.

20(u)                                       Monthly Certificateholders' Statement, related to the Due Period
                                            ending April 30, 1999, for Series 1998-4.

20(v)                                       Monthly Certificateholders' Statement, related to the Due Period
                                            ending April 30, 1999, for Series 1998-6.

20(w)                                       Monthly Certificateholders' Statement, related to the Due Period
                                            ending April 30, 1999, for Series 1998-7.

20(x)                                       Monthly Certificateholders' Statement, related to the Due Period
                                            ending April 30, 1999, for Series 1999-1.

20(y)                                       Monthly Certificateholders' Statement, related to the Due Period
                                            ending April 30, 1999, for Series 1999-2.

20(z)                                       Monthly Certificateholders' Statement, related to the Due Period
                                            ending April 30, 1999, for Series 1999-3.

20(aa)                                      Monthly Certificateholders' Statement, related to the Due Period
                                            ending April 30, 1999, for Series 1999-4.
</TABLE>


                                       9

<PAGE>   1
                                                                     EXHIBIT (A)

                    MONTHLY CERTIFICATEHOLDERS' STATEMENT
                        Discover Card Master Trust I
                       Series 1993-1 Monthly Statement
                   Class A Certificate CUSIP #25466KAA7
                   Class B Certificate CUSIP #25466KAB5


Trust Distribution Date: May 17, 1999         Due Period Ending:  April 30, 1999

Pursuant to the Series Supplement dated as of October 27, 1993 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<CAPTION>
1.   Payments for the benefit of Series Investors this Due Period (per $1000 of Class Initial Investor Interest)
     -----------------------------------------------------------------------------------------------------------

     Series  1993-1                                 Total           Interest        Principal
         <S>          <C>                      <C>                <C>            <C>
         Class B      30 days at 5.30000000%   $1,004.416666667   $4.416666667   $1,000.000000000
</TABLE>

<TABLE>
<CAPTION>
2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------
  <S>  <C>                                                <C>
  (a)  Aggregate Investor Interest                        $20,624,749,676.00

       Seller Interest                                     $5,632,195,899.94

       Total Master Trust                                 $26,256,945,575.94


  (b)  Group One Investor Interest                        $18,074,749,676.00

  (c)  Group Two Investor Interest                         $2,550,000,000.00

  (d)  Series 1993-1 Investor Interest                                 $0.00

  (e)  Class A Investor Interest                                       $0.00

       Class B Investor Interest                                       $0.00
</TABLE>

<TABLE>
<CAPTION>
3.   Allocation of Receivables Collected During the Due Period
     ---------------------------------------------------------

                                                                Finance Charge             Principal             Yield
                                                                  Collections             Collections         Collections
  <S>  <C>                                                                              <C>                   <C>
  (a)  Allocation of Collections between Investor and Seller

       Aggregate Investor Allocation                             $316,121,219.78        $3,022,278,825.29         $0.00

       Seller                                                     $84,742,614.59          $810,182,277.03         $0.00

  (b)  Group One Allocation                                      $277,252,259.81        $2,650,671,899.42         $0.00

  (c)  Group Two Allocation                                       $38,868,959.97          $371,606,925.87         $0.00

  (d)  Series 1993-1 Allocations                                     $729,572.18            $6,975,079.21         $0.00

  (e)  Class A Allocations                                                 $0.00                    $0.00         $0.00

       Class B Allocations                                           $729,572.18            $6,975,079.21         $0.00
</TABLE>


<PAGE>   2


<TABLE>
<CAPTION>
4.   Information Concerning the Series Principal Funding Accounts ("SPFA")
     ---------------------------------------------------------------------
                         Deposits into the
                          SPFAs This        SPFA    Deposit Deficit   Investment
                          Due Period       Balance    Amount           Income
     <S>                <C>                <C>         <C>            <C>
     Series 1993-1      $47,873,000.00      $0.00         0.00         $0.00
</TABLE>

<TABLE>
<CAPTION>
5.   Information Concerning Amount of Controlled Liquidation Payments
     ----------------------------------------------------------------
                                                                Total Payments
                           Amount Paid       Deficit Amount     Through This
                          This Due Period    This Due Period     Due Period
     <S>                  <C>                <C>               <C>
     Series 1993-1        $47,873,000.00            $0.00      $797,873,000.00
</TABLE>

<TABLE>
<CAPTION>
6.   Information Concerning the Series Interest Funding Accounts ("SIFA")
     --------------------------------------------------------------------
                                            Deposits Into the
                                              SIFAs This
                                              Due Period        SIFA Balance
     <S>                                     <C>                <C>
     Series 1993-1                           $211,439.08            $0.00
</TABLE>

<TABLE>
<CAPTION>
7.   Pool Factors
     ------------
                                                            This Due Period
     <S>                                                    <C>
     Class A                                                 0.00000000

     Class B                                                 0.00000000
</TABLE>

<TABLE>
<CAPTION>
8.   Investor Charged-Off Amount
     ---------------------------
                                                                  Cumulative
                                                              Investor Charged-Off
                                           This Due Period          Amount
  <S>  <C>                                 <C>                      <C>
  (a)  Group One                            $86,442,427.02            $0.00

  (b)  Group Two                            $12,118,664.92            $0.00

  (c)  Series 1993-1                           $227,467.90            $0.00

  (d)  Class A                                       $0.00            $0.00

       Class B                                 $227,467.90            $0.00
</TABLE>

<TABLE>
<CAPTION>
9.   Investor Losses This Due Period
     -------------------------------
                                                                 Per $1,000 of
                                                               Original Invested
                                                     Total        Principal
  <S>  <C>                                           <C>            <C>
  (a)  Group One                                     $0.00          $0.00

  (b)  Group Two                                     $0.00          $0.00

  (c)  Series 1993-1                                 $0.00          $0.00

  (d)  Class A                                       $0.00          $0.00

       Class B                                       $0.00          $0.00
</TABLE>


<PAGE>   3


<TABLE>
<CAPTION>
10.  Reimbursement of Investor Losses This Due Period
     ------------------------------------------------
                                                                Per $1,000 of
                                                              Original Invested
                                                     Total        Principal
  <S>                                                <C>            <C>
  (a) Group One                                      $0.00          $0.00

  (b) Group Two                                      $0.00          $0.00

  (c) Series 1993-1                                  $0.00          $0.00

  (d) Class A                                        $0.00          $0.00

      Class B                                        $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
11.  Aggregate Amount of Unreimbursed Investor Losses
     ------------------------------------------------
                                                                Per $1,000 of
                                                              Original Invested
                                                     Total        Principal
  <S>                                                <C>            <C>
  (a) Group One                                      $0.00          $0.00

  (b) Group Two                                      $0.00          $0.00

  (c) Series 1993-1                                  $0.00          $0.00

  (d) Class A                                        $0.00          $0.00

      Class B                                        $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
     -------------------------------------------------------------------
  <S>                                                       <C>
  (a) Group One                                             $30,315,482.22

  (b) Group Two                                              $4,250,000.00

  (c) Series 1993-1                                             $79,788.33

  (d) Class A                                                        $0.00

      Class B                                                   $79,788.33
</TABLE>

<TABLE>
<CAPTION>
13.  Class Available Subordinated Amount at the end of the Due Period
     ----------------------------------------------------------------
                                                              As a Percentage
                                                                of Class A
                                                      Total   Invested Amount
     <S>                                              <C>         <C>
     Series 1993-1 Class B                            $0.00       0.0000%
</TABLE>

<TABLE>
<CAPTION>
14.  Total Available Credit Enhancement Amounts
     ------------------------------------------

                                             Shared Amount  Class B Amount
     <S>                                          <C>              <C>
     Maximum Amount                                $0.00            $0.00

     Available Amount                              $0.00            $0.00

     Amount of Drawings on Credit Enhancement
       for this Due Period                         $0.00            $0.00
</TABLE>



<PAGE>   4


<TABLE>
<CAPTION>
15.  Delinquency Summary
     -------------------
     <S>                                                        <C>
     End of Due Period Master Trust Receivables Outstanding     $26,675,706,815.58
</TABLE>

<TABLE>
<CAPTION>
                         Delinquent Amount  Percentage of Ending
     Payment Status      Ending Balance     Receivables Outstanding
     <S>              <C>                       <C>
     30-59 days         $628,092,799.56          2.35%

     60-179 days      $1,127,022,100.37          4.22%
</TABLE>


                                 U.S. BANK NATIONAL ASSOCIATION
                                 as Trustee


                              BY:
                                  ----------------------------
                                        Vice President


<PAGE>   5


                     MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1993-1 Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

       The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of October 27, 1993 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1993-1 Master Trust Certificates for the Distribution Date
occurring on May 17, 1999:

<TABLE>
<S>                                                                                    <C>
1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

3.  The aggregate amount of Collections processed during the related Due
    Period is equal to                                                                 $4,233,324,936.71

4.  The aggregate amount of Class B Principal Collections processed during
    the related Due Period is equal to                                                     $6,975,079.21

5.  The aggregate amount of Class B Finance Charge Collections processed
    during the related Due Period is equal to                                                $729,572.18

6a. The aggregate amount of Class B Principal Collections recharacterized as
    Series Yield Collections during the related Due Period is equal to                             $0.00

6b. The aggregate amount of Class B Additional Funds for this Distribution
    date is equal to                                                                               $0.00

 7. The amount of drawings under the Credit Enhancement required to be
    made on the related Drawing Date pursuant to the Series Supplement:

    (a)  with respect to the Class B Required Amount Shortfall                                     $0.00
         is equal to

    (b)  with respect to the Class B Cumulative Investor Charged-Off                               $0.00
         Amount is equal to

    (c)  with respect to the Class B Investor Interest is equal to                                 $0.00

8.  The sum of all amounts payable to the Class B Certificateholders
    on the current Distribution Date is equal to                                          $48,084,439.08
</TABLE>


<PAGE>   6


9.  Attached hereto is a true copy of the statement required to be delivered by
    the Master Servicer on the date of this Certificate to the Trustee pursuant 
    to Section 16 of the Series Supplement.

       IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 17th day of May, 1999.



                               GREENWOOD TRUST COMPANY
                                 as Master Servicer

                               By:
                                  -----------------------------------
                               Vice President, Chief Accounting Officer,
                               and Treasurer


<PAGE>   1
                                                                     EXHIBIT (B)


                     MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                        Series 1993-2 Monthly Statement
                      Class A Certificate CUSIP #25466KAE9
                      Class B Certificate CUSIP #25466KAF6


Trust Distribution Date: May 17, 1999    Due Period Ending:  April 30, 1999

Pursuant to the Series Supplement dated as of December  1, 1993 relating to the
Pooling and Servicing Agreement dated as of October  1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust.  The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<CAPTION>
1.   Payments for the benefit of Series Investors this Due Period (per $1000 of Class Initial Investor Interest)
     ----------------------------------------------------------------------------------------------------------
     Series  1993-2                                    Total           Interest        Principal
         <S>          <C>                          <C>               <C>             <C>
         Class A      30 days at 5.400000000%      $83.708333287     $0.375000000    $83.333333288

         Class B      30 days at 5.750000000%       $4.791666667     $4.791666667     $0.000000000
</TABLE>

<TABLE>
<CAPTION>
2.     Principal Receivables at the end of the Due Period
       --------------------------------------------------
  <S>                                                      <C>
  (a)  Aggregate Investor Interest                        $20,624,749,676.00

       Seller Interest                                     $5,632,195,899.94

       Total Master Trust                                 $26,256,945,575.94


  (b)  Group One Investor Interest                        $18,074,749,676.00

  (c)  Group Two Investor Interest                         $2,550,000,000.00

  (d)  Series 1993-2 Investor Interest                        $33,334,000.00

  (e)  Class A Investor Interest                                       $0.00

        Class B Investor Interest                              $33,334,000.00
</TABLE>

<TABLE>
<CAPTION>
3.     Allocation of Receivables Collected During the Due Period
       ---------------------------------------------------------

                                                                    Finance Charge           Principal          Yield
                                                                     Collections            Collections       Collections
  <S>                                                              <C>                  <C>                      <C>
  (a)  Allocation of Collections between Investor and Seller

       Aggregate Investor Allocation                                $316,121,219.78       $3,022,278,825.29        $0.00

       Seller                                                        $84,742,614.59         $810,182,277.03        $0.00

  (b)  Group One Allocation                                         $277,252,259.81       $2,650,671,899.42        $0.00

  (c)  Group Two Allocation                                          $38,868,959.97         $371,606,925.87        $0.00

  (d)  Series 1993-2 Allocations                                      $1,524,485.16          $14,574,849.57        $0.00

  (e)  Class A Allocations                                            $1,016,189.82           $9,715,288.89        $0.00

       Class B Allocations                                              $508,295.34           $4,859,560.68        $0.00
</TABLE>



<PAGE>   2

<TABLE>
<CAPTION>
4.   Information Concerning the Series Principal Funding Accounts ("SPFA")
     ---------------------------------------------------------------------
                         Deposits into the
                          SPFAs This         SPFA    Deposit Deficit  Investment
                          Due Period        Balance    Amount          Income
     <S>                <C>                 <C>           <C>           <C>
     Series 1993-2      $66,666,666.63      $0.00         0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
5.   Information Concerning Amount of Controlled Liquidation Payments
     ----------------------------------------------------------------
                                                                Total Payments
                              Amount Paid     Deficit Amount    Through This
                             This Due Period  This Due Period    Due Period
     <S>                  <C>                        <C>      <C>
     Series 1993-2        $66,666,666.63             $0.00     $800,000,000.00
</TABLE>

<TABLE>
<CAPTION>
6.   Information Concerning the Series Interest Funding Accounts ("SIFA")
     --------------------------------------------------------------------
                                            Deposits Into the
                                              SIFAs This
                                              Due Period       SIFA Balance
     <S>                                     <C>                      <C>
     Series 1993-2                           $459,725.42             $0.00
</TABLE>

<TABLE>
<CAPTION>
7.   Pool Factors
     ------------
                                                            This Due Period
     <S>                                                     <C>
     Class A                                                 0.00000000

     Class B                                                 1.00000000
</TABLE>

<TABLE>
<CAPTION>
8.   Investor Charged-Off Amount
     ---------------------------
                                                                   Cumulative
                                                                Investor Charged-Off
                                              This Due Period       Amount
  <S>  <C>                                  <C>                          <C>
  (a)  Group One                            $86,442,427.02               $0.00

  (b)  Group Two                            $12,118,664.92               $0.00

  (c)  Series 1993-2                           $475,307.93               $0.00

  (d)  Class A                                 $316,830.29               $0.00

       Class B                                 $158,477.64               $0.00
</TABLE>

<TABLE>
<CAPTION>
9.   Investor Losses This Due Period
     -------------------------------
                                                                  Per $1,000 of
                                                                 Original Invested
                                                   Total           Principal
  <S>  <C>                                           <C>               <C>
  (a)  Group One                                     $0.00             $0.00

  (b)  Group Two                                     $0.00             $0.00

  (c)  Series 1993-2                                 $0.00             $0.00

  (d)  Class A                                       $0.00             $0.00

       Class B                                       $0.00             $0.00
</TABLE>



<PAGE>   3





<TABLE>
<CAPTION>
10.  Reimbursement of Investor Losses This Due Period        Per $1,000 of
     ------------------------------------------------       Original Invested
                                                 Total        Principal
  <S>  <C>                                         <C>            <C>
  (a)  Group One                                   $0.00          $0.00

  (b)  Group Two                                   $0.00          $0.00

  (c)  Series 1993-2                               $0.00          $0.00

  (d)  Class A                                     $0.00          $0.00

       Class B                                     $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
11.  Aggregate Amount of Unreimbursed Investor Losses        Per $1,000 of
     ------------------------------------------------       Original Invested
                                                 Total        Principal
  <S>  <C>                                         <C>            <C>
  (a)  Group One                                   $0.00          $0.00

  (b)  Group Two                                   $0.00          $0.00

  (c)  Series 1993-2                               $0.00          $0.00

  (d)  Class A                                     $0.00          $0.00

       Class B                                     $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
     -------------------------------------------------------------------
  <S>  <C>                                                <C>
  (a)  Group One                                          $30,315,482.22

  (b)  Group Two                                           $4,250,000.00

  (c)  Series 1993-2                                         $166,667.78

  (d)  Class A                                               $111,111.11

       Class B                                                $55,556.67
</TABLE>

<TABLE>
<CAPTION>
13.  Class Available Subordinated Amount at the end of the Due Period
     -----------------------------------------------------------------
                                                             As a Percentage
                                                               of Class A
                                                 Total       Invested Amount
     <S>                                              <C>       <C>
     Series 1993-2 Class B                            $0.00     0.0000%
</TABLE>

<TABLE>
<CAPTION>
14.  Total Available Credit Enhancement Amounts
     ------------------------------------------

                                                    Shared Amount  Class B Amount
     <S>                                         <C>              <C>
     Maximum Amount                              $16,666,680.00    $8,333,340.00

     Available Amount                            $16,666,680.00    $8,333,340.00

     Amount of Drawings on Credit Enhancement
       for this Due Period                                $0.00            $0.00
</TABLE>



<PAGE>   4





<TABLE>
<CAPTION>
15.  Delinquency Summary
     -------------------
     End of Due Period Master Trust Receivables Outstanding     $26,675,706,815.58

                         Delinquent Amount  Percentage of Ending
     Payment Status      Ending Balance     Receivables Outstanding
<S>                   <C>                       <C>
     30-59 days         $628,092,799.56          2.35%

     60-179 days      $1,127,022,100.37          4.22%
</TABLE>


                                 U.S. BANK NATIONAL ASSOCIATION
                                 as Trustee


                              BY:
                                  ----------------------------

                                        Vice President




<PAGE>   5
                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                        Series 1993-2 Monthly Statement

                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of December  1, 1993 (the "Series Supplement")
by and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1993-2 Master Trust Certificates for the Distribution Date
occurring on May 17, 1999:


<TABLE>
 <S>                                                                                                     <C>
 1.   Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.   The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.   The aggregate amount of Collections processed during the related Due
      Period is equal to                                                                                 $4,233,324,936.71

 4.   The aggregate amount of Class A Principal Collections processed during
      the related Due Period is equal to                                                                     $9,715,288.89

 5.   The aggregate amount of Class A Finance Charge Collections processed
      during the related Due Period is equal to                                                              $1,016,189.82

 6a.  The aggregate amount of Class A Principal Collections recharacterized as
      Series Yield Collections during the related Due Period is equal to                                             $0.00

 6b.  The aggregate amount of Class A Additional Funds for this Distribution
      date is equal to                                                                                               $0.00

  7.  The amount of drawings under the Credit Enhancement required to be
      made on the related Drawing Date pursuant to the Series Supplement:

      (a)   with respect to the Class A Required Amount Shortfall                                                    $0.00
            is equal to

      (b)   with respect to the Class A Cumulative Investor Charged-Off                                              $0.00
            Amount is equal to

      (c)   with respect to the Class A Investor Interest is equal to                                                $0.00

 8.   The sum of all amounts payable to the Class A Certificateholders
      on the current Distribution Date is equal to                                                          $66,966,666.63
</TABLE>


<PAGE>   6





<TABLE>
<S>                                                                                                          <C>
 9.   The aggregate amount of Class B Principal Collections processed during
      the related Due Period is equal to                                                                     $4,859,560.68

10.   The aggregate amount of Class B Finance Charge Collections processed
      during the related Due Period is equal to                                                                $508,295.34

11a.  The aggregate amount of Class B Principal Collections recharacterized as
      Series Yield Collections during the related Due Period is equal to                                             $0.00

11b.  The aggregate amount of Class B Additional Funds for this Distribution
      date is equal to                                                                                               $0.00

 12.  The amount of drawings under the Credit Enhancement required to be
      made on the related Drawing Date pursuant to the Series Supplement:

      (a)   with respect to the Class B Required Amount Shortfall                                                    $0.00
            is equal to

      (b)   with respect to the Class B Cumulative Investor Charged-Off                                              $0.00
            Amount is equal to

      (c)   with respect to the Class B Investor Interest is equal to                                                $0.00

13.   The sum of all amounts payable to the Class B Certificateholders
      on the current Distribution Date is equal to                                                             $159,725.42

14.   Attached hereto is a true copy of the statement required to be delivered by
      the Master Servicer on the date of this Certificate to the Trustee pursuant to
      Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
 certificate this  17th day of May, 1999.



                           GREENWOOD TRUST COMPANY
                             as Master Servicer

                           By:
                              --------------------------
                           Vice President, Chief Accounting Officer,
                           and Treasurer


<PAGE>   1

                                                                     EXHIBIT (C)

                     MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                        Series 1993-3 Monthly Statement
                      Class A Certificate CUSIP #25466KAC3
                      Class B Certificate CUSIP #25466KAD1


Trust Distribution Date: May 17, 1999      Due Period Ending:  April 30, 1999

Pursuant to the Series Supplement dated as of November 23, 1993 relating to the
Pooling and Servicing Agreement dated as of October  1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust.  The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<CAPTION>
1.   Payments for the benefit of Series Investors this Due Period (per $1000 of Class Initial Investor Interest)
     -----------------------------------------------------------------------------------------------------------

     Series  1993-3                               Total          Interest       Principal
         <S>          <C>                      <C>             <C>             <C>
         Class A      30 days at 6.200000000%  $5.166666667    $5.166666667    $0.000000000

         Class B      30 days at 6.450000000%  $5.375000000    $5.375000000    $0.000000000
</TABLE>

<TABLE>
<CAPTION>
2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------
  <S>  <C>                                                <C>
  (a)  Aggregate Investor Interest                        $20,624,749,676.00

       Seller Interest                                     $5,632,195,899.94

       Total Master Trust                                 $26,256,945,575.94


  (b)  Group One Investor Interest                        $18,074,749,676.00

  (c)  Group Two Investor Interest                         $2,550,000,000.00

  (d)  Series 1993-3 Investor Interest                       $366,493,000.00

  (e)  Class A Investor Interest                             $350,000,000.00

       Class B Investor Interest                              $16,493,000.00
</TABLE>

<TABLE>
<CAPTION>
3.   Allocation of Receivables Collected During the Due Period
     ---------------------------------------------------------

                                                                     Finance Charge           Principal            Yield
                                                                      Collections            Collections         Collections
  <S>                                                                <C>                   <C>                        <C>
  (a)  Allocation of Collections between Investor and Seller

       Aggregate Investor Allocation                                  $316,121,219.78       $3,022,278,825.29          $0.00

       Seller                                                          $84,742,614.59         $810,182,277.03          $0.00

  (b)  Group One Allocation                                           $277,252,259.81       $2,650,671,899.42          $0.00

  (c)  Group Two Allocation                                            $38,868,959.97         $371,606,925.87          $0.00

  (d)  Series 1993-3 Allocations                                        $5,586,438.39          $53,409,177.92          $0.00

  (e)  Class A Allocations                                              $5,335,096.77          $51,006,224.81          $0.00

       Class B Allocations                                                $251,341.62           $2,402,953.11          $0.00
</TABLE>


<PAGE>   2


<TABLE>
<CAPTION>
4.   Information Concerning the Series Principal Funding Accounts ("SPFA")
     ---------------------------------------------------------------------
                         Deposits into the
                          SPFAs This         SPFA    Deposit Deficit  Investment
                          Due Period        Balance    Amount          Income
     <S>                     <C>            <C>           <C>           <C>
     Series 1993-3           $0.00          $0.00         0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
5.   Information Concerning Amount of Controlled Liquidation Payments
     ----------------------------------------------------------------
                                                               Total Payments
                              Amount Paid     Deficit Amount   Through This
                             This Due Period  This Due Period   Due Period
     <S>                           <C>               <C>               <C>
     Series 1993-3                 $0.00             $0.00             $0.00
</TABLE>

<TABLE>
<CAPTION>
6.   Information Concerning the Series Interest Funding Accounts ("SIFA")
     --------------------------------------------------------------------
                                            Deposits Into the
                                              SIFAs This
                                              Due Period       SIFA Balance
     <S>                                   <C>                       <C>
     Series 1993-3                         $1,896,983.21             $0.00
</TABLE>

<TABLE>
<CAPTION>
7.   Pool Factors
     ------------
                                                            This Due Period
     <S>                                                     <C>
     Class A                                                 1.00000000

     Class B                                                 1.00000000
</TABLE>

<TABLE>
<CAPTION>
8.   Investor Charged-Off Amount
     ---------------------------
                                                                Cumulative
                                                            Investor Charged-Off
                                           This Due Period        Amount
  <S>  <C>                                <C>                       <C>
  (a)  Group One                          $86,442,427.02            $0.00

  (b)  Group Two                          $12,118,664.92            $0.00

  (c)  Series 1993-3                       $1,741,754.22            $0.00

  (d)  Class A                             $1,663,390.28            $0.00

       Class B                                $78,363.94            $0.00
</TABLE>

<TABLE>
<CAPTION>
9.   Investor Losses This Due Period
     -------------------------------
                                                             Per $1,000 of
                                                            Original Invested
                                                 Total        Principal
  <S>  <C>                                         <C>            <C>
  (a)  Group One                                   $0.00          $0.00

  (b)  Group Two                                   $0.00          $0.00

  (c)  Series 1993-3                               $0.00          $0.00

  (d)  Class A                                     $0.00          $0.00

       Class B                                     $0.00          $0.00
</TABLE>
<PAGE>   3





<TABLE>
<CAPTION>
10.  Reimbursement of Investor Losses This Due Period        Per $1,000 of
     ------------------------------------------------       Original Invested
                                                 Total        Principal
  <S>  <C>                                         <C>            <C>
  (a)  Group One                                   $0.00          $0.00

  (b)  Group Two                                   $0.00          $0.00

  (c)  Series 1993-3                               $0.00          $0.00

  (d)  Class A                                     $0.00          $0.00

       Class B                                     $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
11.  Aggregate Amount of Unreimbursed Investor Losses        Per $1,000 of
     ------------------------------------------------       Original Invested
                                                 Total        Principal
  <S>  <C>                                         <C>            <C>
  (a)  Group One                                   $0.00          $0.00

  (b)  Group Two                                   $0.00          $0.00

  (c)  Series 1993-3                               $0.00          $0.00

  (d)  Class A                                     $0.00          $0.00

       Class B                                     $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
     -------------------------------------------------------------------
  <S>  <C>                                                <C>
  (a)  Group One                                          $30,315,482.22

  (b)  Group Two                                           $4,250,000.00

  (c)  Series 1993-3                                         $610,821.66

  (d)  Class A                                               $583,333.33

       Class B                                                $27,488.33
</TABLE>

<TABLE>
<CAPTION>
13.  Class Available Subordinated Amount at the end of the Due Period
     ----------------------------------------------------------------
                                                             As a Percentage
                                                               of Class A
                                                 Total       Invested Amount
     <S>                                     <C>                <C>
     Series 1993-3 Class B                   $23,822,045.00     6.8063%
</TABLE>

<TABLE>
<CAPTION>
14.  Total Available Credit Enhancement Amounts
     ------------------------------------------

                                                   Shared Amount  Class B Amount
     <S>                                         <C>             <C>
     Maximum Amount                              $9,162,325.00    $5,497,395.00

     Available Amount                            $9,162,325.00    $5,497,395.00

     Amount of Drawings on Credit Enhancement
       for this Due Period                               $0.00            $0.00
</TABLE>



<PAGE>   4





<TABLE>
<CAPTION>
15.  Delinquency Summary
     -------------------
     End of Due Period Master Trust Receivables Outstanding     $26,675,706,815.58

                         Delinquent Amount  Percentage of Ending
     Payment Status      Ending Balance     Receivables Outstanding
     <S>              <C>                        <C>
     30-59 days         $628,092,799.56          2.35%

     60-179 days      $1,127,022,100.37          4.22%
</TABLE>


                                 U.S. BANK NATIONAL ASSOCIATION
                                 as Trustee


                              BY:
                                  ----------------------------

                                        Vice President





<PAGE>   5





                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                        Series 1993-3 Monthly Statement

                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of November 23, 1993 (the "Series Supplement")
by and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1993-3 Master Trust Certificates for the Distribution Date
occurring on May 17, 1999:


<TABLE>
 <S>  <C>                                                                                                <C>
 1.   Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.   The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.   The aggregate amount of Collections processed during the related Due
      Period is equal to                                                                                 $4,233,324,936.71

 4.   The aggregate amount of Class A Principal Collections processed during
      the related Due Period is equal to                                                                    $51,006,224.81

 5.   The aggregate amount of Class A Finance Charge Collections processed
      during the related Due Period is equal to                                                              $5,335,096.77

 6a.  The aggregate amount of Class A Principal Collections recharacterized as
      Series Yield Collections during the related Due Period is equal to                                             $0.00

 6b.  The aggregate amount of Class A Additional Funds for this Distribution
      date is equal to                                                                                               $0.00

  7.  The amount of drawings under the Credit Enhancement required to be
      made on the related Drawing Date pursuant to the Series Supplement:

      (a)   with respect to the Class A Required Amount Shortfall                                                    $0.00
            is equal to

      (b)   with respect to the Class A Cumulative Investor Charged-Off                                              $0.00
            Amount is equal to

      (c)   with respect to the Class A Investor Interest is equal to                                                $0.00

 8.   The sum of all amounts payable to the Class A Certificateholders
      on the current Distribution Date is equal to                                                          $10,849,999.98
</TABLE>


<PAGE>   6





<TABLE>
<S>   <C>                                                                                                    <C>
 9.   The aggregate amount of Class B Principal Collections processed during
      the related Due Period is equal to                                                                     $2,402,953.11

10.   The aggregate amount of Class B Finance Charge Collections processed
      during the related Due Period is equal to                                                                $251,341.62

11a.  The aggregate amount of Class B Principal Collections recharacterized as
      Series Yield Collections during the related Due Period is equal to                                             $0.00

11b.  The aggregate amount of Class B Additional Funds for this Distribution
      date is equal to                                                                                               $0.00

 12.  The amount of drawings under the Credit Enhancement required to be
      made on the related Drawing Date pursuant to the Series Supplement:

      (a)   with respect to the Class B Required Amount Shortfall                                                    $0.00
            is equal to

      (b)   with respect to the Class B Cumulative Investor Charged-Off                                              $0.00
            Amount is equal to

      (c)   with respect to the Class B Investor Interest is equal to                                                $0.00

13.   The sum of all amounts payable to the Class B Certificateholders
      on the current Distribution Date is equal to                                                             $531,899.28

14.   Attached hereto is a true copy of the statement required to be delivered by
      the Master Servicer on the date of this Certificate to the Trustee pursuant to
      Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
 certificate this  17th day of May, 1999.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              ----------------------------
                           Vice President, Chief Accounting Officer,
                           and Treasurer







<PAGE>   1
                                                                     EXHIBIT (D)

                    MONTHLY CERTIFICATEHOLDERS' STATEMENT
                        Discover Card Master Trust I
                       Series 1994-2 Monthly Statement
                   Class A Certificate CUSIP #25466KAJ8
                   Class B Certificate CUSIP #25466KAK5


Trust Distribution Date: May 17, 1999         Due Period Ending:  April 30, 1999

Pursuant to the Series Supplement dated as of October 14, 1994 relating to the
Pooling and Servicing Agreement dated as of October  1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust.  The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<CAPTION>
1.   Payments for the benefit of Series Investors this Due Period (per $1000 of Class Initial Investor Interest)
     -----------------------------------------------------------------------------------------------------------
     Series  1994-2                                        Total          Interest        Principal
     <S>                 <C>                            <C>             <C>             <C>
            Class A      32 days at 5.276250000%        $4.690000000    $4.690000000    $0.000000000

            Class B      30 days at 8.050000000%        $6.708333333    $6.708333333    $0.000000000
</TABLE>

<TABLE>
<CAPTION>
2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------
<S>  <C>                                                <C>
 (a) Aggregate Investor Interest                        $20,624,749,676.00

     Seller Interest                                     $5,632,195,899.94

     Total Master Trust                                 $26,256,945,575.94


 (b) Group One Investor Interest                        $18,074,749,676.00

 (c) Group Two Investor Interest                         $2,550,000,000.00

 (d) Series 1994-2 Investor Interest                       $894,737,000.00

 (e) Class A Investor Interest                             $850,000,000.00

     Class B Investor Interest                              $44,737,000.00
</TABLE>

<TABLE>
<CAPTION>
3.   Allocation of Receivables Collected During the Due Period
     ---------------------------------------------------------

                                                           Finance Charge          Principal              Yield
                                                            Collections           Collections           Collections
<S>                                                         <C>               <C>                          <C>
 (a) Allocation of Collections between Investor and Seller

     Aggregate Investor Allocation                          $316,121,219.78   $3,022,278,825.29            $0.00

     Seller                                                  $84,742,614.59     $810,182,277.03            $0.00

 (b) Group One Allocation                                   $277,252,259.81   $2,650,671,899.42            $0.00

 (c) Group Two Allocation                                    $38,868,959.97     $371,606,925.87            $0.00

 (d) Series 1994-2 Allocations                               $13,638,189.37     $130,387,991.63            $0.00

 (e) Class A Allocations                                     $12,956,319.99     $123,868,975.29            $0.00

     Class B Allocations                                        $681,869.38       $6,519,016.34            $0.00
</TABLE>


<PAGE>   2
<TABLE>
<CAPTION>
4.   Information Concerning the Series Principal Funding Accounts ("SPFA")
     ---------------------------------------------------------------------
                         Deposits into the
                          SPFAs This        SPFA    Deposit Deficit     Investment
                          Due Period       Balance       Amount            Income
     <S>                     <C>           <C>           <C>               <C>
     Series 1994-2           $0.00         $0.00         0.00               $0.00
</TABLE>

<TABLE>
<CAPTION>
5.   Information Concerning Amount of Controlled Liquidation Payments
     ----------------------------------------------------------------

                                                                       Total Payments
                              Amount Paid         Deficit Amount       Through This
                             This Due Period      This Due Period       Due Period
     <S>                           <C>                   <C>                   <C>
     Series 1994-2                 $0.00                 $0.00                 $0.00
</TABLE>

<TABLE>
<CAPTION>
6.   Information Concerning the Series Interest Funding Accounts ("SIFA")
     --------------------------------------------------------------------

                                            Deposits Into the
                                              SIFAs This
                                              Due Period        SIFA Balance
     <S>                                   <C>                         <C>
     Series 1994-2                         $4,286,610.71               $0.00
</TABLE>

<TABLE>
<CAPTION>
7.   Pool Factors
     ------------
                                                            This Due Period
     <S>                                                     <C>
     Class A                                                 1.00000000

     Class B                                                 1.00000000
</TABLE>

<TABLE>
<CAPTION>
8.   Investor Charged-Off Amount
     ---------------------------
                                                              Cumulative
                                                           Investor Charged-Off
                                         This Due Period        Amount
 <S>                                      <C>                       <C>
 (a) Group One                            $86,442,427.02            $0.00

 (b) Group Two                            $12,118,664.92            $0.00

 (c) Series 1994-2                         $4,252,149.97            $0.00

 (d) Class A                               $4,039,554.97            $0.00

     Class B                                 $212,595.00            $0.00
</TABLE>

<TABLE>
<CAPTION>
9.   Investor Losses This Due Period
     -------------------------------
                                                             Per $1,000 of
                                                            Original Invested
                                                 Total        Principal
 <S>                                               <C>            <C>
 (a) Group One                                     $0.00          $0.00

 (b) Group Two                                     $0.00          $0.00

 (c) Series 1994-2                                 $0.00          $0.00

 (d) Class A                                       $0.00          $0.00

     Class B                                       $0.00          $0.00
</TABLE>
<PAGE>   3
<TABLE>
<CAPTION>
10.  Reimbursement of Investor Losses This Due Period        Per $1,000 of
     ------------------------------------------------       Original Invested
                                                 Total        Principal
 <S>                                               <C>            <C>
 (a) Group One                                     $0.00          $0.00

 (b) Group Two                                     $0.00          $0.00

 (c) Series 1994-2                                 $0.00          $0.00

 (d) Class A                                       $0.00          $0.00

     Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
11.  Aggregate Amount of Unreimbursed Investor Losses        Per $1,000 of
     ------------------------------------------------       Original Invested
                                                 Total        Principal
 <S>                                               <C>            <C>
 (a) Group One                                     $0.00          $0.00

 (b) Group Two                                     $0.00          $0.00

 (c) Series 1994-2                                 $0.00          $0.00

 (d) Class A                                       $0.00          $0.00

     Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
     -------------------------------------------------------------------
 <S> <C>                                                  <C>
 (a) Group One                                            $30,315,482.22

 (b) Group Two                                             $4,250,000.00

 (c) Series 1994-2                                         $1,491,228.34

 (d) Class A                                               $1,416,666.67

     Class B                                                  $74,561.67
</TABLE>

<TABLE>
<CAPTION>
13.  Class Available Subordinated Amount at the end of the Due Period
     ----------------------------------------------------------------
                                                             As a Percentage
                                                               of Class A
                                                 Total       Invested Amount
     <S>                                     <C>               <C>
     Series 1994-2 Class B                   $89,473,700.00    10.5263%
</TABLE>

<TABLE>
<CAPTION>
14.  Total Available Credit Enhancement Amounts
     ------------------------------------------
                                             Shared Amount   Class B Amount
     <S>                                           <C>      <C>
     Maximum Amount                                $0.00    $44,736,850.00

     Available Amount                              $0.00    $44,736,850.00

     Amount of Drawings on Credit Enhancement
       for this Due Period                         $0.00             $0.00
</TABLE>


<PAGE>   4
<TABLE>
<CAPTION>
15.  Delinquency Summary
     -------------------

     End of Due Period Master Trust Receivables Outstanding $26,675,706,815.58

                         Delinquent Amount  Percentage of Ending
     Payment Status      Ending Balance     Receivables Outstanding
     <S>              <C>                        <C>

     30-59 days         $628,092,799.56          2.35%

     60-179 days      $1,127,022,100.37          4.22%
</TABLE>


                                  U.S. BANK NATIONAL ASSOCIATION
                                  as Trustee


                              BY:
                                  ----------------------------
                                        Vice President


<PAGE>   5
                    MASTER SERVICER'S CERTIFICATE STATEMENT

                              Discover Card Master Trust I

                            Series 1994-2 Monthly Statement

                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of October 14, 1994 (the "Series Supplement")
by and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1994-2 Master Trust Certificates for the Distribution Date
occurring on May 17, 1999:

<TABLE>
 <S>                                                                                    <C>
 1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.  The aggregate amount of Collections processed during the related Due
     Period is equal to                                                                $4,233,324,936.71

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                  $123,868,975.29

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                            $12,956,319.99

 6a. The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                            $0.00

 6b. The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                              $0.00

  7.  The amount of drawings under the Credit Enhancement required to be
      made on the related Drawing Date pursuant to the Series Supplement:

      (a)  with respect to the Class A Required Amount Shortfall                                   $0.00
           is equal to

      (b)  with respect to the Class A Cumulative Investor Charged-Off                             $0.00
           Amount is equal to

      (c)  with respect to the Class A Investor Interest is equal to                               $0.00

 8.  The sum of all amounts payable to the Class A Certificateholders
     on the current Distribution Date is equal to                                          $3,986,500.00
</TABLE>


<PAGE>   6

<TABLE>
<S>  <C>                                                                                        <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                                         $6,519,016.34

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                                    $681,869.38

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                 $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution
     date is equal to                                                                                   $0.00

 12.  The amount of drawings under the Credit Enhancement required to be
      made on the related Drawing Date pursuant to the Series Supplement:

      (a)  with respect to the Class B Required Amount Shortfall                                        $0.00
           is equal to

      (b)  with respect to the Class B Cumulative Investor Charged-Off                                  $0.00
           Amount is equal to

      (c)  with respect to the Class B Investor Interest is equal to                                    $0.00

13.  The sum of all amounts payable to the Class B Certificateholders
     on the current Distribution Date is equal to                                                 $300,110.71

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant to
     Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
 certificate this  17th day of May, 1999.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              -------------------------
                           Vice President, Chief Accounting Officer,
                           and Treasurer



<PAGE>   1
                                                                     EXHIBIT (E)

                    MONTHLY CERTIFICATEHOLDERS' STATEMENT
                        Discover Card Master Trust I
                       Series 1994-3 Monthly Statement
                   Class A Certificate CUSIP #25466KAL3
                   Class B Certificate CUSIP #25466KAM1


Trust Distribution Date: May 17, 1999         Due Period Ending:  April 30, 1999

Pursuant to the Series Supplement dated as of October 20, 1994 relating to the
Pooling and Servicing Agreement dated as of October  1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust.  The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<CAPTION>
1.   Payments for the benefit of Series Investors this Due Period (per $1000 of Class Initial Investor Interest)
     -----------------------------------------------------------------------------------------------------------
     Series  1994-3                                     Total          Interest        Principal
     <S>              <C>                          <C>              <C>              <C>
         Class A      32 days at 5.116250000%      $4.547777778     $4.547777778     $0.000000000

         Class B      30 days at 7.750000000%      $6.458333333     $6.458333333     $0.000000000
</TABLE>

<TABLE>
<CAPTION>
2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------
<S>  <C>                                                <C>
 (a) Aggregate Investor Interest                        $20,624,749,676.00

     Seller Interest                                     $5,632,195,899.94

     Total Master Trust                                 $26,256,945,575.94


 (b) Group One Investor Interest                        $18,074,749,676.00

 (c) Group Two Investor Interest                         $2,550,000,000.00

 (d) Series 1994-3 Investor Interest                       $789,474,000.00

 (e) Class A Investor Interest                             $750,000,000.00

     Class B Investor Interest                              $39,474,000.00
</TABLE>

<TABLE>
<CAPTION>
3.   Allocation of Receivables Collected During the Due Period
     ---------------------------------------------------------

                                                                 Finance Charge          Principal               Yield
                                                                  Collections           Collections            Collections
 <S> <C>                                                        <C>                 <C>                          <C>
 (a) Allocation of Collections between Investor and Seller

     Aggregate Investor Allocation                              $316,121,219.78     $3,022,278,825.29            $0.00

     Seller                                                      $84,742,614.59       $810,182,277.03            $0.00

 (b) Group One Allocation                                       $277,252,259.81     $2,650,671,899.42            $0.00

 (c) Group Two Allocation                                        $38,868,959.97       $371,606,925.87            $0.00

 (d) Series 1994-3 Allocations                                   $12,033,531.44       $115,046,649.83            $0.00

 (e) Class A Allocations                                         $11,431,834.83       $109,294,125.72            $0.00

     Class B Allocations                                            $601,696.61         $5,752,524.11            $0.00
</TABLE>

<PAGE>   2


<TABLE>
<CAPTION>
4.   Information Concerning the Series Principal Funding Accounts ("SPFA")
     ---------------------------------------------------------------------

                         Deposits into the
                          SPFAs This        SPFA    Deposit Deficit    Investment
                          Due Period       Balance    Amount            Income
     <S>                     <C>           <C>           <C>             <C>
     Series 1994-3           $0.00         $0.00         0.00            $0.00
</TABLE>

<TABLE>
<CAPTION>
5.   Information Concerning Amount of Controlled Liquidation Payments
     ----------------------------------------------------------------

                                                                  Total Payments
                              Amount Paid      Deficit Amount     Through This
                             This Due Period   This Due Period     Due Period
     <S>                           <C>                <C>                 <C>
     Series 1994-3                 $0.00              $0.00               $0.00
</TABLE>

<TABLE>
<CAPTION>
6.   Information Concerning the Series Interest Funding Accounts ("SIFA")
     --------------------------------------------------------------------

                                            Deposits Into the
                                              SIFAs This
                                              Due Period        SIFA Balance
     <S>                                   <C>                         <C>
     Series 1994-3                         $3,665,769.58               $0.00
</TABLE>

<TABLE>
<CAPTION>
7.   Pool Factors
     ------------

                                                            This Due Period
     <S>                                                     <C>
     Class A                                                 1.00000000

     Class B                                                 1.00000000
</TABLE>

<TABLE>
<CAPTION>
8.   Investor Charged-Off Amount
     ---------------------------

                                                                 Cumulative
                                                              Investor Charged-Off
                                            This Due Period       Amount
 <S> <C>                                  <C>                       <C>
 (a) Group One                            $86,442,427.02            $0.00

 (b) Group Two                            $12,118,664.92            $0.00

 (c) Series 1994-3                         $3,751,845.57            $0.00

 (d) Class A                               $3,564,247.04            $0.00

     Class B                                 $187,598.53            $0.00
</TABLE>

<TABLE>
<CAPTION>
9.   Investor Losses This Due Period
     -------------------------------

                                                             Per $1,000 of
                                                            Original Invested
                                                 Total        Principal
 <S> <C>                                           <C>            <C>
 (a) Group One                                     $0.00          $0.00

 (b) Group Two                                     $0.00          $0.00

 (c) Series 1994-3                                 $0.00          $0.00

 (d) Class A                                       $0.00          $0.00

     Class B                                       $0.00          $0.00
</TABLE>


<PAGE>   3
<TABLE>
<CAPTION>
10.  Reimbursement of Investor Losses This Due Period        Per $1,000 of
     ------------------------------------------------       Original Invested
                                                 Total        Principal
 <S>                                               <C>            <C>
 (a) Group One                                     $0.00          $0.00

 (b) Group Two                                     $0.00          $0.00

 (c) Series 1994-3                                 $0.00          $0.00

 (d) Class A                                       $0.00          $0.00

     Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
11.  Aggregate Amount of Unreimbursed Investor Losses        Per $1,000 of
     ------------------------------------------------       Original Invested
                                                 Total        Principal
 <S> <C>                                           <C>            <C>
 (a) Group One                                     $0.00          $0.00

 (b) Group Two                                     $0.00          $0.00

 (c) Series 1994-3                                 $0.00          $0.00

 (d) Class A                                       $0.00          $0.00

     Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
     -------------------------------------------------------------------
 <S> <C>                                                  <C>
 (a) Group One                                            $30,315,482.22

 (b) Group Two                                             $4,250,000.00

 (c) Series 1994 3                                         $1,315,790.00

 (d) Class A                                               $1,250,000.00

     Class B                                                  $65,790.00
</TABLE>

<TABLE>
<CAPTION>
13.  Class Available Subordinated Amount at the end of the Due Period
     ----------------------------------------------------------------

                                                             As a Percentage
                                                               of Class A
                                                 Total       Invested Amount
     <S>                                     <C>               <C>
     Series 1994-3 Class B                   $78,947,400.00    10.5263%
</TABLE>

<TABLE>
<CAPTION>
14.  Total Available Credit Enhancement Amounts
     ------------------------------------------


                                             Shared Amount     Class B Amount
     <S>                                           <C>        <C>
     Maximum Amount                                $0.00      $39,473,700.00

     Available Amount                              $0.00      $39,473,700.00

     Amount of Drawings on Credit Enhancement
       for this Due Period                         $0.00               $0.00
</TABLE>

<PAGE>   4
<TABLE>
<CAPTION>
15.  Delinquency Summary
     -------------------

     End of Due Period Master Trust Receivables Outstanding   $26,675,706,815.58

                         Delinquent Amount  Percentage of Ending
     Payment Status      Ending Balance     Receivables Outstanding
     <S>              <C>                        <C>
     30-59 days         $628,092,799.56          2.35%

     60-179 days      $1,127,022,100.37          4.22%
</TABLE>


                                 U.S. BANK NATIONAL ASSOCIATION
                                 as Trustee


                              BY:
                                  ----------------------------
                                        Vice President


<PAGE>   5
                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                        Series 1994-3 Monthly Statement

                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of October 20, 1994 (the "Series Supplement")
by and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1994-3 Master Trust Certificates for the Distribution Date
occurring on May 17, 1999:

<TABLE>
 <S> <C>                                                                                        <C>
 1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.  The aggregate amount of Collections processed during the related Due
     Period is equal to                                                                         $4,233,324,936.71

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                           $109,294,125.72

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                                     $11,431,834.83

 6a. The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                     $0.00

 6b. The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                       $0.00

  7. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall                                             $0.00
          is equal to

     (b)  with respect to the Class A Cumulative Investor Charged-Off                                       $0.00
          Amount is equal to

     (c)  with respect to the Class A Investor Interest is equal to                                         $0.00

 8.  The sum of all amounts payable to the Class A Certificateholders
     on the current Distribution Date is equal to                                                   $3,410,833.33
</TABLE>


<PAGE>   6
<TABLE>
<S>                                                                                                 <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                                             $5,752,524.11

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                                        $601,696.61

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                     $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution
     date is equal to                                                                                       $0.00

 12. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall                                             $0.00
          is equal to

     (b)  with respect to the Class B Cumulative Investor Charged-Off                                       $0.00
          Amount is equal to

     (c)  with respect to the Class B Investor Interest is equal to                                         $0.00

13.  The sum of all amounts payable to the Class B Certificateholders
     on the current Distribution Date is equal to                                                     $254,936.25

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant to
     Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this  17th day of May, 1999.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              --------------------------
                           Vice President, Chief Accounting Officer,
                           and Treasurer


<PAGE>   1
                                                                     EXHIBIT (F)

                    MONTHLY CERTIFICATEHOLDERS' STATEMENT
                        Discover Card Master Trust I
                       Series 1994-A Monthly Statement


Trust Distribution Date: May 17, 1999         Due Period Ending:  April 30, 1999

Pursuant to the Series Supplement dated as of December 20, 1994 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust.  The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<CAPTION>
1.   Payments for the benefit of Series Investors this Due Period (per $1000 of Class Initial Investor Interest)
     -----------------------------------------------------------------------------------------------------------
     Series  1994-A                                     Total        Interest        Principal
     <S>              <C>                          <C>            <C>              <C>
         Class A      30 days at 5.035635160%      $4.196362633   $4.196362633     $0.000000000
</TABLE>

<TABLE>
<CAPTION>
2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------
 <S> <C>                                                <C>
 (a) Aggregate Investor Interest                        $20,624,749,676.00

     Seller Interest                                     $5,632,195,899.94

     Total Master Trust                                 $26,256,945,575.94


 (b) Group One Investor Interest                        $18,074,749,676.00

 (c) Group Two Investor Interest                         $2,550,000,000.00

 (d) Series 1994-A Investor Interest                     $2,550,000,000.00

 (e) Class A Investor Interest                           $2,550,000,000.00

     Class B Investor Interest                                       $0.00
</TABLE>

<TABLE>
<CAPTION>
3.   Allocation of Receivables Collected During the Due Period
     ---------------------------------------------------------
                                                                Finance Charge         Principal           Yield
                                                                 Collections          Collections        Collections
<S>                                                             <C>               <C>                      <C>
 (a) Allocation of Collections between Investor and Seller

     Aggregate Investor Allocation                              $316,121,219.78   $3,022,278,825.29        $0.00

     Seller                                                      $84,742,614.59     $810,182,277.03        $0.00

 (b) Group One Allocation                                       $277,252,259.81   $2,650,671,899.42        $0.00

 (c) Group Two Allocation                                        $38,868,959.97     $371,606,925.87        $0.00

 (d) Series 1994-A Allocations                                   $38,868,959.97     $371,606,925.87        $0.00

 (e) Class A Allocations                                         $38,868,959.97     $371,606,925.87        $0.00

     Class B Allocations                                                  $0.00               $0.00        $0.00
</TABLE>

<PAGE>   2
<TABLE>
<CAPTION>
4.   Information Concerning the Series Principal Funding Accounts ("SPFA")
     ---------------------------------------------------------------------
                         Deposits into the
                          SPFAs This        SPFA    Deposit Deficit    Investment
                          Due Period       Balance    Amount            Income
     <S>                     <C>           <C>           <C>             <C>
     Series 1994-A           $0.00         $0.00         0.00            $0.00
</TABLE>

<TABLE>
<CAPTION>
5.   Information Concerning Amount of Controlled Liquidation Payments
     ----------------------------------------------------------------
                                                                 Total Payments
                              Amount Paid    Deficit Amount      Through This
                             This Due Period This Due Period      Due Period
     <S>                           <C>              <C>               <C>
     Series 1994-A                 $0.00            $0.00             $0.00
</TABLE>

<TABLE>
<CAPTION>
6.   Information Concerning the Series Interest Funding Accounts ("SIFA")
     --------------------------------------------------------------------
                                            Deposits Into the
                                              SIFAs This
                                              Due Period     SIFA Balance
     <S>                                  <C>                       <C>
     Series 1994-A                        $10,700,724.71            $0.00
</TABLE>

<TABLE>
<CAPTION>
7.   Pool Factors
     ------------                                         This Due Period
     <S>                                                     <C>
     Class A                                                 1.00000000

     Class B                                                 0.00000000
</TABLE>

<TABLE>
<CAPTION>
8.   Investor Charged-Off Amount
     ---------------------------                              Cumulative
                                                           Investor Charged-Off
                                         This Due Period         Amount
 <S> <C>                                  <C>                       <C>
 (a) Group One                            $86,442,427.02            $0.00

 (b) Group Two                            $12,118,664.92            $0.00

 (c) Series 1994-A                        $12,118,664.92            $0.00

 (d) Class A                              $12,118,664.92            $0.00

     Class B                                       $0.00            $0.00
</TABLE>

<TABLE>
<CAPTION>
9.   Investor Losses This Due Period
     -------------------------------                         Per $1,000 of
                                                            Original Invested
                                                 Total        Principal
 <S> <C>                                           <C>            <C>
 (a) Group One                                     $0.00          $0.00

 (b) Group Two                                     $0.00          $0.00

 (c) Series 1994-A                                 $0.00          $0.00

 (d) Class A                                       $0.00          $0.00

     Class B                                       $0.00          $0.00
</TABLE>


<PAGE>   3
<TABLE>
<CAPTION>
10.  Reimbursement of Investor Losses This Due Period        Per $1,000 of
     ------------------------------------------------       Original Invested
                                                 Total        Principal
 <S> <C>                                           <C>            <C>
 (a) Group One                                     $0.00          $0.00

 (b) Group Two                                     $0.00          $0.00

 (c) Series 1994-A                                 $0.00          $0.00

 (d) Class A                                       $0.00          $0.00

     Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
11.  Aggregate Amount of Unreimbursed Investor Losses        Per $1,000 of
     ------------------------------------------------       Original Invested
                                                 Total        Principal
 <S> <C>                                           <C>            <C>
 (a) Group One                                     $0.00          $0.00

 (b) Group Two                                     $0.00          $0.00

 (c) Series 1994-A                                 $0.00          $0.00

 (d) Class A                                       $0.00          $0.00

     Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
     -------------------------------------------------------------------
 <S> <C>                                                  <C>
 (a) Group One                                            $30,315,482.22

 (b) Group Two                                             $4,250,000.00

 (c) Series 1994-A                                         $4,250,000.00

 (d) Class A                                               $4,250,000.00

     Class B                                                       $0.00
</TABLE>

<TABLE>
<CAPTION>
13.  Class Available Subordinated Amount at the end of the Due Period
     ----------------------------------------------------------------
                                                             As a Percentage
                                                               of Class A
                                                 Total       Invested Amount
     <S>                                        <C>             <C>
     Series 1994-A Class B                      $0.00           0.0000%
</TABLE>

<TABLE>
<CAPTION>
14.  Total Available Credit Enhancement Amounts
     ------------------------------------------
                                             Shared Amount  Class B Amount
     <S>                                 <C>                        <C>
     Maximum Amount                      $204,000,000.00            $0.00

     Available Amount                    $204,000,000.00            $0.00

     Amount of Drawings on Credit Enhancement
       for this Due Period                         $0.00            $0.00
</TABLE>

<PAGE>   4
<TABLE>
<CAPTION>
15.  Delinquency Summary
     -------------------
     End of Due Period Master Trust Receivables Outstanding            $26,675,706,815.58

                         Delinquent Amount  Percentage of Ending
     Payment Status      Ending Balance     Receivables Outstanding

     <S>              <C>                        <C>
     30-59 days         $628,092,799.56          2.35%

     60-179 days      $1,127,022,100.37          4.22%
</TABLE>


                                 U.S. BANK NATIONAL ASSOCIATION
                                 as Trustee


                              BY:
                                  ----------------------------
                                        Vice President


<PAGE>   5

                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                        Series 1994-A Monthly Statement

                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of December 20, 1994 (the "Series Supplement")
by and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1994-A Master Trust Certificates for the Distribution Date
occurring on May 17, 1999:


<TABLE>
<S>  <C>                                                                              <C>
 1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.  The aggregate amount of Collections processed during the related Due
     Period is equal to                                                                 $4,233,324,936.71

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                   $371,606,925.87

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                             $38,868,959.97

 6a. The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                             $0.00

 6b. The aggregate amount of Class A Additional Funds for this Distribution
     Date is equal to                                                                               $0.00

 7.  The sum of all amounts payable to the Class A Certificateholders
     on the current Distribution Date is equal to                                          $10,700,724.71

 8.  The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall                                     $0.00
          is equal to

     (b)  with respect to the Class A Cumulative Investor Charged-Off                               $0.00
          Amount is equal to

     (c)  with respect to the Class A Investor Interest is equal to                                 $0.00
</TABLE>

<PAGE>   6
<TABLE>
<S> <C>
 9. Attached hereto is a true copy of the statement required to be delivered by
    the Master Servicer on the date of this Certificate to the Trustee pursuant to
    Section 16 of the Series Supplement.
</TABLE>

    IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this  17th day of May, 1999.



                           GREENWOOD TRUST COMPANY
                             as Master Servicer

                           By:
                              -------------------------
                           Vice President, Chief Accounting Officer,
                           and Treasurer

<PAGE>   1
                                                                    EXHIBIT (G)

                    MONTHLY CERTIFICATEHOLDERS' STATEMENT
                        Discover Card Master Trust I
                       Series 1995-1 Monthly Statement
                   Class A Certificate CUSIP #25466KAN9
                   Class B Certificate CUSIP #25466KAP4


Trust Distribution Date: May 17, 1999       Due Period Ending:  April 30, 1999

Pursuant to the Series Supplement dated as of April 19, 1995 relating to the
Pooling and Servicing Agreement dated as of October  1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust.  The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<CAPTION>
1.   Payments for the benefit of Series Investors this Due Period (per $1000 of Class Initial Investor Interest)
     -----------------------------------------------------------------------------------------------------------

     Series  1995-1                                Total       Interest      Principal
         <S>                                   <C>            <C>            <C>
         Class A      32 days at 5.206250000%  $4.627777778   $4.627777778   $0.000000000

         Class B      32 days at 5.376250000%  $4.778888889   $4.778888889   $0.000000000
</TABLE>

<TABLE>
<CAPTION>
2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------
  <S>                                                    <C>
  (a) Aggregate Investor Interest                        $20,624,749,676.00

      Seller Interest                                     $5,632,195,899.94

      Total Master Trust                                 $26,256,945,575.94


  (b) Group One Investor Interest                        $18,074,749,676.00

  (c) Group Two Investor Interest                         $2,550,000,000.00

  (d) Series 1995-1 Investor Interest                       $631,579,000.00

  (e) Class A Investor Interest                             $600,000,000.00

      Class B Investor Interest                              $31,579,000.00
</TABLE>

<TABLE>
<CAPTION>
3.   Allocation of Receivables Collected During the Due Period
     ---------------------------------------------------------

                                                            Finance Charge       Principal         Yield
                                                             Collections        Collections      Collections

  <S>                                                       <C>               <C>                   <C>
  (a) Allocation of Collections between Investor and Seller

      Aggregate Investor Allocation                         $316,121,219.78   $3,022,278,825.29      $0.00

      Seller                                                 $84,742,614.59     $810,182,277.03      $0.00

  (b) Group One Allocation                                  $277,252,259.81   $2,650,671,899.42      $0.00

  (c) Group Two Allocation                                   $38,868,959.97     $371,606,925.87      $0.00

  (d) Series 1995-1 Allocations                               $9,627,145.84      $92,040,385.83      $0.00

  (e) Class A Allocations                                     $9,145,708.38      $87,437,600.05      $0.00

      Class B Allocations                                       $481,437.46       $4,602,785.78      $0.00
</TABLE>


<PAGE>   2


<TABLE>
<CAPTION>
4.   Information Concerning the Series Principal Funding Accounts ("SPFA")
     ---------------------------------------------------------------------
                         Deposits into the
                          SPFAs This        SPFA    Deposit Deficit  Investment
                          Due Period       Balance       Amount        Income
    <S>                     <C>            <C>          <C>           <C>
     Series 1995-1           $0.00         $0.00         0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>

5.   Information Concerning Amount of Controlled Liquidation Payments
     ----------------------------------------------------------------
                                                              Total Payments
                              Amount Paid    Deficit Amount   Through This
                             This Due Period This Due Period   Due Period
    <S>                           <C>              <C>            <C>
     Series 1995-1                 $0.00            $0.00         $0.00
</TABLE>

<TABLE>
<CAPTION>
6.   Information Concerning the Series Interest Funding Accounts ("SIFA")
     --------------------------------------------------------------------
                                            Deposits Into the
                                              SIFAs This
                                              Due Period     SIFA Balance
    <S>                                   <C>                       <C>
     Series 1995-1                         $2,927,579.20            $0.00
</TABLE>

<TABLE>
<CAPTION>
7.   Pool Factors
     ------------
                                                            This Due Period
     <S>                                                     <C>
     Class A                                                 1.00000000

     Class B                                                 1.00000000
</TABLE>

<TABLE>
<CAPTION>
8.   Investor Charged-Off Amount
     ---------------------------
                                                                 Cumulative
                                                             Investor Charged-Off
                                            This Due Period        Amount
  <S>                                      <C>                     <C>
  (a) Group One                            $86,442,427.02            $0.00

  (b) Group Two                            $12,118,664.92            $0.00

  (c) Series 1995-1                         $3,001,576.44            $0.00

  (d) Class A                               $2,851,472.62            $0.00

      Class B                                 $150,103.82            $0.00
</TABLE>

<TABLE>
<CAPTION>
9.   Investor Losses This Due Period
     -------------------------------
                                                               Per $1,000 of
                                                              Original Invested
                                                   Total        Principal
  <S>                                              <C>            <C>
  (a) Group One                                     $0.00          $0.00

  (b) Group Two                                     $0.00          $0.00

  (c) Series 1995-1                                 $0.00          $0.00

  (d) Class A                                       $0.00          $0.00

      Class B                                       $0.00          $0.00
</TABLE>

<PAGE>   3



<TABLE>
<CAPTION>
10.  Reimbursement of Investor Losses This Due Period
     ------------------------------------------------           Per $1,000 of
                                                               Original Invested
                                                    Total        Principal
  <S>                                              <C>            <C>
  (a) Group One                                     $0.00          $0.00

  (b) Group Two                                     $0.00          $0.00

  (c) Series 1995-1                                 $0.00          $0.00

  (d) Class A                                       $0.00          $0.00

      Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
11.   Aggregate Amount of Unreimbursed Investor Losses
      ------------------------------------------------         Per $1,000 of
                                                              Original Invested
                                                   Total        Principal
  <S>                                              <C>            <C>
  (a) Group One                                     $0.00          $0.00

  (b) Group Two                                     $0.00          $0.00

  (c) Series 1995-1                                 $0.00          $0.00

  (d) Class A                                       $0.00          $0.00

      Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
12.   Investor Monthly Servicing Fee Payable at the end of the Due Period
      -------------------------------------------------------------------
  <S>                                                     <C>
  (a) Group One                                            $30,315,482.22

  (b) Group Two                                             $4,250,000.00

  (c) Series 1995-1                                         $1,052,631.67

  (d) Class A                                               $1,000,000.00

      Class B                                                  $52,631.67
</TABLE>

<TABLE>
<CAPTION>
13.  Class Available Subordinated Amount at the end of the Due Period
     ----------------------------------------------------------------
                                                             As a Percentage
                                                               of Class A
                                                 Total       Invested Amount
     <S>                                     <C>               <C>
     Series 1995-1 Class B                   $69,473,690.00    11.5789%
</TABLE>

<TABLE>
<CAPTION>
14.  Total Available Credit Enhancement Amounts
     ------------------------------------------

                                             Shared Amount  Class B Amount
     <S>                                          <C>      <C>
     Maximum Amount                                $0.00   $37,894,740.00

     Available Amount                              $0.00   $37,894,740.00

     Amount of Drawings on Credit Enhancement
       for this Due Period                         $0.00            $0.00
</TABLE>

<PAGE>   4


<TABLE>
<CAPTION>
15.  Delinquency Summary
     -------------------

     End of Due Period Master Trust Receivables Outstanding  $26,675,706,815.58

                           Delinquent Amount  Percentage of Ending
     Payment Status        Ending Balance     Receivables Outstanding
     <S>                 <C>                        <C>
     30-59 days             $628,092,799.56          2.35%

     60-179 days          $1,127,022,100.37          4.22%


                                 U.S. BANK NATIONAL ASSOCIATION
                                 as Trustee


                              BY:
                                 -------------------------------

                                        Vice President
</TABLE>

<PAGE>   5
                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                        Series 1995-1 Monthly Statement

                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of April 19, 1995 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1995-1 Master Trust Certificates for the Distribution Date
occurring on May 17, 1999:

<TABLE>
<S>                                                                           <C>
 1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.  The aggregate amount of Collections processed during the related Due
     Period is equal to                                                         $4,233,324,936.71

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                            $87,437,600.05

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                      $9,145,708.38

 6a. The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                     $0.00

 6b. The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                       $0.00

 7.  The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall                             $0.00
          is equal to

     (b)  with respect to the Class A Cumulative Investor Charged-Off                       $0.00
          Amount is equal to

     (c)  with respect to the Class A Investor Interest is equal to                         $0.00

 8.  The sum of all amounts payable to the Class A Certificateholders
     on the current Distribution Date is equal to                                   $2,776,666.67
</TABLE>

<PAGE>   6

<TABLE>
<S>                                                                               <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                            $4,602,785.78

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                       $481,437.46

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                    $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution
     date is equal to                                                                      $0.00

12.  The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall                            $0.00
          is equal to

     (b)  with respect to the Class B Cumulative Investor Charged-Off                      $0.00
          Amount is equal to

     (c)  with respect to the Class B Investor Interest is equal to                        $0.00

13.  The sum of all amounts payable to the Class B Certificateholders
     on the current Distribution Date is equal to                                    $150,912.53

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant to
     Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 17th day of May, 1999.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              -------------------------------
                           Vice President, Chief Accounting Officer,
                           and Treasurer

<PAGE>   1

                                                                    EXHIBIT (H)

                     MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                        Series 1995-2 Monthly Statement
                      Class A Certificate CUSIP #25466KAQ2
                      Class B Certificate CUSIP #25466KAR0


Trust Distribution Date: May 17, 1999      Due Period Ending:  April 30, 1999

Pursuant to the Series Supplement dated as of August 1, 1995 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust.  The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<CAPTION>
1.   Payments for the benefit of Series Investors this Due Period (per $1000 of Class Initial Investor Interest)
     -----------------------------------------------------------------------------------------------------------

     Series  1995-2                                 Total       Interest       Principal
         <S>                                   <C>            <C>            <C>
         Class A      30 days at 6.550000000%  $5.458333333   $5.458333333   $0.000000000

         Class B      30 days at 6.750000000%  $5.625000000   $5.625000000   $0.000000000
</TABLE>

<TABLE>
<CAPTION>
2.   Principal Receivables at the end of the Due Period
  <S>                                                   <C>
  (a) Aggregate Investor Interest                        $20,624,749,676.00

      Seller Interest                                     $5,632,195,899.94

      Total Master Trust                                 $26,256,945,575.94


  (b) Group One Investor Interest                        $18,074,749,676.00

  (c) Group Two Investor Interest                         $2,550,000,000.00

  (d) Series 1995-2 Investor Interest                       $526,316,000.00

  (e) Class A Investor Interest                             $500,000,000.00

      Class B Investor Interest                              $26,316,000.00
</TABLE>

<TABLE>
<CAPTION>
3.   Allocation of Receivables Collected During the Due Period
     ---------------------------------------------------------
                                                                 Finance Charge        Principal        Yield
                                                                  Collections         Collections     Collections
  <S>                                                           <C>                <C>                   <C>
  (a) Allocation of Collections between Investor and Seller

      Aggregate Investor Allocation                              $316,121,219.78   $3,022,278,825.29      $0.00

      Seller                                                      $84,742,614.59     $810,182,277.03      $0.00

  (b) Group One Allocation                                       $277,252,259.81   $2,650,671,899.42      $0.00

  (c) Group Two Allocation                                        $38,868,959.97     $371,606,925.87      $0.00

  (d) Series 1995-2 Allocations                                    $8,022,487.92      $76,699,044.04      $0.00

  (e) Class A Allocations                                          $7,621,223.22      $72,862,750.48      $0.00

      Class B Allocations                                            $401,264.70       $3,836,293.56      $0.00
</TABLE>

<PAGE>   2


<TABLE>
<CAPTION>
4.   Information Concerning the Series Principal Funding Accounts ("SPFA")
     ---------------------------------------------------------------------
                         Deposits into the
                          SPFAs This        SPFA    Deposit Deficit  Investment
                          Due Period       Balance      Amount         Income
     <S>                     <C>           <C>          <C>            <C>
     Series 1995-2           $0.00         $0.00         0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
5.   Information Concerning Amount of Controlled Liquidation Payments
     ----------------------------------------------------------------
                                                                 Total Payments
                              Amount Paid      Deficit Amount     Through This
                             This Due Period   This Due Period     Due Period
     <S>                           <C>             <C>               <C>
     Series 1995-2                 $0.00            $0.00             $0.00
</TABLE>

<TABLE>
<CAPTION>
6.   Information Concerning the Series Interest Funding Accounts ("SIFA")
     --------------------------------------------------------------------
                                            Deposits Into the
                                              SIFAs This
                                              Due Period     SIFA Balance
     <S>                                   <C>              <C>
     Series 1995-2                         $2,877,194.17    $8,631,582.51
</TABLE>

<TABLE>
<CAPTION>
7.   Pool Factors
     ------------
                                                           This Due Period
     <S>                                                    <C>
     Class A                                                 1.00000000

     Class B                                                 1.00000000
</TABLE>

<TABLE>
<CAPTION>
8.   Investor Charged-Off Amount
     ---------------------------
                                                                 Cumulative
                                                              Investor Charged-Off
                                            This Due Period         Amount
  <S>                                      <C>                       <C>
  (a) Group One                            $86,442,427.02            $0.00

  (b) Group Two                            $12,118,664.92            $0.00

  (c) Series 1995-2                         $2,501,272.05            $0.00

  (d) Class A                               $2,376,164.70            $0.00

      Class B                                 $125,107.35            $0.00
</TABLE>

<TABLE>
<CAPTION>
9.   Investor Losses This Due Period
     -------------------------------
                                                                 Per $1,000 of
                                                               Original Invested
                                                    Total         Principal
  <S>                                              <C>            <C>
  (a) Group One                                     $0.00          $0.00

  (b) Group Two                                     $0.00          $0.00

  (c) Series 1995-2                                 $0.00          $0.00

  (d) Class A                                       $0.00          $0.00

      Class B                                       $0.00          $0.00
</TABLE>

<PAGE>   3

<TABLE>
<CAPTION>
10.   Reimbursement of Investor Losses This Due Period
      ------------------------------------------------           Per $1,000 of
                                                               Original Invested
                                                    Total          Principal
  <S>                                              <C>            <C>
  (a) Group One                                     $0.00          $0.00

  (b) Group Two                                     $0.00          $0.00

  (c) Series 1995-2                                 $0.00          $0.00

  (d) Class A                                       $0.00          $0.00

      Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
11.   Aggregate Amount of Unreimbursed Investor Losses
      ------------------------------------------------         Per $1,000 of
                                                              Original Invested
                                                    Total         Principal
  <S>                                               <C>            <C>
  (a) Group One                                     $0.00          $0.00

  (b) Group Two                                     $0.00          $0.00

  (c) Series 1995-2                                 $0.00          $0.00

  (d) Class A                                       $0.00          $0.00

      Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
12.   Investor Monthly Servicing Fee Payable at the end of the Due Period
      -------------------------------------------------------------------
  <S>                                                      <C>
  (a) Group One                                            $30,315,482.22

  (b) Group Two                                             $4,250,000.00

  (c) Series 1995-2                                           $877,193.33

  (d) Class A                                                 $833,333.33

      Class B                                                  $43,860.00
</TABLE>

<TABLE>
<CAPTION>
13.  Class Available Subordinated Amount at the end of the Due Period
     ----------------------------------------------------------------
                                                             As a Percentage
                                                               of Class A
                                                 Total       Invested Amount
     <S>                                    <C>                <C>
     Series 1995-2 Class B                   $34,210,540.00     6.8421%
</TABLE>

<TABLE>
<CAPTION>
14.  Total Available Credit Enhancement Amounts
     ------------------------------------------
                                             Shared Amount  Class B Amount
     <S>                                          <C>      <C>
     Maximum Amount                                $0.00   $15,789,480.00

     Available Amount                              $0.00   $15,789,480.00

     Amount of Drawings on Credit Enhancement
       for this Due Period                         $0.00            $0.00
</TABLE>

<PAGE>   4


<TABLE>
<CAPTION>
15.  Delinquency Summary
     -------------------

     End of Due Period Master Trust Receivables Outstanding  $26,675,706,815.58

                         Delinquent Amount  Percentage of Ending
     Payment Status      Ending Balance     Receivables Outstanding
     <S>               <C>                        <C>
     30-59 days           $628,092,799.56          2.35%

     60-179 days        $1,127,022,100.37          4.22%
</TABLE>


                                 U.S. BANK NATIONAL ASSOCIATION
                                 as Trustee


                              BY:
                                 -----------------------------------

                                        Vice President

<PAGE>   5
                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                        Series 1995-2 Monthly Statement

                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of August 1, 1995 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1995-2 Master Trust Certificates for the Distribution Date
occurring on May 17, 1999:

<TABLE>
<S>                                                                           <C>
 1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.  The aggregate amount of Collections processed during the related Due
     Period is equal to                                                         $4,233,324,936.71

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                            $72,862,750.48

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                      $7,621,223.22

 6a. The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                     $0.00

 6b. The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                       $0.00

 7.  The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall                             $0.00
          is equal to

     (b)  with respect to the Class A Cumulative Investor Charged-Off                       $0.00
          Amount is equal to

     (c)  with respect to the Class A Investor Interest is equal to                         $0.00

 8.  The sum of all amounts payable to the Class A Certificateholders
     on the current Distribution Date is equal to                                           $0.00
</TABLE>

<PAGE>   6


<TABLE>
<S>                                                                               <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                            $3,836,293.56

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                       $401,264.70

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                    $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution
     date is equal to                                                                      $0.00

12.  The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall                            $0.00
          is equal to

     (b)  with respect to the Class B Cumulative Investor Charged-Off                      $0.00
          Amount is equal to

     (c)  with respect to the Class B Investor Interest is equal to                        $0.00

13.  The sum of all amounts payable to the Class B Certificateholders
     on the current Distribution Date is equal to                                          $0.00

14.  Attached hereto is a true copy of the statement required to be
     delivered by the Master Servicer on the date of this Certificate
     to the Trustee pursuant to Section 16 of the Series Supplement.
</TABLE>


     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 17th day of May, 1999.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              -------------------------------
                           Vice President, Chief Accounting Officer,
                           and Treasurer


<PAGE>   1

                                                                    EXHIBIT (I)

                     MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                        Series 1995-3 Monthly Statement
                      Class A Certificate CUSIP #25466KAS8
                      Class B Certificate CUSIP #25466KAT6


Trust Distribution Date: May 17, 1999        Due Period Ending:  April 30, 1999

Pursuant to the Series Supplement dated as of September 28, 1995 relating to
the Pooling and Servicing Agreement dated as of October  1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust.  The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<CAPTION>
1.   Payments for the benefit of Series Investors this Due Period (per $1000 of Class Initial Investor Interest)
     -----------------------------------------------------------------------------------------------------------

     Series  1995-3                                Total         Interest       Principal
    <S>                                        <C>           <C>              <C>
         Class A      32 days at 5.136250000%  $4.565555556   $4.565555556    $0.000000000

         Class B      32 days at 5.256250000%  $4.672222222   $4.672222222    $0.000000000
</TABLE>

<TABLE>
<CAPTION>
2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------
  <S>                                                   <C>
  (a) Aggregate Investor Interest                        $20,624,749,676.00

      Seller Interest                                     $5,632,195,899.94

      Total Master Trust                                 $26,256,945,575.94


  (b) Group One Investor Interest                        $18,074,749,676.00

  (c) Group Two Investor Interest                         $2,550,000,000.00

  (d) Series 1995-3 Investor Interest                       $526,316,000.00

  (e) Class A Investor Interest                             $500,000,000.00

      Class B Investor Interest                              $26,316,000.00
</TABLE>

<TABLE>
<CAPTION>
3.   Allocation of Receivables Collected During the Due Period
     ---------------------------------------------------------

                                                                Finance Charge         Principal            Yield
                                                                 Collections          Collections         Collections
  <S>                                                         <C>                  <C>                       <C>
  (a) Allocation of Collections between Investor and Seller

      Aggregate Investor Allocation                            $316,121,219.78      $3,022,278,825.29         $0.00

      Seller                                                    $84,742,614.59        $810,182,277.03         $0.00

  (b) Group One Allocation                                     $277,252,259.81      $2,650,671,899.42         $0.00

  (c) Group Two Allocation                                      $38,868,959.97        $371,606,925.87         $0.00

  (d) Series 1995-3 Allocations                                  $8,022,487.92         $76,699,044.04         $0.00

  (e) Class A Allocations                                        $7,621,223.22         $72,862,750.48         $0.00

      Class B Allocations                                          $401,264.70          $3,836,293.56         $0.00
</TABLE>


<PAGE>   2



<TABLE>
<CAPTION>
4.   Information Concerning the Series Principal Funding Accounts ("SPFA")
     ---------------------------------------------------------------------
                         Deposits into the
                          SPFAs This        SPFA    Deposit Deficit  Investment
                          Due Period       Balance      Amount         Income
     <S>                     <C>          <C>           <C>            <C>
     Series 1995-3           $0.00         $0.00         0.00           $0.00
</TABLE>

<TABLE>
<CAPTION>
5.   Information Concerning Amount of Controlled Liquidation Payments
     ----------------------------------------------------------------
                                                              Total Payments
                              Amount Paid    Deficit Amount   Through This
                             This Due Period This Due Period   Due Period
     <S>                           <C>            <C>             <C>
     Series 1995-3                 $0.00          $0.00           $0.00
</TABLE>

<TABLE>
<CAPTION>
6.   Information Concerning the Series Interest Funding Accounts ("SIFA")
     --------------------------------------------------------------------
                                            Deposits Into the
                                              SIFAs This
                                              Due Period     SIFA Balance
     <S>                                  <C>                  <C>
     Series 1995-3                         $2,405,731.98        $0.00
</TABLE>

<TABLE>
<CAPTION>
7.   Pool Factors
     ------------
                                                            This Due Period
     <S>                                                    <C>
     Class A                                                 1.00000000

     Class B                                                 1.00000000
</TABLE>

<TABLE>
<CAPTION>
8.   Investor Charged-Off Amount
     ---------------------------
                                                                   Cumulative
                                                              Investor Charged-Off
                                            This Due Period         Amount
  <S>                                     <C>                       <C>
  (a) Group One                            $86,442,427.02            $0.00

  (b) Group Two                            $12,118,664.92            $0.00

  (c) Series 1995-3                         $2,501,272.05            $0.00

  (d) Class A                               $2,376,164.70            $0.00

      Class B                                 $125,107.35            $0.00
</TABLE>

<TABLE>
<CAPTION>
9.   Investor Losses This Due Period
     -------------------------------
                                                                Per $1,000 of
                                                               Original Invested
                                                    Total        Principal
  <S>                                              <C>            <C>
  (a) Group One                                     $0.00          $0.00

  (b) Group Two                                     $0.00          $0.00

  (c) Series 1995-3                                 $0.00          $0.00

  (d) Class A                                       $0.00          $0.00

      Class B                                       $0.00          $0.00
</TABLE>



<PAGE>   3



<TABLE>
<CAPTION>
10.  Reimbursement of Investor Losses This Due Period
     ------------------------------------------------          Per $1,000 of
                                                              Original Invested
                                                   Total          Principal
  <S>                                              <C>             <C>
  (a) Group One                                     $0.00          $0.00

  (b) Group Two                                     $0.00          $0.00

  (c) Series 1995-3                                 $0.00          $0.00

  (d) Class A                                       $0.00          $0.00

      Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
11.  Aggregate Amount of Unreimbursed Investor Losses
     ------------------------------------------------         Per $1,000 of
                                                            Original Invested
                                                   Total        Principal
  <S>                                               <C>            <C>
  (a) Group One                                     $0.00          $0.00

  (b) Group Two                                     $0.00          $0.00

  (c) Series 1995-3                                 $0.00          $0.00

  (d) Class A                                       $0.00          $0.00

      Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
     -------------------------------------------------------------------
  <S>                                                     <C>
  (a) Group One                                            $30,315,482.22

  (b) Group Two                                             $4,250,000.00

  (c) Series 1995-3                                           $877,193.33

  (d) Class A                                                 $833,333.33

      Class B                                                  $43,860.00
</TABLE>

<TABLE>
<CAPTION>
13.  Class Available Subordinated Amount at the end of the Due Period
     ----------------------------------------------------------------
                                                             As a Percentage
                                                               of Class A
                                                 Total       Invested Amount
     <S>                                     <C>              <C>
     Series 1995-3 Class B                   $57,894,760.00    11.5790%
</TABLE>

<TABLE>
<CAPTION>
14.  Total Available Credit Enhancement Amounts
     ------------------------------------------
                                             Shared Amount  Class B Amount
     <S>                                          <C>      <C>
     Maximum Amount                                $0.00   $31,578,960.00

     Available Amount                              $0.00   $31,578,960.00

     Amount of Drawings on Credit Enhancement
       for this Due Period                         $0.00            $0.00
</TABLE>


<PAGE>   4


<TABLE>
<CAPTION>
15.  Delinquency Summary
     -------------------
     End of Due Period Master Trust Receivables Outstanding  $26,675,706,815.58

                         Delinquent Amount  Percentage of Ending
     Payment Status      Ending Balance     Receivables Outstanding
     <S>              <C>                       <C>
     30-59 days         $628,092,799.56          2.35%

     60-179 days      $1,127,022,100.37          4.22%
</TABLE>


                                 U.S. BANK NATIONAL ASSOCIATION
                                 as Trustee


                              BY:
                                 ----------------------------------

                                        Vice President
<PAGE>   5

                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                        Series 1995-3 Monthly Statement

                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of September 28, 1995 (the "Series Supplement")
by and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1995-3 Master Trust Certificates for the Distribution Date
occurring on May 17, 1999:

<TABLE>
<S>                                                                           <C>
 1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.  The aggregate amount of Collections processed during the related Due
     Period is equal to                                                        $4,233,324,936.71

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                           $72,862,750.48

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                     $7,621,223.22

 6a. The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                    $0.00

 6b. The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                      $0.00

 7.  The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall                            $0.00
          is equal to

     (b)  with respect to the Class A Cumulative Investor Charged-Off                      $0.00
          Amount is equal to

     (c)  with respect to the Class A Investor Interest is equal to                        $0.00

 8.  The sum of all amounts payable to the Class A Certificateholders
     on the current Distribution Date is equal to                                  $2,282,777.78
</TABLE>


<PAGE>   6
<TABLE>
<S>                                                                              <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                            $3,836,293.56

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                       $401,264.70

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                    $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution
     date is equal to                                                                      $0.00

12.  The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall                            $0.00
          is equal to

     (b)  with respect to the Class B Cumulative Investor Charged-Off                      $0.00
          Amount is equal to

     (c)  with respect to the Class B Investor Interest is equal to                        $0.00

13.  The sum of all amounts payable to the Class B Certificateholders
     on the current Distribution Date is equal to                                    $122,954.20

14.  Attached hereto is a true copy of the statement required to be delivered
     by the Master Servicer on the date of this Certificate to the Trustee
     pursuant to Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 17th day of May, 1999.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              ------------------------------
                           Vice President, Chief Accounting Officer,
                           and Treasurer


<PAGE>   1

                                                                    EXHIBIT (J)



                    MONTHLY CERTIFICATEHOLDERS' STATEMENT
                         Discover Card Master Trust I
                       Series 1996-1 Monthly Statement
                     Class A Certificate CUSIP #25466KAU3
                     Class B Certificate CUSIP #25466KAV1

Trust Distribution Date: May 17, 1999        Due Period Ending:  April 30, 1999

Pursuant to the Series Supplement dated as of January 18, 1996 relating to
the Pooling and Servicing Agreement dated as of October  1, 1993 by and
between Greenwood Trust Company and U.S. Bank National Association, as
Trustee, the Trustee is required to prepare certain information each month
regarding current distributions to Certificateholders and the performances
of the Trust.  The information for the Due Period and the Trust
Distribution Date listed above is set forth below:

<TABLE>
<CAPTION>
1.        Payments for the benefit of Series Investors this Due Period (per $1000 of Class Initial Investor Interest)
          -----------------------------------------------------------------------------------------------------------

          Series  1996-1                                               Total             Interest          Principal
              <S>                                                 <C>                 <C>                 <C>
              Class A             32 days at 5.096250000%         $4.530000000        $4.530000000        $0.000000000

              Class B             32 days at 5.226250000%         $4.645555556        $4.645555556        $0.000000000
</TABLE>

<TABLE>
<CAPTION>
2.        Principal Receivables at the end of the Due Period
          --------------------------------------------------
     <S>                                                     <C>
     (a)  Aggregate Investor Interest                         $20,624,749,676.00
          Seller Interest                                      $5,632,195,899.94

          Total Master Trust                                  $26,256,945,575.94


     (b)  Group One Investor Interest                         $18,074,749,676.00

     (c)  Group Two Investor Interest                          $2,550,000,000.00

     (d)  Series 1996-1 Investor Interest                      $1,052,632,000.00

     (e)  Class A Investor Interest                            $1,000,000,000.00

          Class B Investor Interest                               $52,632,000.00
</TABLE>

<TABLE>
<CAPTION>
3.        Allocation of Receivables Collected During the Due Period
          ---------------------------------------------------------

                                                                        Finance Charge        Principal           Yield
                                                                         Collections         Collections        Collections
     <S>                                                                <C>                  <C>                <C>

     (a)  Allocation of Collections between Investor and Seller

          Aggregate Investor Allocation                                 $316,121,219.78      $3,022,278,825.29   $0.00

          Seller                                                         $84,742,614.59        $810,182,277.03   $0.00

     (b)  Group One Allocation                                          $277,252,259.81      $2,650,671,899.42   $0.00

     (c)  Group Two Allocation                                           $38,868,959.97        $371,606,925.87   $0.00

     (d)  Series 1996-1 Allocations                                      $16,044,574.97        $153,394,255.62   $0.00

     (e)  Class A Allocations                                            $15,242,446.44        $145,725,500.95   $0.00

          Class B Allocations                                               $802,128.53          $7,668,754.67   $0.00
</TABLE>

<PAGE>   2


<TABLE>
<CAPTION>
4.        Information Concerning the Series Principal Funding Accounts ("SPFA")
          ---------------------------------------------------------------------
                              Deposits into the
                               SPFAs This        SPFA    Deposit Deficit   Investment
                               Due Period       Balance    Amount           Income
          <S>                 <C>               <C>      <C>               <C>
          Series 1996-1           $0.00         $0.00            0.00           $0.00
</TABLE>

<TABLE>
<CAPTION>
5.        Information Concerning Amount of Controlled Liquidation Payments
          ----------------------------------------------------------------
                                                                          Total Payments
                                     Amount Paid      Deficit Amount      Through This
                                    This Due Period   This Due Period      Due Period
          <S>                       <C>               <C>                 <C>
          Series 1996-1                   $0.00                 $0.00              $0.00
</TABLE>

<TABLE>
<CAPTION>
6.        Information Concerning the Series Interest Funding Accounts ("SIFA")
          --------------------------------------------------------------------
                                                 Deposits Into the
                                                   SIFAs This
                                                   Due Period         SIFA Balance
          <S>                                    <C>                  <C>

          Series 1996-1                          $4,774,504.88             $0.00
</TABLE>

<TABLE>
<CAPTION>
7.        Pool Factors
          ------------
                                                                 This Due Period
          <S>                                                    <C>
          Class A                                                 1.00000000

          Class B                                                 1.00000000
</TABLE>

<TABLE>
<CAPTION>
8.        Investor Charged-Off Amount
          ---------------------------
                                                                       Cumulative
                                                                    Investor Charged-Off
                                                 This Due Period        Amount
     <S>                                       <C>                  <C>

     (a)  Group One                            $86,442,427.02                $0.00

     (b)  Group Two                            $12,118,664.92                $0.00

     (c)  Series 1996-1                         $5,002,419.10                $0.00

     (d)  Class A                               $4,752,329.39                $0.00

          Class B                                 $250,089.71                $0.00
</TABLE>

<TABLE>
<CAPTION>
9.        Investor Losses This Due Period
          -------------------------------
                                                                    Per $1,000 of
                                                                   Original Invested
                                                      Total          Principal
     <S>                                                <C>        <C>
     (a)  Group One                                     $0.00            $0.00

     (b)  Group Two                                     $0.00            $0.00

     (c)  Series 1996-1                                 $0.00            $0.00

     (d)  Class A                                       $0.00            $0.00

          Class B                                       $0.00            $0.00
</TABLE>

<PAGE>   3


<TABLE>
<CAPTION>
10.       Reimbursement of Investor Losses This Due Period
          ------------------------------------------------          Per $1,000 of
                                                                   Original Invested
                                                      Total          Principal
     <S>                                                <C>        <C>
     (a)  Group One                                     $0.00            $0.00

     (b)  Group Two                                     $0.00            $0.00

     (c)  Series 1996-1                                 $0.00            $0.00

     (d)  Class A                                       $0.00            $0.00

          Class B                                       $0.00            $0.00
</TABLE>

<TABLE>
<CAPTION>
11.       Aggregate Amount of Unreimbursed Investor Losses
          ------------------------------------------------          Per $1,000 of
                                                                   Original Invested
                                                      Total          Principal
     <S>                                                <C>          <C>
     (a)  Group One                                     $0.00            $0.00

     (b)  Group Two                                     $0.00            $0.00

     (c)  Series 1996-1                                 $0.00            $0.00

     (d)  Class A                                       $0.00            $0.00

          Class B                                       $0.00            $0.00
</TABLE>

<TABLE>
<CAPTION>
12.       Investor Monthly Servicing Fee Payable at the end of the Due Period
          -------------------------------------------------------------------
     <S>                                                       <C>
     (a)  Group One                                            $30,315,482.22

     (b)  Group Two                                             $4,250,000.00

     (c)  Series 1996-1                                         $1,754,386.67

     (d)  Class A                                               $1,666,666.67

          Class B                                                  $87,720.00
</TABLE>

<TABLE>
<CAPTION>
13.       Class Available Subordinated Amount at the end of the Due Period
          ----------------------------------------------------------------
                                                                    As a Percentage
                                                                      of Class A
                                                      Total         Invested Amount
          <S>                                    <C>                <C>
          Series 1996-1 Class B                  $105,263,200.00      10.5263%
</TABLE>

<TABLE>
<CAPTION>
14.       Total Available Credit Enhancement Amounts
          ------------------------------------------

                                                  Shared Amount    Class B Amount
          <S>                                     <C>              <C>

          Maximum Amount                                $0.00       $57,894,760.00

          Available Amount                              $0.00       $57,894,760.00

          Amount of Drawings on Credit Enhancement
            for this Due Period                         $0.00                $0.00
</TABLE>

<PAGE>   4





<TABLE>
<CAPTION>
15.       Delinquency Summary
          -------------------

          End of Due Period Master Trust Receivables Outstanding        $26,675,706,815.58

                              Delinquent Amount    Percentage of Ending
          Payment Status      Ending Balance       Receivables Outstanding
          <S>              <C>                     <C>
          30-59 days            $628,092,799.56          2.35%

          60-179 days         $1,127,022,100.37          4.22%
</TABLE>


                                      U.S. BANK NATIONAL ASSOCIATION
                                      as Trustee


                                   BY:
                                       ----------------------------
                                             Vice President





<PAGE>   5


                         MASTER SERVICER'S CERTIFICATE STATEMENT

                                   Discover Card Master Trust I

                                 Series 1996-1 Monthly Statement

                                       CREDIT CARD
                                PASS-THROUGH CERTIFICATES

          The undersigned, a duly authorized representative of Greenwood Trust
     Company ("Greenwood"), as Master Servicer pursuant to the Pooling &
     Servicing Agreement dated as of October 1, 1993 (the"Pooling & Servicing
     Agreement") and the Series Supplement, dated as of January 18, 1996 (the
     "Series Supplement") by and between Greenwood and U.S. Bank National
     Association, as Trustee, does hereby certify as follows with respect to
     the Supplement Discover Card Master Trust I, Series 1996-1 Master Trust
     Certificates for the Distribution Date occurring on May 17, 1999:

<TABLE>
     <S>                                                                               <C>
     1.   Greenwood is Master Servicer under the Pooling and Servicing Agreement.

     2.   The undersigned is a Servicing Officer of Greenwood as Master Servicer.

     3.   The aggregate amount of Collections processed during the related Due
          Period is equal to                                                           $4,233,324,936.71

     4.   The aggregate amount of Class A Principal Collections processed during
          the related Due Period is equal to                                             $145,725,500.95

     5.   The aggregate amount of Class A Finance Charge Collections processed
          during the related Due Period is equal to                                       $15,242,446.44

     6a.  The aggregate amount of Class A Principal Collections recharacterized as
          Series Yield Collections during the related Due Period is equal to                       $0.00

     6b.  The aggregate amount of Class A Additional Funds for this Distribution
          date is equal to                                                                         $0.00

      7.  The amount of drawings under the Credit Enhancement required to be
          made on the related Drawing Date pursuant to the Series Supplement:

          (a)  with respect to the Class A Required Amount Shortfall                               $0.00
               is equal to

          (b)  with respect to the Class A Cumulative Investor Charged-Off                         $0.00
               Amount is equal to

          (c)  with respect to the Class A Investor Interest is equal to                           $0.00

     8.   The sum of all amounts payable to the Class A Certificateholders
          on the current Distribution Date is equal to                                     $4,530,000.00
</TABLE>


<PAGE>   6



<TABLE>
    <S>                                                                                          <C>
     9.  The aggregate amount of Class B Principal Collections processed during
         the related Due Period is equal to                                                       $7,668,754.67

    10.  The aggregate amount of Class B Finance Charge Collections processed
         during the related Due Period is equal to                                                  $802,128.53

    11a. The aggregate amount of Class B Principal Collections recharacterized as
         Series Yield Collections during the related Due Period is equal to                               $0.00

    11b. The aggregate amount of Class B Additional Funds for this Distribution
         date is equal to                                                                                 $0.00

     12. The amount of drawings under the Credit Enhancement required to be
         made on the related Drawing Date pursuant to the Series Supplement:

         (a)  with respect to the Class B Required Amount Shortfall                                       $0.00
              is equal to

         (b)  with respect to the Class B Cumulative Investor Charged-Off                                 $0.00
              Amount is equal to

         (c)  with respect to the Class B Investor Interest is equal to                                   $0.00

    13.  The sum of all amounts payable to the Class B Certificateholders
         on the current Distribution Date is equal to                                               $244,504.88

    14.  Attached hereto is a true copy of the statement required to be delivered by
         the Master Servicer on the date of this Certificate to the Trustee pursuant to
         Section 16 of the Series Supplement.
</TABLE>

         IN WITNESS WHEREOF, the undersigned has duly executed and delivered
    certificate this  17th day of May, 1999.



                                GREENWOOD TRUST COMPANY
                                     as Master Servicer

                                By:
                                   ------------------------------
                                Vice President, Chief Accounting Officer,
                                and Treasurer



<PAGE>   1

                                                                    EXHIBIT (K)


                    MONTHLY CERTIFICATEHOLDERS' STATEMENT
                         Discover Card Master Trust I
                       Series 1996-2 Monthly Statement
                     Class A Certificate CUSIP #25466KAW9
                     Class B Certificate CUSIP #25466KAX7


Trust Distribution Date: May 17, 1999   Due Period Ending:  April 30, 1999

Pursuant to the Series Supplement dated as of January 29, 1996 relating to
the Pooling and Servicing Agreement dated as of October  1, 1993 by and
between Greenwood Trust Company and U.S. Bank National Association, as
Trustee, the Trustee is required to prepare certain information each month
regarding current distributions to Certificateholders and the performances
of the Trust.  The information for the Due Period and the Trust
Distribution Date listed above is set forth below:

<TABLE>
<CAPTION>
1.        Payments for the benefit of Series Investors this Due Period (per $1000 of Class Initial Investor Interest)
          -----------------------------------------------------------------------------------------------------------

          Series  1996-2                                          Total              Interest          Principal
              <S>                                             <C>                  <C>                <C>
              Class A      32 days at 5.146250000%            $4.574444444         $4.574444444       $0.000000000
                                                                  
              Class B      32 days at 5.286250000%            $4.698888889         $4.698888889       $0.000000000
</TABLE>

<TABLE>
<CAPTION>
2.        Principal Receivables at the end of the Due Period
          --------------------------------------------------
     <S>                                                    <C>
     (a)  Aggregate Investor Interest                        $20,624,749,676.00
          Seller Interest                                     $5,632,195,899.94

          Total Master Trust                                 $26,256,945,575.94


     (b)  Group One Investor Interest                        $18,074,749,676.00

     (c)  Group Two Investor Interest                         $2,550,000,000.00

     (d)  Series 1996-2 Investor Interest                       $947,369,000.00

     (e)  Class A Investor Interest                             $900,000,000.00

          Class B Investor Interest                              $47,369,000.00
</TABLE>

<TABLE>
<CAPTION>
3.        Allocation of Receivables Collected During the Due Period
          ----------------------------------------------------------

                                                                         Finance Charge           Principal                Yield
                                                                          Collections            Collections             Collections
     <S>                                                                <C>                    <C>                       <C>
     (a)  Allocation of Collections between Investor and Seller   
                                                                  
          Aggregate Investor Allocation                                 $316,121,219.78       $3,022,278,825.29            $0.00
                                                                  
          Seller                                                         $84,742,614.59         $810,182,277.03            $0.00
                                                                  
     (b)  Group One Allocation                                          $277,252,259.81       $2,650,671,899.42            $0.00
                                                                  
     (c)  Group Two Allocation                                           $38,868,959.97         $371,606,925.87            $0.00
                                                                  
     (d)  Series 1996-2 Allocations                                      $14,440,317.91         $138,056,746.29            $0.00
                                                                  
     (e)  Class A Allocations                                            $13,718,362.14         $131,154,483.84            $0.00
                                                                  
          Class B Allocations                                               $721,955.77           $6,902,262.45            $0.00

</TABLE>


<PAGE>   2


<TABLE>
<CAPTION>
4.        Information Concerning the Series Principal Funding Accounts ("SPFA")
          ---------------------------------------------------------------------
                              Deposits into the
                               SPFAs This          SPFA     Deposit Deficit   Investment
                               Due Period         Balance     Amount           Income
          <S>                 <C>                <C>        <C>               <C>
          Series 1996-2           $0.00           $0.00          0.00           $0.00
</TABLE>

<TABLE>
<CAPTION>
5.        Information Concerning Amount of Controlled Liquidation Payments
          ----------------------------------------------------------------
                                                                        Total Payments
                                   Amount Paid       Deficit Amount     Through This
                                  This Due Period    This Due Period     Due Period
          <S>                     <C>                <C>                <C>
          Series 1996-2                 $0.00               $0.00               $0.00
</TABLE>

<TABLE>
<CAPTION>
6.        Information Concerning the Series Interest Funding Accounts ("SIFA")
          --------------------------------------------------------------------
                                                 Deposits Into the
                                                   SIFAs This
                                                   Due Period         SIFA Balance
          <S>                                   <C>                   <C>
          Series 1996-2                         $4,339,581.67                  $0.00
</TABLE>

<TABLE>
<CAPTION>
7.        Pool Factors
          ------------
                                                                 This Due Period
          <S>                                                    <C>
          Class A                                                 1.00000000

          Class B                                                 1.00000000
</TABLE>

<TABLE>
<CAPTION>
8.        Investor Charged-Off Amount
          ---------------------------                                       Cumulative
                                                                       Investor Charged-Off
                                                 This Due Period              Amount
     <S>                                       <C>                     <C>
     (a)  Group One                            $86,442,427.02                 $0.00

     (b)  Group Two                            $12,118,664.92                 $0.00

     (c)  Series 1996-2                         $4,502,239.68                 $0.00

     (d)  Class A                               $4,277,146.44                 $0.00

          Class B                                 $225,093.24                 $0.00
</TABLE>

<TABLE>
<CAPTION>
9.        Investor Losses This Due Period
          -------------------------------                            Per $1,000 of
                                                                   Original Invested
                                                      Total            Principal
     <S>                                              <C>          <C>
     (a)  Group One                                     $0.00            $0.00

     (b)  Group Two                                     $0.00            $0.00

     (c)  Series 1996-2                                 $0.00            $0.00

     (d)  Class A                                       $0.00            $0.00

          Class B                                       $0.00            $0.00
</TABLE>


<PAGE>   3

<TABLE>
<CAPTION>
10.       Reimbursement of Investor Losses This Due Period
          ------------------------------------------------         Per $1,000 of
                                                                  Original Invested
                                                      Total           Principal
     <S>                                              <C>         <C>
     (a)  Group One                                     $0.00          $0.00

     (b)  Group Two                                     $0.00          $0.00

     (c)  Series 1996-2                                 $0.00          $0.00

     (d)  Class A                                       $0.00          $0.00

          Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
11.       Aggregate Amount of Unreimbursed Investor Losses
          ------------------------------------------------         Per $1,000 of
                                                                 Original Invested
                                                      Total          Principal
     <S>                                              <C>         <C>
     (a)  Group One                                     $0.00          $0.00

     (b)  Group Two                                     $0.00          $0.00

     (c)  Series 1996-2                                 $0.00          $0.00

     (d)  Class A                                       $0.00          $0.00

          Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
12.       Investor Monthly Servicing Fee Payable at the end of the Due Period
          -------------------------------------------------------------------
     <S>                                                       <C>
     (a)  Group One                                            $30,315,482.22

     (b)  Group Two                                             $4,250,000.00

     (c)  Series 1996-2                                         $1,578,948.33

     (d)  Class A                                               $1,500,000.00

          Class B                                                  $78,948.33
</TABLE>

<TABLE>
<CAPTION>
13.       Class Available Subordinated Amount at the end of the Due Period
          ----------------------------------------------------------------
                                                                    As a Percentage
                                                                      of Class A
                                                    Total           Invested Amount
          <S>                                  <C>                  <C>
          Series 1996-2 Class B                $104,210,590.00        11.5790%
</TABLE>

<TABLE>
<CAPTION>
14.       Total Available Credit Enhancement Amounts
          ------------------------------------------

                                                        Shared Amount    Class B Amount
          <S>                                           <C>               <C>
          Maximum Amount                                      $0.00        $56,842,140.00

          Available Amount                                    $0.00        $56,842,140.00

          Amount of Drawings on Credit Enhancement
            for this Due Period                               $0.00                 $0.00
</TABLE>





<PAGE>   4


<TABLE>
<CAPTION>
15.       Delinquency Summary
          -------------------

          End of Due Period Master Trust Receivables Outstanding        $26,675,706,815.58

                              Delinquent Amount      Percentage of Ending
          Payment Status      Ending Balance         Receivables Outstanding
          <S>                 <C>                    <C>
          30-59 days            $628,092,799.56              2.35%

          60-179 days         $1,127,022,100.37              4.22%
</TABLE>


                                      U.S. BANK NATIONAL ASSOCIATION
                                      as Trustee


                                   BY:
                                       ----------------------------
                                             Vice President








<PAGE>   5




                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                        Series 1996-2 Monthly Statement

                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of January 29, 1996 (the "Series Supplement")
by and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1996-2 Master Trust Certificates for the Distribution Date
occurring on May 17, 1999:

<TABLE>
<S>                                                                             <C>
1.   Greenwood is Master Servicer under the Pooling and Servicing Agreement.

2.   The undersigned is a Servicing Officer of Greenwood as Master Servicer.

3.   The aggregate amount of Collections processed during the related Due
     Period is equal to                                                          $4,233,324,936.71

4.   The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                            $131,154,483.84

5.   The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                      $13,718,362.14

6a.  The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                      $0.00

6b.  The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                        $0.00

 7.  The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall                              $0.00
          is equal to

     (b)  with respect to the Class A Cumulative Investor Charged-Off                        $0.00
          Amount is equal to

     (c)  with respect to the Class A Investor Interest is equal to                          $0.00

8.   The sum of all amounts payable to the Class A Certificateholders
     on the current Distribution Date is equal to                                    $4,117,000.00
</TABLE>





<PAGE>   6


<TABLE>
<S>                                                                               <C>
 9.   The aggregate amount of Class B Principal Collections processed during
      the related Due Period is equal to                                           $6,902,262.45

10.   The aggregate amount of Class B Finance Charge Collections processed
      during the related Due Period is equal to                                      $721,955.77

11a.  The aggregate amount of Class B Principal Collections recharacterized as
      Series Yield Collections during the related Due Period is equal to                   $0.00

11b.  The aggregate amount of Class B Additional Funds for this Distribution
      date is equal to                                                                     $0.00

 12.  The amount of drawings under the Credit Enhancement required to be
      made on the related Drawing Date pursuant to the Series Supplement:

      (a)  with respect to the Class B Required Amount Shortfall                           $0.00
           is equal to

      (b)  with respect to the Class B Cumulative Investor Charged-Off                     $0.00
           Amount is equal to

      (c)  with respect to the Class B Investor Interest is equal to                       $0.00

13.   The sum of all amounts payable to the Class B Certificateholders
      on the current Distribution Date is equal to                                   $222,581.67

14.   Attached hereto is a true copy of the statement required to be delivered by
      the Master Servicer on the date of this Certificate to the Trustee pursuant to
      Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this  17th day of May, 1999.



                                GREENWOOD TRUST COMPANY
                                     as Master Servicer

                                By:
                                   ------------------------------
                                Vice President, Chief Accounting Officer,
                                and Treasurer






<PAGE>   1
                                                                     EXHIBIT (L)

                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1996-3 Monthly Statement
                      Class A Certificate CUSIP #25466KAY5
                      Class B Certificate CUSIP #25466KAZ2


Trust Distribution Date: May 17, 1999        Due Period Ending:  April 30, 1999

Pursuant to the Series Supplement dated as of February 21, 1996 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<CAPTION>
     1.   Payments for the benefit of Series Investors this Due Period (per $1000 of Class Initial Investor Interest)
          -----------------------------------------------------------------------------------------------------------

          Series  1996-3                                           Total               Interest                Principal
              <S>                                             <C>                   <C>                     <C>         
              Class A      30 days at 6.050000000%            $5.041666667          $5.041666667            $0.000000000

              Class B      30 days at 6.250000000%            $5.208333333          $5.208333333            $0.000000000
</TABLE>

<TABLE>
<CAPTION>
     2.     Principal Receivables at the end of the Due Period
            --------------------------------------------------

<S>                                                          <C>               
       (a)  Aggregate Investor Interest                        $20,624,749,676.00

            Seller Interest                                     $5,632,195,899.94

            Total Master Trust                                 $26,256,945,575.94


       (b)  Group One Investor Interest                        $18,074,749,676.00

       (c)  Group Two Investor Interest                         $2,550,000,000.00

       (d)  Series 1996-3 Investor Interest                       $631,579,000.00

       (e)  Class A Investor Interest                             $600,000,000.00

            Class B Investor Interest                              $31,579,000.00
</TABLE>

<TABLE>
<CAPTION>
     3.     Allocation of Receivables Collected During the Due Period
            ---------------------------------------------------------

                                                                        Finance Charge          Principal              Yield
                                                                          Collections          Collections          Collections

<S>                                                                      <C>                 <C>                       <C>  
       (a)  Allocation of Collections between Investor and Seller

            Aggregate Investor Allocation                                $316,121,219.78     $3,022,278,825.29         $0.00

            Seller                                                        $84,742,614.59       $810,182,277.03         $0.00

       (b)  Group One Allocation                                         $277,252,259.81     $2,650,671,899.42         $0.00

       (c)  Group Two Allocation                                          $38,868,959.97       $371,606,925.87         $0.00

       (d)  Series 1996-3 Allocations                                      $9,627,145.84        $92,040,385.83         $0.00

       (e)  Class A Allocations                                            $9,145,708.38        $87,437,600.05         $0.00

            Class B Allocations                                              $481,437.46         $4,602,785.78         $0.00
</TABLE>


<PAGE>   2



<TABLE>
<CAPTION>
     4.   Information Concerning the Series Principal Funding Accounts ("SPFA")
          ---------------------------------------------------------------------

                              Deposits into the
                               SPFAs This        SPFA    Deposit Deficit  Investment
                               Due Period       Balance    Amount          Income

          <S>                     <C>           <C>           <C>          <C>  
          Series 1996-3           $0.00         $0.00         0.00         $0.00
</TABLE>

<TABLE>
<CAPTION>
     5.   Information Concerning Amount of Controlled Liquidation Payments
          ----------------------------------------------------------------
                                                                     Total Payments
                                   Amount Paid     Deficit Amount     Through This
                                  This Due Period  This Due Period     Due Period

          <S>                         <C>              <C>               <C>  
          Series 1996-3                 $0.00            $0.00             $0.00
</TABLE>

<TABLE>
<CAPTION>
     6.   Information Concerning the Series Interest Funding Accounts ("SIFA")
          --------------------------------------------------------------------

                                                 Deposits Into the
                                                   SIFAs This
                                                   Due Period     SIFA Balance

          <S>                                   <C>              <C>          
          Series 1996-3                         $3,189,473.96    $9,568,421.88
</TABLE>

<TABLE>
<CAPTION>
     7.   Pool Factors
          ------------
                                                                 This Due Period
<S>                                                               <C>       
          Class A                                                 1.00000000

          Class B                                                 1.00000000
</TABLE>

<TABLE>
<CAPTION>
     8.     Investor Charged-Off Amount
            ---------------------------
                                                                      Cumulative
                                                                  Investor Charged-Off
                                              This Due Period           Amount
<S>                                            <C>                       <C>  
       (a)  Group One                            $86,442,427.02            $0.00

       (b)  Group Two                            $12,118,664.92            $0.00

       (c)  Series 1996-3                         $3,001,576.44            $0.00

       (d)  Class A                               $2,851,472.62            $0.00

            Class B                                 $150,103.82            $0.00
</TABLE>

<TABLE>
<CAPTION>
     9.     Investor Losses This Due Period
            -------------------------------
                                                                  Per $1,000 of
                                                                 Original Invested
                                                      Total        Principal

<S>                                                     <C>            <C>  
       (a)  Group One                                     $0.00          $0.00

       (b)  Group Two                                     $0.00          $0.00

       (c)  Series 1996-3                                 $0.00          $0.00

       (d)  Class A                                       $0.00          $0.00

            Class B                                       $0.00          $0.00
</TABLE>




<PAGE>   3


<TABLE>
<CAPTION>
     10.  Reimbursement of Investor Losses This Due Period
          ------------------------------------------------        Per $1,000 of
                                                                 Original Invested
                                                      Total        Principal
<S>                                                     <C>            <C>  
       (a)  Group One                                     $0.00          $0.00

       (b)  Group Two                                     $0.00          $0.00

       (c)  Series 1996-3                                 $0.00          $0.00

       (d)  Class A                                       $0.00          $0.00

            Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
11.  Aggregate Amount of Unreimbursed Investor Losses
      ------------------------------------------------              Per $1,000 of
                                                                 Original Invested
                                                      Total          Principal
<S>                                                       <C>            <C>  
       (a)  Group One                                     $0.00          $0.00

       (b)  Group Two                                     $0.00          $0.00

       (c)  Series 1996-3                                 $0.00          $0.00

       (d)  Class A                                       $0.00          $0.00

            Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
     12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
          -------------------------------------------------------------------

<S>                                                              <C>           
       (a)  Group One                                            $30,315,482.22

       (b)  Group Two                                             $4,250,000.00

       (c)  Series 1996-3                                         $1,052,631.67

       (d)  Class A                                               $1,000,000.00

            Class B                                                  $52,631.67
</TABLE>

<TABLE>
<CAPTION>
     13.  Class Available Subordinated Amount at the end of the Due Period
          ----------------------------------------------------------------

                                                                  As a Percentage
                                                                    of Class A
                                                      Total       Invested Amount
<S>                                               <C>                <C>    
          Series 1996-3 Class B                   $37,894,740.00     6.3158%
</TABLE>

<TABLE>
<CAPTION>
     14.  Total Available Credit Enhancement Amounts
          ------------------------------------------

                                                  Shared Amount  Class B Amount
<S>                                                     <C>     <C>           
          Maximum Amount                                $0.00   $18,947,370.00

          Available Amount                              $0.00   $18,947,370.00

          Amount of Drawings on Credit Enhancement
            for this Due Period                         $0.00            $0.00
</TABLE>



<PAGE>   4


<TABLE>
<CAPTION>
     15.  Delinquency Summary
          -------------------

          End of Due Period Master Trust Receivables Outstanding      $26,675,706,815.58

                              Delinquent Amount  Percentage of Ending
          Payment Status      Ending Balance     Receivables Outstanding

          <S>              <C>                      <C>  
          30-59 days         $628,092,799.56          2.35%

          60-179 days      $1,127,022,100.37          4.22%
</TABLE>


                                      U.S. BANK NATIONAL ASSOCIATION
                                      as Trustee


                                   BY:
                                       ----------------------------

                                             Vice President




<PAGE>   5



                     MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1996-3 Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of February 21, 1996 (the "Series Supplement")
by and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1996-3 Master Trust Certificates for the Distribution Date
occurring on May 17, 1999:


<TABLE>
<S>                                                                                      <C>              
      1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

      2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

      3.  The aggregate amount of Collections processed during the related Due
          Period is equal to                                                             $4,233,324,936.71

      4.  The aggregate amount of Class A Principal Collections processed during
          the related Due Period is equal to                                                $87,437,600.05

      5.  The aggregate amount of Class A Finance Charge Collections processed
          during the related Due Period is equal to                                          $9,145,708.38

      6a. The aggregate amount of Class A Principal Collections recharacterized as
          Series Yield Collections during the related Due Period is equal to                         $0.00

      6b. The aggregate amount of Class A Additional Funds for this Distribution
          date is equal to                                                                           $0.00

       7.  The amount of drawings under the Credit Enhancement required to be
           made on the related Drawing Date pursuant to the Series Supplement:

           (a)  with respect to the Class A Required Amount Shortfall                                $0.00
                is equal to

           (b)  with respect to the Class A Cumulative Investor Charged-Off                          $0.00
                Amount is equal to

           (c)  with respect to the Class A Investor Interest is equal to                            $0.00

      8.  The sum of all amounts payable to the Class A Certificateholders
          on the current Distribution Date is equal to                                               $0.00
</TABLE>


<PAGE>   6



<TABLE>
<S>                                                                                      <C>              
      9.  The aggregate amount of Class B Principal Collections processed during
          the related Due Period is equal to                                                 $4,602,785.78

     10.  The aggregate amount of Class B Finance Charge Collections processed
          during the related Due Period is equal to                                            $481,437.46

     11a. The aggregate amount of Class B Principal Collections recharacterized as
          Series Yield Collections during the related Due Period is equal to                         $0.00

     11b. The aggregate amount of Class B Additional Funds for this Distribution
          date is equal to                                                                           $0.00

      12.  The amount of drawings under the Credit Enhancement required to be
           made on the related Drawing Date pursuant to the Series Supplement:

           (a)  with respect to the Class B Required Amount Shortfall                                $0.00
                is equal to

           (b)  with respect to the Class B Cumulative Investor Charged-Off                          $0.00
                Amount is equal to

           (c)  with respect to the Class B Investor Interest is equal to                            $0.00

     13.  The sum of all amounts payable to the Class B Certificateholders
          on the current Distribution Date is equal to                                               $0.00

     14.  Attached hereto is a true copy of the statement required to be delivered by
          the Master Servicer on the date of this Certificate to the Trustee pursuant to
          Section 16 of the Series Supplement.

          IN WITNESS WHEREOF, the undersigned has duly executed and delivered
     certificate this 17th day of May, 1999.
</TABLE>



                                GREENWOOD TRUST COMPANY
                                     as Master Servicer

                                By:
                                   -------------------------
                                Vice President, Chief Accounting Officer,
                                and Treasurer

<PAGE>   1

                                                                     EXHIBIT (M)



                         MONTHLY CERTIFICATEHOLDERS' STATEMENT
                             Discover Card Master Trust I
                            Series 1996-4 Monthly Statement
                        Class A Certificate CUSIP #25466KBA6
                        Class B Certificate CUSIP #25466KBB4


Trust Distribution Date: May 17, 1999       Due Period Ending:  April 30, 1999

Pursuant to the Series Supplement dated as of April 30, 1996 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<CAPTION>
     1.   Payments for the benefit of Series Investors this Due Period (per $1000 of Class Initial Investor Interest)
          -----------------------------------------------------------------------------------------------------------

          Series  1996-4                                     Total          Interest           Principal
              <S>                                        <C>              <C>                <C>
              Class A      32 days at 5.301250000%       $4.712222222     $4.712222222       $0.000000000

              Class B      32 days at 5.476250000%       $4.867777778     $4.867777778       $0.000000000
</TABLE>

<TABLE>
<CAPTION>
     2.   Principal Receivables at the end of the Due Period
          --------------------------------------------------

<S>                                                            <C>               
       (a)  Aggregate Investor Interest                        $20,624,749,676.00

            Seller Interest                                     $5,632,195,899.94

            Total Master Trust                                 $26,256,945,575.94


       (b)  Group One Investor Interest                        $18,074,749,676.00

       (c)  Group Two Investor Interest                         $2,550,000,000.00

       (d)  Series 1996-4 Investor Interest                     $1,052,632,000.00

       (e)  Class A Investor Interest                           $1,000,000,000.00

            Class B Investor Interest                              $52,632,000.00
</TABLE>

<TABLE>
<CAPTION>
     3.   Allocation of Receivables Collected During the Due Period
          ---------------------------------------------------------

                                                                      Finance Charge           Principal            Yield
                                                                        Collections           Collections         Collections
<S>                                                                   <C>                   <C>                       <C>  
       (a)  Allocation of Collections between Investor and Seller
            Aggregate Investor Allocation                             $316,121,219.78       $3,022,278,825.29         $0.00

            Seller                                                     $84,742,614.59         $810,182,277.03         $0.00

       (b)  Group One Allocation                                      $277,252,259.81       $2,650,671,899.42         $0.00

       (c)  Group Two Allocation                                       $38,868,959.97         $371,606,925.87         $0.00

       (d)  Series 1996-4 Allocations                                  $16,044,574.97         $153,394,255.62         $0.00

       (e)  Class A Allocations                                        $15,242,446.44         $145,725,500.95         $0.00

            Class B Allocations                                           $802,128.53           $7,668,754.67         $0.00
</TABLE>



<PAGE>   2


<TABLE>
<CAPTION>
     4.   Information Concerning the Series Principal Funding Accounts ("SPFA")
          ---------------------------------------------------------------------
                              Deposits into the
                               SPFAs This        SPFA    Deposit Deficit Investment
                               Due Period       Balance    Amount         Income

<S>                               <C>           <C>           <C>          <C>  
          Series 1996-4           $0.00         $0.00         0.00         $0.00
</TABLE>

<TABLE>
<CAPTION>
     5.   Information Concerning Amount of Controlled Liquidation Payments
          ----------------------------------------------------------------

                                                                   Total Payments
                                   Amount Paid    Deficit Amount   Through This
                                  This Due Period This Due Period   Due Period

<S>                                   <C>              <C>               <C>  
          Series 1996-4                 $0.00            $0.00             $0.00
</TABLE>

<TABLE>
<CAPTION>
     6.   Information Concerning the Series Interest Funding Accounts ("SIFA")
          --------------------------------------------------------------------

                                                 Deposits Into the
                                                   SIFAs This
                                                   Due Period     SIFA Balance

<S>                                             <C>                      <C>  
          Series 1996-4                         $4,968,423.10            $0.00
</TABLE>

<TABLE>
<CAPTION>
     7.   Pool Factors
          ------------
                                                                 This Due Period
<S>                                                               <C>       
          Class A                                                 1.00000000

          Class B                                                 1.00000000
</TABLE>

<TABLE>
<CAPTION>
     8.   Investor Charged-Off Amount
          ---------------------------
                                                                      Cumulative
                                                                  Investor Charged-Off
                                                 This Due Period        Amount

<S>                                              <C>                       <C>  
       (a)  Group One                            $86,442,427.02            $0.00

       (b)  Group Two                            $12,118,664.92            $0.00

       (c)  Series 1996-4                         $5,002,419.10            $0.00

       (d)  Class A                               $4,752,329.39            $0.00

            Class B                                 $250,089.71            $0.00
</TABLE>

<TABLE>
<CAPTION>
     9.   Investor Losses This Due Period
                                                                  Per $1,000 of
                                                                 Original Invested
                                                      Total        Principal

<S>                                                     <C>            <C>  
       (a)  Group One                                     $0.00          $0.00

       (b)  Group Two                                     $0.00          $0.00

       (c)  Series 1996-4                                 $0.00          $0.00

       (d)  Class A                                       $0.00          $0.00

            Class B                                       $0.00          $0.00
</TABLE>




<PAGE>   3





<TABLE>
<CAPTION>
                                                                
       10.  Reimbursement of Investor Losses This Due Period
            ------------------------------------------------      Per $1,000 of
                                                                 Original Invested
                                                      Total        Principal

<S>                                                       <C>            <C>  
       (a)  Group One                                     $0.00          $0.00

       (b)  Group Two                                     $0.00          $0.00

       (c)  Series 1996-4                                 $0.00          $0.00

       (d)  Class A                                       $0.00          $0.00

            Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
                                                          
       11.  Aggregate Amount of Unreimbursed Investor Losses
            ------------------------------------------------       Per $1,000 of
                                                                 Original Invested
                                                      Total         Principal

<S>                                                       <C>            <C>  
       (a)  Group One                                     $0.00          $0.00

       (b)  Group Two                                     $0.00          $0.00

       (c)  Series 1996-4                                 $0.00          $0.00

       (d)  Class A                                       $0.00          $0.00

            Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
       12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
            -------------------------------------------------------------------

<S>                                                              <C>           
       (a)  Group One                                            $30,315,482.22

       (b)  Group Two                                             $4,250,000.00

       (c)  Series 1996-4                                         $1,754,386.67

       (d)  Class A                                               $1,666,666.67

            Class B                                                  $87,720.00
</TABLE>

<TABLE>
<CAPTION>
     13.  Class Available Subordinated Amount at the end of the Due Period
          ----------------------------------------------------------------
                                                                  As a Percentage
                                                                    of Class A
                                                      Total       Invested Amount
<S>                                              <C>                <C>     
          Series 1996-4 Class B                  $115,789,520.00    11.5790%
</TABLE>

<TABLE>
<CAPTION>
     14.  Total Available Credit Enhancement Amounts
          ------------------------------------------

                                                  Shared Amount  Class B Amount
<S>                                                     <C>     <C>           
          Maximum Amount                                $0.00   $63,157,920.00

          Available Amount                              $0.00   $63,157,920.00

          Amount of Drawings on Credit Enhancement
            for this Due Period                         $0.00            $0.00
</TABLE>




<PAGE>   4





<TABLE>
<CAPTION>
     15.  Delinquency Summary
          -------------------

          End of Due Period Master Trust Receivables Outstanding      $26,675,706,815.58

                              Delinquent Amount  Percentage of Ending
          Payment Status      Ending Balance     Receivables Outstanding

<S>                          <C>                      <C>  
          30-59 days             $628,092,799.56          2.35%
                                                               
          60-179 days          $1,127,022,100.37          4.22%
</TABLE>


                                      U.S. BANK NATIONAL ASSOCIATION
                                      as Trustee


                                   BY:
                                       ----------------------------

                                             Vice President




<PAGE>   5




                     MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1996-4 Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

          The undersigned, a duly authorized representative of Greenwood Trust
     Company ("Greenwood"), as Master Servicer pursuant to the Pooling &
     Servicing Agreement dated as of October 1, 1993 (the"Pooling & Servicing
     Agreement") and the Series Supplement, dated as of April 30, 1996 (the
     "Series Supplement") by and between Greenwood and U.S. Bank National
     Association, as Trustee, does hereby certify as follows with respect to the
     Supplement Discover Card Master Trust I, Series 1996-4 Master Trust
     Certificates for the Distribution Date occurring on May 17, 1999:


<TABLE>
<S>                                                                                      <C>              
      1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

      2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

      3.  The aggregate amount of Collections processed during the related Due
          Period is equal to                                                             $4,233,324,936.71

      4.  The aggregate amount of Class A Principal Collections processed during
          the related Due Period is equal to                                               $145,725,500.95

      5.  The aggregate amount of Class A Finance Charge Collections processed
          during the related Due Period is equal to                                         $15,242,446.44

      6a. The aggregate amount of Class A Principal Collections recharacterized as
          Series Yield Collections during the related Due Period is equal to                         $0.00

      6b. The aggregate amount of Class A Additional Funds for this Distribution
          date is equal to                                                                           $0.00

       7.  The amount of drawings under the Credit Enhancement required to be
           made on the related Drawing Date pursuant to the Series Supplement:

           (a)  with respect to the Class A Required Amount Shortfall                                $0.00
                is equal to

           (b)  with respect to the Class A Cumulative Investor Charged-Off                          $0.00
                Amount is equal to

           (c)  with respect to the Class A Investor Interest is equal to                            $0.00

      8.  The sum of all amounts payable to the Class A Certificateholders
          on the current Distribution Date is equal to                                       $4,712,222.22
</TABLE>


<PAGE>   6





<TABLE>
<S>                                                                                      <C>              

      9.  The aggregate amount of Class B Principal Collections processed during
          the related Due Period is equal to                                                 $7,668,754.67

     10.  The aggregate amount of Class B Finance Charge Collections processed
          during the related Due Period is equal to                                            $802,128.53

     11a. The aggregate amount of Class B Principal Collections recharacterized as
          Series Yield Collections during the related Due Period is equal to                         $0.00

     11b. The aggregate amount of Class B Additional Funds for this Distribution
          date is equal to                                                                           $0.00

      12. The amount of drawings under the Credit Enhancement required to be
          made on the related Drawing Date pursuant to the Series Supplement:

          (a)  with respect to the Class B Required Amount Shortfall                                 $0.00
               is equal to

          (b)  with respect to the Class B Cumulative Investor Charged-Off                           $0.00
               Amount is equal to

          (c)  with respect to the Class B Investor Interest is equal to                             $0.00

     13.  The sum of all amounts payable to the Class B Certificateholders
          on the current Distribution Date is equal to                                         $256,200.88

     14.  Attached hereto is a true copy of the statement required to be delivered by
          the Master Servicer on the date of this Certificate to the Trustee pursuant to
          Section 16 of the Series Supplement.

          IN WITNESS WHEREOF, the undersigned has duly executed and delivered
      certificate this  17th day of May, 1999.
</TABLE>



                                GREENWOOD TRUST COMPANY
                                     as Master Servicer

                                By:
                                   -------------------------
                                Vice President, Chief Accounting Officer,
                                and Treasurer





<PAGE>   1
                                                                   EXHIBIT (N)



                    MONTHLY CERTIFICATEHOLDERS' STATEMENT
                        Discover Card Master Trust I
                       Series 1997-1 Monthly Statement
                   Class A Certificate CUSIP #25466KBD0
                   Class B Certificate CUSIP #25466KBE8


Trust Distribution Date: May 17, 1999         Due Period Ending:  April 30, 1999

Pursuant to the Series Supplement dated as of August 26, 1997 relating to the
Pooling and Servicing Agreement dated as of October  1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust.  The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<CAPTION>
1.   Payments for the benefit of Series Investors this Due Period (per $1000 of Class Initial Investor Interest)
     -----------------------------------------------------------------------------------------------------------

     Series  1997-1                                  Total          Interest          Principal
         <S>                                     <C>              <C>               <C>
         Class A      32 days at 5.016250000%    $4.458888889     $4.458888889      $0.000000000

         Class B      32 days at 5.196250000%    $4.618888889     $4.618888889      $0.000000000
</TABLE>

<TABLE>
<CAPTION>
2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------
  <S>                                                   <C>
  (a) Aggregate Investor Interest                        $20,624,749,676.00

      Seller Interest                                     $5,632,195,899.94

      Total Master Trust                                 $26,256,945,575.94


  (b) Group One Investor Interest                        $18,074,749,676.00

  (c) Group Two Investor Interest                         $2,550,000,000.00

  (d) Series 1997-1 Investor Interest                       $789,474,000.00

  (e) Class A Investor Interest                             $750,000,000.00

      Class B Investor Interest                              $39,474,000.00
</TABLE>

<TABLE>
<CAPTION>
3.   Allocation of Receivables Collected During the Due Period
     ---------------------------------------------------------

                                                                 Finance Charge             Principal          Yield
                                                                  Collections              Collections       Collections
  <S>                                                            <C>                    <C>                          <C>
  (a) Allocation of Collections between Investor and Seller

      Aggregate Investor Allocation                              $316,121,219.78        $3,022,278,825.29            $0.00

      Seller                                                      $84,742,614.59          $810,182,277.03            $0.00

  (b) Group One Allocation                                       $277,252,259.81        $2,650,671,899.42            $0.00

  (c) Group Two Allocation                                        $38,868,959.97          $371,606,925.87            $0.00

  (d) Series 1997-1 Allocations                                   $12,033,531.44          $115,046,649.83            $0.00

  (e) Class A Allocations                                         $11,431,834.83          $109,294,125.72            $0.00

      Class B Allocations                                            $601,696.61            $5,752,524.11            $0.00
</TABLE>
<PAGE>   2

<TABLE>
<CAPTION>
4.   Information Concerning the Series Principal Funding Accounts ("SPFA")
     ---------------------------------------------------------------------
                        Deposits into the
                           SPFAs This         SPFA      Deposit Deficit     Investment
                           Due Period        Balance        Amount            Income
     <S>                     <C>             <C>             <C>              <C>
     Series 1997-1           $0.00           $0.00           0.00             $0.00
</TABLE>

<TABLE>
<CAPTION>
5.   Information Concerning Amount of Controlled Liquidation Payments
     ----------------------------------------------------------------
                                                                           Total Payments
                              Amount Paid           Deficit Amount         Through This
                             This Due Period        This Due Period         Due Period
     <S>                           <C>                    <C>                  <C>
     Series 1997-1                 $0.00                  $0.00                $0.00
</TABLE>

<TABLE>
<CAPTION>
6.   Information Concerning the Series Interest Funding Accounts ("SIFA")
     --------------------------------------------------------------------
                                           Deposits Into the
                                              SIFAs This
                                              Due Period            SIFA Balance
     <S>                                   <C>                             <C>
     Series 1997-1                         $3,526,492.69                   $0.00
</TABLE>

<TABLE>
<CAPTION>
7.   Pool Factors
     ------------
                                                           This Due Period
     <S>                                                     <C>
     Class A                                                 1.00000000

     Class B                                                 1.00000000
</TABLE>

<TABLE>
<CAPTION>
8.   Investor Charged-Off Amount
     ---------------------------
                                                                Cumulative
                                                           Investor Charged-Off
                                        This Due Period          Amount
  <S>                                      <C>                       <C>
  (a) Group One                            $86,442,427.02            $0.00

  (b) Group Two                            $12,118,664.92            $0.00

  (c) Series 1997-1                         $3,751,845.57            $0.00

  (d) Class A                               $3,564,247.04            $0.00

      Class B                                 $187,598.53            $0.00
</TABLE>

<TABLE>
<CAPTION>
9.   Investor Losses This Due Period
     -------------------------------
                                                              Per $1,000 of
                                                            Original Invested
                                                 Total         Principal
  <S>                                               <C>            <C>
  (a) Group One                                     $0.00          $0.00

  (b) Group Two                                     $0.00          $0.00

  (c) Series 1997-1                                 $0.00          $0.00

  (d) Class A                                       $0.00          $0.00

      Class B                                       $0.00          $0.00
</TABLE>
<PAGE>   3

<TABLE>
<CAPTION>
10.  Reimbursement of Investor Losses This Due Period
     ------------------------------------------------
                                                              Per $1,000 of
                                                            Original Invested
                                                 Total         Principal
  <S>                                               <C>            <C>
  (a) Group One                                     $0.00          $0.00

  (b) Group Two                                     $0.00          $0.00

  (c) Series 1997-1                                 $0.00          $0.00

  (d) Class A                                       $0.00          $0.00

      Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
11.  Aggregate Amount of Unreimbursed Investor Losses
     ------------------------------------------------
                                                              Per $1,000 of
                                                            Original Invested
                                                 Total         Principal
  <S>                                               <C>            <C>
  (a) Group One                                     $0.00          $0.00

  (b) Group Two                                     $0.00          $0.00

  (c) Series 1997-1                                 $0.00          $0.00

  (d) Class A                                       $0.00          $0.00

      Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
     -------------------------------------------------------------------
  <S>                                                      <C>
  (a) Group One                                            $30,315,482.22

  (b) Group Two                                             $4,250,000.00

  (c) Series 1997-1                                         $1,315,790.00

  (d) Class A                                               $1,250,000.00

      Class B                                                  $65,790.00
</TABLE>

<TABLE>
<CAPTION>
13.  Class Available Subordinated Amount at the end of the Due Period
     ----------------------------------------------------------------
                                                               As a Percentage
                                                                 of Class A
                                                 Total         Invested Amount
     <S>                                     <C>                  <C>
     Series 1997-1 Class B                   $98,684,250.00       13.1579%
</TABLE>

<TABLE>
<CAPTION>
14.  Total Available Credit Enhancement Amounts
     ------------------------------------------
                                               Shared Amount    Class B Amount
     <S>                                           <C>          <C>
     Maximum Amount                                $0.00        $59,210,550.00

     Available Amount                              $0.00        $59,210,550.00

     Amount of Drawings on Credit Enhancement
       for this Due Period                         $0.00                 $0.00
</TABLE>
<PAGE>   4

<TABLE>
<CAPTION>
15.  Delinquency Summary
     -------------------
     End of Due Period Master Trust Receivables Outstanding       $26,675,706,815.58

                              Delinquent Amount    Percentage of Ending
     Payment Status           Ending Balance       Receivables Outstanding
     <S>                      <C>                        <C>
     30-59 days                 $628,092,799.56          2.35%

     60-179 days              $1,127,022,100.37          4.22%
</TABLE>

                                 U.S. BANK NATIONAL ASSOCIATION
                                 as Trustee


                              BY:
                                 ------------------------------
                                        Vice President
<PAGE>   5

                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                        Series 1997-1 Monthly Statement

                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of August 26, 1997 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1997-1 Master Trust Certificates for the Distribution Date
occurring on May 17, 1999:

<TABLE>
 <S>                                                                               <C>
 1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.  The aggregate amount of Collections processed during the related Due
     Period is equal to                                                            $4,233,324,936.71

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                              $109,294,125.72

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                        $11,431,834.83

 6a. The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                        $0.00

 6b. The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                          $0.00

 7.  The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall                                $0.00
          is equal to

     (b)  with respect to the Class A Cumulative Investor Charged-Off                          $0.00
          Amount is equal to

     (c)  with respect to the Class A Investor Interest is equal to                            $0.00

 8.  The sum of all amounts payable to the Class A Certificateholders
     on the current Distribution Date is equal to                                      $3,344,166.67
</TABLE>
<PAGE>   6

<TABLE>
<S>                                                                                     <C>
 9.   The aggregate amount of Class B Principal Collections processed during
      the related Due Period is equal to                                                $5,752,524.11

10.   The aggregate amount of Class B Finance Charge Collections processed
      during the related Due Period is equal to                                           $601,696.61

11a.  The aggregate amount of Class B Principal Collections recharacterized as
      Series Yield Collections during the related Due Period is equal to                        $0.00

11b.  The aggregate amount of Class B Additional Funds for this Distribution
      date is equal to                                                                          $0.00

12.   The amount of drawings under the Credit Enhancement required to be
      made on the related Drawing Date pursuant to the Series Supplement:

      (a)  with respect to the Class B Required Amount Shortfall                                $0.00
           is equal to

      (b)  with respect to the Class B Cumulative Investor Charged-Off                          $0.00
           Amount is equal to

      (c)  with respect to the Class B Investor Interest is equal to                            $0.00

13.   The sum of all amounts payable to the Class B Certificateholders
      on the current Distribution Date is equal to                                        $182,326.02

14.   Attached hereto is a true copy of the statement required to be delivered by
      the Master Servicer on the date of this Certificate to the Trustee pursuant to
      Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this  17th day of May, 1999.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              ------------------------------
                           Vice President, Chief Accounting Officer,
                           and Treasurer


<PAGE>   1



                                                                   EXHIBIT (O)


                    MONTHLY CERTIFICATEHOLDERS' STATEMENT
                        Discover Card Master Trust I
                       Series 1997-2 Monthly Statement
                   Class A Certificate CUSIP #25466KBF5
                   Class B Certificate CUSIP #25466KBG3


Trust Distribution Date: May 17, 1999         Due Period Ending:  April 30, 1999

Pursuant to the Series Supplement dated as of October 15, 1997 relating to the
Pooling and Servicing Agreement dated as of October  1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust.  The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<CAPTION>
1.   Payments for the benefit of Series Investors this Due Period (per $1000 of Class Initial Investor Interest)
     -----------------------------------------------------------------------------------------------------------

     Series  1997-2                                           Total           Interest        Principal
         <S>                                               <C>              <C>             <C>
         Class A      30 days at 6.792000000%              $5.660000000     $5.660000000    $0.000000000

         Class B      32 days at 5.326250000%              $4.734444444     $4.734444444    $0.000000000
</TABLE>

<TABLE>
<CAPTION>
2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------
  <S>                                                    <C>
  (a) Aggregate Investor Interest                        $20,624,749,676.00

      Seller Interest                                     $5,632,195,899.94

      Total Master Trust                                 $26,256,945,575.94


  (b) Group One Investor Interest                        $18,074,749,676.00

  (c) Group Two Investor Interest                         $2,550,000,000.00

  (d) Series 1997-2 Investor Interest                       $526,316,000.00

  (e) Class A Investor Interest                             $500,000,000.00

      Class B Investor Interest                              $26,316,000.00
</TABLE>

<TABLE>
<CAPTION>
3.   Allocation of Receivables Collected During the Due Period
     ---------------------------------------------------------
                                                                  Finance Charge     Principal        Yield
                                                                   Collections      Collections     Collections
  <S>                                                           <C>               <C>                      <C>
  (a) Allocation of Collections between Investor and Seller

      Aggregate Investor Allocation                             $316,121,219.78   $3,022,278,825.29        $0.00

      Seller                                                     $84,742,614.59     $810,182,277.03        $0.00

  (b) Group One Allocation                                      $277,252,259.81   $2,650,671,899.42        $0.00

  (c) Group Two Allocation                                       $38,868,959.97     $371,606,925.87        $0.00

  (d) Series 1997-2 Allocations                                   $8,022,487.92      $76,699,044.04        $0.00

  (e) Class A Allocations                                         $7,621,223.22      $72,862,750.48        $0.00

      Class B Allocations                                           $401,264.70       $3,836,293.56        $0.00
</TABLE>
<PAGE>   2

<TABLE>
<CAPTION>
4.   Information Concerning the Series Principal Funding Accounts ("SPFA")
     ---------------------------------------------------------------------
                        Deposits into the
                          SPFAs This            SPFA       Deposit Deficit     Investment
                          Due Period           Balance        Amount             Income
     <S>                     <C>               <C>              <C>              <C>
     Series 1997-2           $0.00             $0.00            0.00             $0.00
</TABLE>

<TABLE>
<CAPTION>
5.   Information Concerning Amount of Controlled Liquidation Payments
     ----------------------------------------------------------------
                                                                                   Total Payments 
                  Amount Paid    PSA Index     Monthly            Deficit Amount    Through This  
                This Due Period    Rate*    Amortization Rate*   This Due Period     Due Period   
     <S>             <C>             <C>       <C>                    <C>              <C>        
     Class A         $0.00           N/A       N/A                    $0.00            $0.00      
                                                                                                  
     Class B         $0.00           N/A       N/A                    $0.00            $0.00      

     *Rates are only applicable during the Class A Controlled Liquidation Period.
</TABLE>

<TABLE>
<CAPTION>
6.   Information Concerning the Series Interest Funding Accounts ("SIFA")
     --------------------------------------------------------------------
                                      Deposits Into the
                                         SIFAs This
                                         Due Period          SIFA Balance
     <S>                                 <C>                      <C>
     Series 1997-2                       $2,954,591.64            $0.00
</TABLE>

<TABLE>
<CAPTION>
7.   Pool Factors
     ------------
                                                            This Due Period
     <S>                                                     <C>
     Class A                                                 1.00000000

     Class B                                                 1.00000000
</TABLE>

<TABLE>
<CAPTION>
8.   Investor Charged-Off Amount
     ---------------------------
                                                                Cumulative
                                                           Investor Charged-Off
                                         This Due Period         Amount
  <S>                                      <C>                       <C>
  (a) Group One                            $86,442,427.02            $0.00

  (b) Group Two                            $12,118,664.92            $0.00

  (c) Series 1997-2                         $2,501,272.05            $0.00

  (d) Class A                               $2,376,164.70            $0.00

      Class B                                 $125,107.35            $0.00
</TABLE>

<TABLE>
<CAPTION>
9.   Investor Losses This Due Period
     -------------------------------
                                                              Per $1,000 of
                                                            Original Invested
                                                 Total         Principal
  <S>                                               <C>            <C>
  (a) Group One                                     $0.00          $0.00

  (b) Group Two                                     $0.00          $0.00

  (c) Series 1997-2                                 $0.00          $0.00

  (d) Class A                                       $0.00          $0.00

      Class B                                       $0.00          $0.00
</TABLE>
<PAGE>   3

<TABLE>
<CAPTION>
10.  Reimbursement of Investor Losses This Due Period
     ------------------------------------------------
                                                              Per $1,000 of
                                                            Original Invested
                                                 Total        Principal
  <S>                                               <C>            <C>
  (a) Group One                                     $0.00          $0.00

  (b) Group Two                                     $0.00          $0.00

  (c) Series 1997-2                                 $0.00          $0.00

  (d) Class A                                       $0.00          $0.00

      Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
11.  Aggregate Amount of Unreimbursed Investor Losses
     ------------------------------------------------
                                                              Per $1,000 of
                                                            Original Invested
                                                 Total        Principal
  <S>                                               <C>            <C>
  (a) Group One                                     $0.00          $0.00

  (b) Group Two                                     $0.00          $0.00

  (c) Series 1997-2                                 $0.00          $0.00

  (d) Class A                                       $0.00          $0.00

      Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
     -------------------------------------------------------------------
  <S>                                                      <C>
  (a) Group One                                            $30,315,482.22

  (b) Group Two                                             $4,250,000.00

  (c) Series 1997-2                                           $877,193.33

  (d) Class A                                                 $833,333.33

      Class B                                                  $43,860.00
</TABLE>

<TABLE>
<CAPTION>
13.  Class Available Subordinated Amount at the end of the Due Period
     ----------------------------------------------------------------
                                                                As a Percentage
                                                                  of Class A
                                                 Total          Invested Amount
     <S>                                     <C>                   <C>
     Series 1997-2 Class B                   $47,368,440.00        9.4737%
</TABLE>

<TABLE>
<CAPTION>
14.  Total Available Credit Enhancement Amounts
     ------------------------------------------
                                              Shared Amount    Class B Amount
     <S>                                           <C>            <C>
     Maximum Amount                                $0.00          $21,052,640.00

     Available Amount                              $0.00          $21,052,640.00

     Amount of Drawings on Credit Enhancement
       for this Due Period                         $0.00                   $0.00
</TABLE>
<PAGE>   4

<TABLE>
<CAPTION>
15.  Delinquency Summary
     -------------------

     End of Due Period Master Trust Receivables Outstanding      $26,675,706,815.58

                         Delinquent Amount        Percentage of Ending
     Payment Status      Ending Balance           Receivables Outstanding
     <S>                 <C>                            <C>
     30-59 days            $628,092,799.56              2.35%

     60-179 days         $1,127,022,100.37              4.22%
</TABLE>

                                 U.S. BANK NATIONAL ASSOCIATION
                                 as Trustee


                              BY:
                                  -----------------------------
                                        Vice President

<PAGE>   5

                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                        Series 1997-2 Monthly Statement

                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of October 15, 1997 (the "Series Supplement")
by and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1997-2 Master Trust Certificates for the Distribution Date
occurring on May 17, 1999:

<TABLE>
 <S>                                                                                <C>
 1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.  The aggregate amount of Collections processed during the related Due
     Period is equal to                                                             $4,233,324,936.71

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                $72,862,750.48

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                          $7,621,223.22

 6a. The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                         $0.00

 6b. The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                           $0.00

 7.  The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall                                 $0.00
          is equal to

     (b)  with respect to the Class A Cumulative Investor Charged-Off                           $0.00
          Amount is equal to

     (c)  with respect to the Class A Investor Interest is equal to                             $0.00

 8.  The sum of all amounts payable to the Class A Certificateholders
     on the current Distribution Date is equal to                                       $2,830,000.00
</TABLE>
<PAGE>   6

<TABLE>
 <S>                                                                                   <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                                $3,836,293.56

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                           $401,264.70

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                        $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution
     date is equal to                                                                          $0.00

12.  The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall                                $0.00
          is equal to

     (b)  with respect to the Class B Cumulative Investor Charged-Off                          $0.00
          Amount is equal to

     (c)  with respect to the Class B Investor Interest is equal to                            $0.00

13.  The sum of all amounts payable to the Class B Certificateholders
     on the current Distribution Date is equal to                                        $124,591.64

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant to
     Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this  17th day of May, 1999.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              ------------------------------
                           Vice President, Chief Accounting Officer,
                           and Treasurer

<PAGE>   1



                                                                   EXHIBIT (P)


                    MONTHLY CERTIFICATEHOLDERS' STATEMENT
                        Discover Card Master Trust I
                       Series 1997-3 Monthly Statement
                   Class A Certificate CUSIP #25466KBH1
                   Class B Certificate CUSIP #25466KBJ7


Trust Distribution Date: May 17, 1999         Due Period Ending:  April 30, 1999

Pursuant to the Series Supplement dated as of October 23, 1997 relating to the
Pooling and Servicing Agreement dated as of October  1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust.  The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<CAPTION>
1.   Payments for the benefit of Series Investors this Due Period (per $1000 of Class Initial Investor Interest)
     -----------------------------------------------------------------------------------------------------------

     Series  1997-3                                        Total          Interest         Principal
         <S>                                            <C>             <C>              <C>
         Class A      32 days at 5.056250000%           $4.494444444    $4.494444444     $0.000000000

         Class B      32 days at 5.236250000%           $4.654444444    $4.654444444     $0.000000000
</TABLE>

<TABLE>
<CAPTION>
2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------
  <S>                                                   <C>
  (a) Aggregate Investor Interest                        $20,624,749,676.00

      Seller Interest                                     $5,632,195,899.94

      Total Master Trust                                 $26,256,945,575.94


  (b) Group One Investor Interest                        $18,074,749,676.00

  (c) Group Two Investor Interest                         $2,550,000,000.00

  (d) Series 1997-3 Investor Interest                       $684,211,000.00

  (e) Class A Investor Interest                             $650,000,000.00

      Class B Investor Interest                              $34,211,000.00
</TABLE>

<TABLE>
<CAPTION>
3.   Allocation of Receivables Collected During the Due Period
     ---------------------------------------------------------
                                                                    Finance Charge     Principal        Yield
                                                                     Collections      Collections     Collections
  <S>                                                             <C>               <C>                      <C>
  (a) Allocation of Collections between Investor and Seller

      Aggregate Investor Allocation                               $316,121,219.78   $3,022,278,825.29        $0.00

      Seller                                                       $84,742,614.59     $810,182,277.03        $0.00

  (b) Group One Allocation                                        $277,252,259.81   $2,650,671,899.42        $0.00

  (c) Group Two Allocation                                         $38,868,959.97     $371,606,925.87        $0.00

  (d) Series 1997-3 Allocations                                    $10,429,274.38      $99,709,140.49        $0.00

  (e) Class A Allocations                                           $9,907,750.53      $94,723,108.60        $0.00

      Class B Allocations                                             $521,523.85       $4,986,031.89        $0.00
</TABLE>
<PAGE>   2

<TABLE>
<CAPTION>
4.   Information Concerning the Series Principal Funding Accounts ("SPFA")
     ---------------------------------------------------------------------
                        Deposits into the
                          SPFAs This          SPFA      Deposit Deficit   Investment
                          Due Period         Balance        Amount          Income
     <S>                     <C>              <C>            <C>            <C>
     Series 1997-3           $0.00            $0.00          0.00           $0.00
</TABLE>

<TABLE>
<CAPTION>
5.   Information Concerning Amount of Controlled Liquidation Payments
     ----------------------------------------------------------------
                                                                     Total Payments
                               Amount Paid        Deficit Amount      Through This
                             This Due Period     This Due Period       Due Period
     <S>                           <C>              <C>                  <C>
     Series 1997-3                 $0.00            $0.00                $0.00
</TABLE>

<TABLE>
<CAPTION>
6.   Information Concerning the Series Interest Funding Accounts ("SIFA")
     --------------------------------------------------------------------
                                          Deposits Into the
                                             SIFAs This
                                             Due Period          SIFA Balance
     <S>                                   <C>                         <C>
     Series 1997-3                         $3,080,622.09               $0.00
</TABLE>

<TABLE>
<CAPTION>
7.   Pool Factors
     ------------
                                                            This Due Period
     <S>                                                     <C>
     Class A                                                 1.00000000

     Class B                                                 1.00000000
</TABLE>

<TABLE>
<CAPTION>
8.   Investor Charged-Off Amount
     ---------------------------
                                                                 Cumulative
                                                             Investor Charged-Off
                                        This Due Period            Amount
  <S>                                      <C>                       <C>
  (a) Group One                            $86,442,427.02            $0.00

  (b) Group Two                            $12,118,664.92            $0.00

  (c) Series 1997-3                         $3,251,666.15            $0.00

  (d) Class A                               $3,089,064.10            $0.00

      Class B                                 $162,602.05            $0.00
</TABLE>

<TABLE>
<CAPTION>
9.   Investor Losses This Due Period
     -------------------------------
                                                              Per $1,000 of
                                                            Original Invested
                                                 Total         Principal
  <S>                                               <C>            <C>
  (a) Group One                                     $0.00          $0.00

  (b) Group Two                                     $0.00          $0.00

  (c) Series 1997-3                                 $0.00          $0.00

  (d) Class A                                       $0.00          $0.00

      Class B                                       $0.00          $0.00
</TABLE>
<PAGE>   3

<TABLE>
<CAPTION>
10.  Reimbursement of Investor Losses This Due Period
     ------------------------------------------------
                                                              Per $1,000 of
                                                            Original Invested
                                                 Total         Principal
  <S>                                               <C>            <C>
  (a) Group One                                     $0.00          $0.00

  (b) Group Two                                     $0.00          $0.00

  (c) Series 1997-3                                 $0.00          $0.00

  (d) Class A                                       $0.00          $0.00

      Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
11.  Aggregate Amount of Unreimbursed Investor Losses
     ------------------------------------------------
                                                              Per $1,000 of
                                                            Original Invested
                                                 Total        Principal
  <S>                                               <C>            <C>
  (a) Group One                                     $0.00          $0.00

  (b) Group Two                                     $0.00          $0.00

  (c) Series 1997-3                                 $0.00          $0.00

  (d) Class A                                       $0.00          $0.00

      Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
     -------------------------------------------------------------------
  <S>                                                      <C>
  (a) Group One                                            $30,315,482.22

  (b) Group Two                                             $4,250,000.00

  (c) Series 1997-3                                         $1,140,351.66

  (d) Class A                                               $1,083,333.33

      Class B                                                  $57,018.33
</TABLE>

<TABLE>
<CAPTION>
13.  Class Available Subordinated Amount at the end of the Due Period
     ----------------------------------------------------------------
                                                                As a Percentage
                                                                 of Class A
                                                 Total          Invested Amount
     <S>                                     <C>                   <C>
     Series 1997-3 Class B                   $85,526,375.00        13.1579%
</TABLE>

<TABLE>
<CAPTION>
14.  Total Available Credit Enhancement Amounts
     ------------------------------------------
                                               Shared Amount    Class B Amount
     <S>                                           <C>         <C>
     Maximum Amount                                $0.00       $51,315,825.00

     Available Amount                              $0.00       $51,315,825.00

     Amount of Drawings on Credit Enhancement
       for this Due Period                         $0.00                $0.00
</TABLE>
<PAGE>   4

<TABLE>
<CAPTION>
15.  Delinquency Summary
     -------------------

     End of Due Period Master Trust Receivables Outstanding      $26,675,706,815.58

                         Delinquent Amount       Percentage of Ending
     Payment Status      Ending Balance          Receivables Outstanding
     <S>                 <C>                           <C>
     30-59 days            $628,092,799.56             2.35%

     60-179 days         $1,127,022,100.37             4.22%
</TABLE>

                                 U.S. BANK NATIONAL ASSOCIATION
                                 as Trustee


                              BY:
                                  -----------------------------
                                        Vice President


<PAGE>   5

                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                        Series 1997-3 Monthly Statement

                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of October 23, 1997 (the "Series Supplement")
by and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1997-3 Master Trust Certificates for the Distribution Date
occurring on May 17, 1999:

<TABLE>
 <S>                                                                                       <C>
 1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.  The aggregate amount of Collections processed during the related Due
     Period is equal to                                                                    $4,233,324,936.71

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                       $94,723,108.60

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                                 $9,907,750.53

 6a. The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

 6b. The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

 7.  The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class A Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class A Investor Interest is equal to                                    $0.00

 8.  The sum of all amounts payable to the Class A Certificateholders
     on the current Distribution Date is equal to                                              $2,921,388.89
</TABLE>
<PAGE>   6

<TABLE>
<S>                                                                                            <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                                        $4,986,031.89

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                                   $521,523.85

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

12.  The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class B Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class B Investor Interest is equal to                                    $0.00

13.  The sum of all amounts payable to the Class B Certificateholders
     on the current Distribution Date is equal to                                                $159,233.20

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant to
     Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this  17th day of May, 1999.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              ------------------------------
                           Vice President, Chief Accounting Officer,
                           and Treasurer



<PAGE>   1
                                                                     EXHIBIT (Q)

                     MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1997-4 Monthly Statement
                      Class A Certificate CUSIP #25466KBK4
                      Class B Certificate CUSIP #25466KBL2


Trust Distribution Date: May 17, 1999       Due Period Ending: April 30, 1999

Pursuant to the Series Supplement dated as of October 31, 1997 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<CAPTION>
1.     Payments for the benefit of Series Investors this Due Period (per $1000 of Class Initial Investor Interest)
       -----------------------------------------------------------------------------------------------------------

       Series  1997-4                                           Total              Interest         Principal
            <S>                                               <C>               <C>              <C>
              Class A      32 days at 4.996250000%             $4.441111111      $4.441111111     $0.000000000

              Class B      32 days at 5.176250000%             $4.601111111      $4.601111111     $0.000000000
</TABLE>

<TABLE>
<CAPTION>
2.     Principal Receivables at the end of the Due Period
       --------------------------------------------------
<S>                                                         <C>
    (a)   Aggregate Investor Interest                        $20,624,749,676.00

          Seller Interest                                     $5,632,195,899.94

          Total Master Trust                                 $26,256,945,575.94

    (b)   Group One Investor Interest                        $18,074,749,676.00

    (c)   Group Two Investor Interest                         $2,550,000,000.00

    (d)   Series 1997-4 Investor Interest                       $789,474,000.00

    (e)   Class A Investor Interest                             $750,000,000.00

          Class B Investor Interest                              $39,474,000.00
</TABLE>

<TABLE>
<CAPTION>
3.     Allocation of Receivables Collected During the Due Period
       ---------------------------------------------------------

                                                                         Finance Charge         Principal             Yield
                                                                           Collections         Collections          Collections
<S>                                                                     <C>                  <C>                  <C>
    (a)   Allocation of Collections between Investor and Seller

          Aggregate Investor Allocation                                  $316,121,219.78      $3,022,278,825.29      $0.00

          Seller                                                          $84,742,614.59        $810,182,277.03      $0.00

    (b)   Group One Allocation                                           $277,252,259.81      $2,650,671,899.42      $0.00

    (c)   Group Two Allocation                                            $38,868,959.97        $371,606,925.87      $0.00

    (d)   Series 1997-4 Allocations                                       $12,033,531.44        $115,046,649.83      $0.00

    (e)   Class A Allocations                                             $11,431,834.83        $109,294,125.72      $0.00

          Class B Allocations                                                $601,696.61          $5,752,524.11      $0.00
</TABLE>


<PAGE>   2

<TABLE>
<CAPTION>
4.     Information Concerning the Series Principal Funding Accounts ("SPFA")
       ---------------------------------------------------------------------
                                    Deposits into
                                   the SPFAs This            SPFA             Deposit Deficit            Investment
                                     Due Period            Balance                 Amount                  Income
         <S>                      <C>                     <C>                <C>                        <C>
          Series 1997-4                $0.00               $0.00                    0.00                    $0.00
</TABLE>

<TABLE>
<CAPTION>
5.     Information Concerning Amount of Controlled Liquidation Payments
       ----------------------------------------------------------------
                                                                                                Total Payments
                                                              Amount Paid     Deficit Amount     Through This
                                                            This Due Period   This Due Period     Due Period
         <S>                                               <C>               <C>               <C>
          Series 1997-4                                         $0.00            $0.00             $0.00
</TABLE>

<TABLE>
<CAPTION>
6.     Information Concerning the Series Interest Funding Accounts ("SIFA")
       --------------------------------------------------------------------
                                                                     Deposits Into the
                                                                         SIFAs This
                                                                         Due Period                SIFA Balance
        <S>                                                         <C>                           <C>
          Series 1997-4                                                $3,512,457.59                   $0.00
</TABLE>

<TABLE>
<CAPTION>
7.     Pool Factors
       ------------
                                                                                                This Due Period
         <S>                                                                                        <C>
          Class A                                                                                    1.00000000

          Class B                                                                                    1.00000000
</TABLE>

<TABLE>
<CAPTION>
8.     Investor Charged-Off Amount
       ---------------------------                                                                Cumulative
                                                                                             Investor Charged-Off
                                                                        This Due Period             Amount
   <S>                                                                  <C>                        <C>
    (a)   Group One                                                      $86,442,427.02             $0.00

    (b)   Group Two                                                      $12,118,664.92             $0.00

    (c)   Series 1997-4                                                   $3,751,845.57             $0.00

    (d)   Class A                                                         $3,564,247.04             $0.00

          Class B                                                           $187,598.53             $0.00
</TABLE>


<TABLE>
<CAPTION>
9.     Investor Losses This Due Period
       -------------------------------                                                    Per $1,000 of
                                                                                         Original Invested
                                                                                Total        Principal
    <S>                                                                        <C>            <C>
    (a)   Group One                                                             $0.00          $0.00

    (b)   Group Two                                                             $0.00          $0.00

    (c)   Series 1997-4                                                         $0.00          $0.00

    (d)   Class A                                                               $0.00          $0.00

          Class B                                                               $0.00          $0.00
</TABLE>


<PAGE>   3

<TABLE>
<CAPTION>
10.    Reimbursement of Investor Losses This Due Period
       ------------------------------------------------
                                                                                             Per $1,000 of
                                                                                           Original Invested
                                                                               Total           Principal
    <S>                                                                       <C>              <C>
    (a)   Group One                                                            $0.00            $0.00

    (b)   Group Two                                                            $0.00            $0.00

    (c)   Series 1997-4                                                        $0.00            $0.00

    (d)   Class A                                                              $0.00            $0.00

          Class B                                                              $0.00            $0.00
</TABLE>

<TABLE>
<CAPTION>
11.    Aggregate Amount of Unreimbursed Investor Losses
       ------------------------------------------------
                                                                                              Per $1,000 of
                                                                                            Original Invested
                                                                               Total            Principal
    <S>                                                                       <C>               <C>
    (a)   Group One                                                            $0.00             $0.00

    (b)   Group Two                                                            $0.00             $0.00

    (c)   Series 1997-4                                                        $0.00             $0.00

    (d)   Class A                                                              $0.00             $0.00

          Class B                                                              $0.00             $0.00
</TABLE>


<TABLE>
<CAPTION>
12.    Investor Monthly Servicing Fee Payable at the end of the Due Period
       -------------------------------------------------------------------

    <S>                                                                                <C>
    (a)   Group One                                                                     $30,315,482.22

    (b)   Group Two                                                                      $4,250,000.00

    (c)   Series 1997-4                                                                  $1,315,790.00

    (d)   Class A                                                                        $1,250,000.00

          Class B                                                                           $65,790.00
</TABLE>


<TABLE>
<CAPTION>
13.    Class Available Subordinated Amount at the end of the Due Period
       ----------------------------------------------------------------
                                                                                            As a Percentage
                                                                                              of Class A
                                                                                Total       Invested Amount
         <S>                                                               <C>                <C>
          Series 1997-4 Class B                                            $98,684,250.00      13.1579%
</TABLE>


<TABLE>
<CAPTION>
14.    Total Available Credit Enhancement Amounts
       ------------------------------------------
                                                                              Shared Amount  Class B Amount
         <S>                                                                     <C>        <C>
          Maximum Amount                                                          $0.00      $59,210,550.00

          Available Amount                                                        $0.00      $59,210,550.00

          Amount of Drawings on Credit Enhancement
            for this Due Period                                                   $0.00               $0.00
</TABLE>



<PAGE>   4

<TABLE>
<CAPTION>
15.    Delinquency Summary
       -------------------

       End of Due Period Master Trust Receivables Outstanding             $26,675,706,815.58

                                 Delinquent Amount      Percentage of Ending
       Payment Status            Ending Balance         Receivables Outstanding
      <S>                     <C>                             <C>
       30-59 days                 $628,092,799.56              2.35%

       60-179 days              $1,127,022,100.37              4.22%
</TABLE>



                                      U.S. BANK NATIONAL ASSOCIATION
                                      as Trustee


                                   BY: 
                                       ----------------------------

                                             Vice President

<PAGE>   5


                     MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1997-4 Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

       The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of October 31, 1997 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1997-4 Master Trust Certificates for the Distribution Date
occurring on May 17, 1999:


<TABLE>
 <S>                                                                                <C> 
 1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.      
                                                                                  
 2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.      
                                                                                  
 3.  The aggregate amount of Collections processed during the related Due         
     Period is equal to                                                             $4,233,324,936.71
                                                                                  
 4.  The aggregate amount of Class A Principal Collections processed during       
     the related Due Period is equal to                                               $109,294,125.72
                                                                                  
 5.  The aggregate amount of Class A Finance Charge Collections processed         
     during the related Due Period is equal to                                         $11,431,834.83
                                                                                  
 6a. The aggregate amount of Class A Principal Collections recharacterized as     
     Series Yield Collections during the related Due Period is equal to                         $0.00
                                                                                  
 6b. The aggregate amount of Class A Additional Funds for this Distribution       
     date is equal to                                                                           $0.00
                                                                                  
  7. The amount of drawings under the Credit Enhancement required to be           
     made on the related Drawing Date pursuant to the Series Supplement:          
                                                                                  
     (a)  with respect to the Class A Required Amount Shortfall                                 $0.00
          is equal to                                                                     
                                                                                          
     (b)  with respect to the Class A Cumulative Investor Charged-Off                           $0.00
          Amount is equal to                                                              
                                                                                          
     (c)  with respect to the Class A Investor Interest is equal to                             $0.00
                                                                                  
 8.  The sum of all amounts payable to the Class A Certificateholders             
     on the current Distribution Date is equal to                                       $3,330,833.33
</TABLE>

<PAGE>   6




<TABLE>
<S>                                                                                 <C>              
 9.  The aggregate amount of Class B Principal Collections processed during         
     the related Due Period is equal to                                                 $5,752,524.11
                                                                                    
10.  The aggregate amount of Class B Finance Charge Collections processed           
     during the related Due Period is equal to                                            $601,696.61
                                                                                    
11a. The aggregate amount of Class B Principal Collections recharacterized as       
     Series Yield Collections during the related Due Period is equal to                         $0.00
                                                                                    
11b. The aggregate amount of Class B Additional Funds for this Distribution         
     date is equal to                                                                           $0.00
                                                                                    
 12. The amount of drawings under the Credit Enhancement required to be             
     made on the related Drawing Date pursuant to the Series Supplement:            
                                                                                    
     (a)  with respect to the Class B Required Amount Shortfall                                 $0.00
          is equal to                                                                    
                                                                                         
     (b)  with respect to the Class B Cumulative Investor Charged-Off                           $0.00
          Amount is equal to                                                             
                                                                                         
     (c)  with respect to the Class B Investor Interest is equal to                             $0.00
                                                                                    
13.  The sum of all amounts payable to the Class B Certificateholders               
     on the current Distribution Date is equal to                                         $181,624.26
                                                                                    
14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant to
     Section 16 of the Series Supplement.                                           
</TABLE>

          IN WITNESS WHEREOF, the undersigned has duly executed and delivered
      certificate this 17th day of May, 1999.



                                GREENWOOD TRUST COMPANY
                                  as Master Servicer

                                By:
                                   -------------------------
                                Vice President, Chief Accounting Officer,
                                and Treasurer




<PAGE>   1



                                                                     EXHIBIT (R)


                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1998-1 Monthly Statement
                      Class A Certificate CUSIP #25466KBM0
                      Class B Certificate CUSIP #25466KBN8


Trust Distribution Date: May 17, 1999       Due Period Ending:  April 30, 1999

Pursuant to the Series Supplement dated as of January 14, 1998 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<CAPTION>
1. Payments for the benefit of Series Investors this Due Period (per $1000 of Class Initial Investor Interest)
   -----------------------------------------------------------------------------------------------------------

   Series 1998-1                                            Total               Interest                Principal
<S>                                                      <C>                   <C>                     <C>         
         Class A      32 days at 5.016250000%            $4.458888889          $4.458888889            $0.000000000

         Class B      32 days at 5.196250000%            $4.618888889          $4.618888889            $0.000000000
</TABLE>

<TABLE>
<CAPTION>
2.  Principal Receivables at the end of the Due Period
    --------------------------------------------------

<S>                                                            <C>               
    (a)  Aggregate Investor Interest                        $20,624,749,676.00
         Seller Interest                                     $5,632,195,899.94

         Total Master Trust                                 $26,256,945,575.94


    (b)  Group One Investor Interest                        $18,074,749,676.00

    (c)  Group Two Investor Interest                         $2,550,000,000.00

    (d)  Series 1998-1 Investor Interest                       $368,422,000.00

    (e)  Class A Investor Interest                             $350,000,000.00

         Class B Investor Interest                              $18,422,000.00
</TABLE>

<TABLE>
<CAPTION>
3.  Allocation of Receivables Collected During the Due Period
    ---------------------------------------------------------

                                                                    Finance Charge            Principal                Yield
                                                                     Collections             Collections            Collections
    <S>                                                               <C>                    <C>                          <C>  
    (a)  Allocation of Collections between Investor and Seller
         Aggregate Investor Allocation                             $316,121,219.78        $3,022,278,825.29            $0.00

         Seller                                                     $84,742,614.59          $810,182,277.03            $0.00

    (b)  Group One Allocation                                      $277,252,259.81        $2,650,671,899.42            $0.00

    (c)  Group Two Allocation                                       $38,868,959.97          $371,606,925.87            $0.00

    (d)  Series 1998-1 Allocations                                   $5,615,701.46           $53,688,947.58            $0.00

    (e)  Class A Allocations                                         $5,335,096.77           $51,006,224.81            $0.00

         Class B Allocations                                           $280,604.69            $2,682,722.77            $0.00
</TABLE>


<PAGE>   2

<TABLE>
<CAPTION>
     4.   Information Concerning the Series Principal Funding Accounts ("SPFA")
          ---------------------------------------------------------------------
                              Deposits into the
                               SPFAs This        SPFA    Deposit Deficit  Investment
                               Due Period       Balance    Amount          Income
<S>                               <C>           <C>           <C>          <C>  
          Series 1998-1           $0.00         $0.00         0.00         $0.00
</TABLE>

<TABLE>
<CAPTION>
     5.   Information Concerning Amount of Controlled Liquidation Payments
          ----------------------------------------------------------------
                                                                      Total Payments
                                   Amount Paid       Deficit Amount     Through This
                                  This Due Period    This Due Period     Due Period
<S>                                     <C>              <C>               <C>  
          Series 1998-1                 $0.00            $0.00             $0.00
</TABLE>

<TABLE>
<CAPTION>
     6.   Information Concerning the Series Interest Funding Accounts ("SIFA")
          --------------------------------------------------------------------
                                                 Deposits Into the
                                                   SIFAs This
                                                   Due Period     SIFA Balance
<S>                                             <C>                      <C>  
          Series 1998-1                         $1,645,700.28            $0.00
</TABLE>

<TABLE>
<CAPTION>
     7.   Pool Factors
          ------------
                                                                 This Due Period
<S>                                                               <C>       
          Class A                                                 1.00000000

          Class B                                                 1.00000000
</TABLE>

<TABLE>
<CAPTION>
     8.   Investor Charged-Off Amount
          ---------------------------
                                                                      Cumulative
                                                                   Investor Charged-Off
                                               This Due Period          Amount
<S>                                              <C>                       <C>  
      (a) Group One                              $86,442,427.02            $0.00
                           
      (b) Group Two                              $12,118,664.92            $0.00
                           
      (c) Series 1998-1                           $1,750,877.93            $0.00
                           
      (d) Class A                                 $1,663,390.28            $0.00
                           
          Class B                                    $87,487.65            $0.00
</TABLE>

<TABLE>
<CAPTION>
     9.   Investor Losses This Due Period
          -------------------------------
                                                                  Per $1,000 of
                                                                 Original Invested
                                                      Total        Principal
<S>                                                     <C>            <C>  
      (a) Group One                                       $0.00          $0.00
                             
      (b) Group Two                                       $0.00          $0.00
                             
      (c) Series 1998-1                                   $0.00          $0.00
                             
      (d) Class A                                         $0.00          $0.00
                             
          Class B                                         $0.00          $0.00
</TABLE>



<PAGE>   3



<TABLE>
<CAPTION>
     10.  Reimbursement of Investor Losses This Due Period
          ------------------------------------------------
                                                                  Per $1,000 of
                                                                 Original Invested
                                                      Total        Principal
<S>                                                     <C>            <C>  
      (a) Group One                                       $0.00          $0.00
                              
      (b) Group Two                                       $0.00          $0.00
                              
      (c) Series 1998-1                                   $0.00          $0.00
                              
      (d) Class A                                         $0.00          $0.00
                              
          Class B                                         $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
     11.  Aggregate Amount of Unreimbursed Investor Losses
          ------------------------------------------------
                                                                  Per $1,000 of
                                                                 Original Invested
                                                      Total        Principal

<S>                                                     <C>            <C>  
      (a) Group One                                     $0.00          $0.00

      (b) Group Two                                     $0.00          $0.00

      (c) Series 1998-1                                 $0.00          $0.00

      (d) Class A                                       $0.00          $0.00

          Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
     12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
          -------------------------------------------------------------------

<S>                                                            <C>           
      (a) Group One                                            $30,315,482.22

      (b) Group Two                                             $4,250,000.00

      (c) Series 1998-1                                           $614,036.66

      (d) Class A                                                 $583,333.33

          Class B                                                  $30,703.33
</TABLE>

<TABLE>
<CAPTION>
     13.  Class Available Subordinated Amount at the end of the Due Period
          ----------------------------------------------------------------
                                                                  As a Percentage
                                                                    of Class A
                                                      Total       Invested Amount
<S>                                              <C>               <C>     
          Series 1998-1 Class B                   $46,052,750.00    13.1579%
</TABLE>

<TABLE>
<CAPTION>
     14.  Total Available Credit Enhancement Amounts
          ------------------------------------------

                                                  Shared Amount  Class B Amount
<S>                                                     <C>     <C>           
          Maximum Amount                                $0.00   $27,631,650.00

          Available Amount                              $0.00   $27,631,650.00

          Amount of Drawings on Credit Enhancement
            for this Due Period                         $0.00            $0.00
</TABLE>



<PAGE>   4



<TABLE>
<CAPTION>
     15.  Delinquency Summary
          -------------------

          End of Due Period Master Trust Receivables Outstanding $26,675,706,815.58

                              Delinquent Amount    Percentage of Ending
          Payment Status      Ending Balance       Receivables Outstanding
<S>                        <C>                        <C>  
          30-59 days         $628,092,799.56          2.35%

          60-179 days      $1,127,022,100.37          4.22%
</TABLE>


                                       U.S. BANK NATIONAL ASSOCIATION
                                       as Trustee


                                   BY:
                                       ----------------------------
        
                                             Vice President



<PAGE>   5




                     MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1998-1 Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

       The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of January 14, 1998 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1998-1 Master Trust Certificates for the Distribution Date
occurring on May 17, 1999:


<TABLE>
<S>                                                                                 <C>              
1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

3.  The aggregate amount of Collections processed during the related Due
    Period is equal to                                                              $4,233,324,936.71
                                                                                                     
4.  The aggregate amount of Class A Principal Collections processed during                           
    the related Due Period is equal to                                                 $51,006,224.81
                                                                                                     
5.  The aggregate amount of Class A Finance Charge Collections processed                             
    during the related Due Period is equal to                                           $5,335,096.77
                                                                                                     
6a. The aggregate amount of Class A Principal Collections recharacterized as                         
    Series Yield Collections during the related Due Period is equal to                          $0.00
                                                                                                     
6b. The aggregate amount of Class A Additional Funds for this Distribution                           
    date is equal to                                                                            $0.00
                                                                                                     
7.  The amount of drawings under the Credit Enhancement required to be                               
    made on the related Drawing Date pursuant to the Series Supplement:                              
                                                                                                     
    (a)  with respect to the Class A Required Amount Shortfall                                  $0.00
         is equal to                                                                                 
                                                                                                     
    (b)  with respect to the Class A Cumulative Investor Charged-Off                            $0.00
         Amount is equal to                                                                          
                                                                                                     
    (c)  with respect to the Class A Investor Interest is equal to                              $0.00
                                                                                                     
8.  The sum of all amounts payable to the Class A Certificateholders                                 
    on the current Distribution Date is equal to                                        $1,560,611.11
</TABLE>


<PAGE>   6




<TABLE>
<S>                                                                                                <C>
      9.  The aggregate amount of Class B Principal Collections processed during
          the related Due Period is equal to                                                       $2,682,722.77
                                                                                                                
     10.  The aggregate amount of Class B Finance Charge Collections processed                                  
          during the related Due Period is equal to                                                  $280,604.69
                                                                                                                
     11a. The aggregate amount of Class B Principal Collections recharacterized as                              
          Series Yield Collections during the related Due Period is equal to                               $0.00
                                                                                                                
     11b. The aggregate amount of Class B Additional Funds for this Distribution                                
          date is equal to                                                                                 $0.00
                                                                                                                
      12. The amount of drawings under the Credit Enhancement required to be                                    
          made on the related Drawing Date pursuant to the Series Supplement:                                   
                                                                                                                
          (a)  with respect to the Class B Required Amount Shortfall                                       $0.00
               is equal to                                                                                      
                                                                                                                
          (b)  with respect to the Class B Cumulative Investor Charged-Off                                 $0.00
               Amount is equal to                                                                               
                                                                                                                
          (c)  with respect to the Class B Investor Interest is equal to                                   $0.00
                                                                                                                
     13.  The sum of all amounts payable to the Class B Certificateholders                                      
          on the current Distribution Date is equal to                                                $85,089.17
                                                                                                                
     14.  Attached hereto is a true copy of the statement required to be delivered by
          the Master Servicer on the date of this Certificate to the Trustee pursuant to
          Section 16 of the Series Supplement.
</TABLE>

          IN WITNESS WHEREOF, the undersigned has duly executed and delivered
      certificate this 17th day of May, 1999.


                                GREENWOOD TRUST COMPANY
                                  as Master Servicer

                                By:
                                   -------------------------
                                Vice President, Chief Accounting Officer,
                                and Treasurer




<PAGE>   1

                                                                     EXHIBIT (S)


                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1998-2 Monthly Statement
                      Class A Certificate CUSIP #25466KBP3
                      Class B Certificate CUSIP #25466KBQ1


Trust Distribution Date: May 17, 1999       Due Period Ending:  April 30, 1999

Pursuant to the Series Supplement dated as of March 4, 1998 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<CAPTION>
     1.   Payments for the benefit of Series Investors this Due Period (per $1000 of Class Initial Investor Interest)
          -----------------------------------------------------------------------------------------------------------

          Series  1998-2                                     Total          Interest            Principal
<S>                                                      <C>              <C>                <C>         
              Class A      30 days at 5.800000000%       $4.833333333     $4.833333333       $0.000000000

              Class B      30 days at 5.950000000%       $4.958333333     $4.958333333       $0.000000000
</TABLE>

<TABLE>
<CAPTION>
     2.   Principal Receivables at the end of the Due Period
          --------------------------------------------------
<S>                                                               <C>               
       (a)  Aggregate Investor Interest                             $20,624,749,676.00
            Seller Interest                                          $5,632,195,899.94

            Total Master Trust                                      $26,256,945,575.94


       (b)  Group One Investor Interest                             $18,074,749,676.00

       (c)  Group Two Investor Interest                              $2,550,000,000.00

       (d)  Series 1998-2 Investor Interest                            $526,316,000.00

       (e)  Class A Investor Interest                                  $500,000,000.00

            Class B Investor Interest                                   $26,316,000.00
</TABLE>

<TABLE>
<CAPTION>
     3.   Allocation of Receivables Collected During the Due Period
          ---------------------------------------------------------

                                                                      Finance Charge           Principal             Yield    
                                                                       Collections            Collections          Collections
                                                                                                                              
<S>                                                                   <C>                   <C>                         <C>     
       (a)  Allocation of Collections between Investor and Seller                                                             
            Aggregate Investor Allocation                             $316,121,219.78       $3,022,278,825.29           $0.00 
                                                                                                                              
            Seller                                                     $84,742,614.59         $810,182,277.03           $0.00 
                                                                                                                              
       (b)  Group One Allocation                                      $277,252,259.81       $2,650,671,899.42           $0.00 
                                                                                                                              
       (c)  Group Two Allocation                                       $38,868,959.97         $371,606,925.87           $0.00 
                                                                                                                              
       (d)  Series 1998-2 Allocations                                   $8,022,487.92          $76,699,044.04           $0.00 
                                                                                                                              
       (e)  Class A Allocations                                         $7,621,223.22          $72,862,750.48           $0.00 
                                                                                                                              
            Class B Allocations                                           $401,264.70           $3,836,293.56           $0.00 
</TABLE>


<PAGE>   2



<TABLE>
<CAPTION>
     4.   Information Concerning the Series Principal Funding Accounts ("SPFA")
          ---------------------------------------------------------------------
                              Deposits into the
                               SPFAs This        SPFA     Deposit Deficit  Investment
                               Due Period       Balance     Amount          Income
<S>                          <C>             <C>         <C>             <C>  
          Series 1998-2         $0.00           $0.00       0.00           $0.00
</TABLE>

<TABLE>
<CAPTION>
     5.   Information Concerning Amount of Controlled Liquidation Payments
          ----------------------------------------------------------------
                                                                                Total Payments
                                          Amount Paid        Deficit Amount       Through This
                                        This Due Period      This Due Period        Due Period
<S>                                        <C>                   <C>                    <C>  
          Series 1998-2                      $0.00                 $0.00                  $0.00
</TABLE>

<TABLE>
<CAPTION>
     6.   Information Concerning the Series Interest Funding Accounts ("SIFA")
          --------------------------------------------------------------------
                                                   Deposits Into the
                                                     SIFAs This
                                                      Due Period           SIFA Balance
<S>                                                  <C>                   <C>          
          Series 1998-2                              $2,547,150.17         $5,094,300.34
</TABLE>

<TABLE>
<CAPTION>
     7.   Pool Factors
                                                                 This Due Period
<S>                                                               <C>       
          Class A                                                 1.00000000

          Class B                                                 1.00000000
</TABLE>

<TABLE>
<CAPTION>
     8.   Investor Charged-Off Amount
          ---------------------------
                                                                               Cumulative
                                                                          Investor Charged-Off
                                                 This Due Period                  Amount
<S>                                                 <C>                            <C>  
      (a) Group One                                  $86,442,427.02                 $0.00
                              
      (b) Group Two                                  $12,118,664.92                 $0.00
                              
      (c) Series 1998-2                               $2,501,272.05                 $0.00
                              
      (d) Class A                                     $2,376,164.70                 $0.00
                              
          Class B                                       $125,107.35                 $0.00
</TABLE>

<TABLE>
<CAPTION>
     9.   Investor Losses This Due Period
          -------------------------------
                                                                         Per $1,000 of     
                                                                        Original Invested  
                                                             Total        Principal        
<S>                                                          <C>             <C>  
      (a) Group One                                           $0.00           $0.00
                            
      (b) Group Two                                           $0.00           $0.00
                            
      (c) Series 1998-2                                       $0.00           $0.00
                            
      (d) Class A                                             $0.00           $0.00
                            
          Class B                                             $0.00           $0.00
</TABLE>



<PAGE>   3





<TABLE>
<CAPTION>
                                                          
     10.  Reimbursement of Investor Losses This Due Period               Per $1,000 of    
          ------------------------------------------------              Original Invested 
                                                             Total        Principal       
<S>                                                          <C>            <C>  
       (a)  Group One                                          $0.00          $0.00

       (b)  Group Two                                          $0.00          $0.00

       (c)  Series 1998-2                                      $0.00          $0.00

       (d)  Class A                                            $0.00          $0.00

            Class B                                            $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
                                                          
                                                          
     11.  Aggregate Amount of Unreimbursed Investor Losses                 Per $1,000 of  
          ------------------------------------------------              Original Invested 
                                                             Total        Principal       
<S>                                                          <C>            <C>  
       (a)  Group One                                          $0.00          $0.00

       (b)  Group Two                                          $0.00          $0.00

       (c)  Series 1998-2                                      $0.00          $0.00

       (d)  Class A                                            $0.00          $0.00

            Class B                                            $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
     12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
          -------------------------------------------------------------------
<S>                                                                 <C>           
       (a)  Group One                                                 $30,315,482.22

       (b)  Group Two                                                  $4,250,000.00

       (c)  Series 1998-2                                                $877,193.33

       (d)  Class A                                                      $833,333.33

            Class B                                                       $43,860.00
</TABLE>

<TABLE>
<CAPTION>
     13.  Class Available Subordinated Amount at the end of the Due Period
          ----------------------------------------------------------------
                                                                  As a Percentage
                                                                    of Class A
                                                      Total       Invested Amount
<S>                                                    <C>                <C>    
          Series 1998-2 Class B                        $44,736,860.00     8.9474%
</TABLE>

<TABLE>
<CAPTION>
     14.  Total Available Credit Enhancement Amounts
          ------------------------------------------
                                                  Shared Amount  Class B Amount
<S>                                                          <C>          <C>           
          Maximum Amount                                     $0.00        $21,052,640.00

          Available Amount                                   $0.00        $21,052,640.00

          Amount of Drawings on Credit Enhancement
            for this Due Period                              $0.00                 $0.00
</TABLE>



<PAGE>   4
<TABLE>
<CAPTION>
     15.  Delinquency Summary
          -------------------

          End of Due Period Master Trust Receivables Outstanding  $26,675,706,815.58

                              Delinquent Amount    Percentage of Ending
          Payment Status      Ending Balance      Receivables Outstanding
<S>                            <C>                      <C>  
          30-59 days              $628,092,799.56          2.35%

          60-179 days           $1,127,022,100.37          4.22%
</TABLE>


                                       U.S. BANK NATIONAL ASSOCIATION
                                       as Trustee


                                   BY:
                                       ----------------------------

                                             Vice President




<PAGE>   5


                     MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1998-2 Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

       The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of March 4, 1998 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1998-2 Master Trust Certificates for the Distribution Date
occurring on May 17, 1999:


<TABLE>
<S>                                                                                 <C>              
1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.       
                                                                                  
2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.       
                                                                                  
3.  The aggregate amount of Collections processed during the related Due          
    Period is equal to                                                              $4,233,324,936.71
                                                                                  
4.  The aggregate amount of Class A Principal Collections processed during        
    the related Due Period is equal to                                                 $72,862,750.48
                                                                                  
5.  The aggregate amount of Class A Finance Charge Collections processed          
    during the related Due Period is equal to                                           $7,621,223.22
                                                                                  
6a. The aggregate amount of Class A Principal Collections recharacterized as      
    Series Yield Collections during the related Due Period is equal to                          $0.00
                                                                                  
6b. The aggregate amount of Class A Additional Funds for this Distribution        
    date is equal to                                                                            $0.00
                                                                                  
 7. The amount of drawings under the Credit Enhancement required to be           
    made on the related Drawing Date pursuant to the Series Supplement:          
                                                                                  
    (a)  with respect to the Class A Required Amount Shortfall                                  $0.00
         is equal to                                                             
                                                                                  
    (b)  with respect to the Class A Cumulative Investor Charged-Off                            $0.00
         Amount is equal to                                                      
                                                                                  
    (c)  with respect to the Class A Investor Interest is equal to                              $0.00
                                                                                  
8.  The sum of all amounts payable to the Class A Certificateholders              
    on the current Distribution Date is equal to                                                $0.00
</TABLE>


<PAGE>   6



<TABLE>
<S>                                                                                 <C>              
      9.  The aggregate amount of Class B Principal Collections processed during
          the related Due Period is equal to                                            $3,836,293.56

     10.  The aggregate amount of Class B Finance Charge Collections processed
          during the related Due Period is equal to                                       $401,264.70

     11a. The aggregate amount of Class B Principal Collections recharacterized as
          Series Yield Collections during the related Due Period is equal to                    $0.00

     11b. The aggregate amount of Class B Additional Funds for this Distribution
          date is equal to                                                                      $0.00

     12.  The amount of drawings under the Credit Enhancement required to be
          made on the related Drawing Date pursuant to the Series Supplement:

          (a)  with respect to the Class B Required Amount Shortfall                            $0.00
               is equal to

          (b)  with respect to the Class B Cumulative Investor Charged-Off                      $0.00
               Amount is equal to

          (c)  with respect to the Class B Investor Interest is equal to                        $0.00

     13.  The sum of all amounts payable to the Class B Certificateholders
          on the current Distribution Date is equal to                                          $0.00

     14.  Attached hereto is a true copy of the statement required to be delivered by
          the Master Servicer on the date of this Certificate to the Trustee pursuant to
          Section 16 of the Series Supplement.
</TABLE>

          IN WITNESS WHEREOF, the undersigned has duly executed and delivered
      certificate this 17th day of May, 1999.



                                GREENWOOD TRUST COMPANY
                                  as Master Servicer

                                By:
                                   -------------------------
                                Vice President, Chief Accounting Officer,
                                and Treasurer

<PAGE>   1
                                                                     EXHIBIT (T)



                         MONTHLY CERTIFICATEHOLDERS' STATEMENT
                             Discover Card Master Trust I
                            Series 1998-3 Monthly Statement
                        Class A Certificate CUSIP #25466KBR9
                        Class B Certificate CUSIP #25466KBS7


Trust Distribution Date: May 17, 1999        Due Period Ending:  April 30, 1999

Pursuant to the Series Supplement dated as of March 25, 1998 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<CAPTION>
1.   Payments for the benefit of Series Investors this Due Period (per $1000 of Class Initial Investor Interest)
     -----------------------------------------------------------------------------------------------------------

     Series  1998-3                            Total                Interest     Principal
         <S>                                   <C>               <C>            <C>         
         Class A      32 days at 5.051250000%  $4.490000000      $4.490000000   $0.000000000

         Class B      32 days at 5.216250000%  $4.636666667      $4.636666667   $0.000000000
</TABLE>

<TABLE>
<CAPTION>
2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------
<S>                                                    <C>               
 (a) Aggregate Investor Interest                        $20,624,749,676.00
     Seller Interest                                     $5,632,195,899.94

     Total Master Trust                                 $26,256,945,575.94


 (b) Group One Investor Interest                        $18,074,749,676.00

 (c) Group Two Investor Interest                         $2,550,000,000.00

 (d) Series 1998-3 Investor Interest                       $789,474,000.00

 (e) Class A Investor Interest                             $750,000,000.00

     Class B Investor Interest                              $39,474,000.00
</TABLE>

<TABLE>
<CAPTION>
3.   Allocation of Receivables Collected During the Due Period
     ---------------------------------------------------------

                                                             Finance Charge              Principal             Yield
                                                              Collections               Collections         Collections
<S>                                                              <C>                   <C>                          <C> 
 (a) Allocation of Collections between Investor and Seller

     Aggregate Investor Allocation.                              $316,121,219.78       $3,022,278,825.29            $0.00

     Seller:                                                      $84,742,614.59         $810,182,277.03            $0.00

 (b) Group One Allocation                                        $277,252,259.81       $2,650,671,899.42            $0.00

 (c) Group Two Allocation                                         $38,868,959.97         $371,606,925.87            $0.00

 (d) Series 1998-3 Allocations                                    $12,033,531.44         $115,046,649.83            $0.00

 (e) Class A Allocations                                          $11,431,834.83         $109,294,125.72            $0.00

     Class B Allocations                                             $601,696.61           $5,752,524.11            $0.00
</TABLE>


<PAGE>   2

<TABLE>
<CAPTION>
4.   Information Concerning the Series Principal Funding Accounts ("SPFA")
     ---------------------------------------------------------------------
                         Deposits into the
                          SPFAs This        SPFA    Deposit Deficit Investment
                          Due Period       Balance    Amount         Income
<S>                          <C>           <C>           <C>          <C>  
     Series 1998-3           $0.00         $0.00         0.00         $0.00
</TABLE>

<TABLE>
<CAPTION>
5.   Information Concerning Amount of Controlled Liquidation Payments
     ----------------------------------------------------------------
                                                              Total Payments
                              Amount Paid    Deficit Amount   Through This
                             This Due Period This Due Period   Due Period

<S>                                <C>              <C>               <C>  
     Series 1998-3                 $0.00            $0.00             $0.00
</TABLE>

<TABLE>
<CAPTION>
6.   Information Concerning the Series Interest Funding Accounts ("SIFA")
     --------------------------------------------------------------------
                                            Deposits Into the
                                              SIFAs This
                                              Due Period     SIFA Balance
<S>                                        <C>                      <C>  
     Series 1998-3                         $3,550,527.78            $0.00
</TABLE>

<TABLE>
<CAPTION>
7.   Pool Factors
     ------------
                                                            This Due Period
<S>                                                          <C>       
     Class A                                                 1.00000000

     Class B                                                 1.00000000
</TABLE>

<TABLE>
<CAPTION>
8.   Investor Charged-Off Amount
     ---------------------------
                                                                Cumulative
                                                             Investor Charged-Off
                                            This Due Period      Amount

<S>                                       <C>                       <C>  
 (a) Group One                            $86,442,427.02            $0.00

 (b) Group Two                            $12,118,664.92            $0.00

 (c) Series 1998-3                         $3,751,845.57            $0.00

 (d) Class A                               $3,564,247.04            $0.00

     Class B                                 $187,598.53            $0.00
</TABLE>

<TABLE>
<CAPTION>
9.   Investor Losses This Due Period
     -------------------------------
                                                             Per $1,000 of
                                                            Original Invested
                                                 Total        Principal
<S>                                                <C>            <C>  
 (a) Group One                                     $0.00          $0.00

 (b) Group Two                                     $0.00          $0.00

 (c) Series 1998-3                                 $0.00          $0.00

 (d) Class A                                       $0.00          $0.00

     Class B                                       $0.00          $0.00
</TABLE>



<PAGE>   3


<TABLE>
<CAPTION>
10.  Reimbursement of Investor Losses This Due Period
     ------------------------------------------------
                                                              Per $1,000 of
                                                            Original Invested
                                                 Total        Principal
<S>                                                <C>            <C>  
 (a) Group One                                     $0.00          $0.00

 (b) Group Two                                     $0.00          $0.00

 (c) Series 1998-3                                 $0.00          $0.00

 (d) Class A                                       $0.00          $0.00

     Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
11.  Aggregate Amount of Unreimbursed Investor Losses        
     ------------------------------------------------        Per $1,000 of
                                                            Original Invested
                                                 Total        Principal
<S>                                                <C>            <C>  
 (a) Group One                                     $0.00          $0.00

 (b) Group Two                                     $0.00          $0.00

 (c) Series 1998-3                                 $0.00          $0.00

 (d) Class A                                       $0.00          $0.00

     Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
     -------------------------------------------------------------------

<S>                                                       <C>           
 (a) Group One                                            $30,315,482.22

 (b) Group Two                                             $4,250,000.00

 (c) Series 1998-3                                         $1,315,790.00

 (d) Class A                                               $1,250,000.00

     Class B                                                  $65,790.00
</TABLE>

<TABLE>
<CAPTION>
13.  Class Available Subordinated Amount at the end of the Due Period
     ----------------------------------------------------------------
                                                             As a Percentage
                                                               of Class A
                                                 Total       Invested Amount

<S>                                          <C>               <C>     
     Series 1998-3 Class B                   $98,684,250.00    13.1579%
</TABLE>

<TABLE>
<CAPTION>
14.  Total Available Credit Enhancement Amounts
     ------------------------------------------

                                             Shared Amount  Class B Amount
<S>                                                <C>     <C>           
     Maximum Amount                                $0.00   $59,210,550.00

     Available Amount                              $0.00   $59,210,550.00

     Amount of Drawings on Credit Enhancement
       for this Due Period                         $0.00            $0.00
</TABLE>



<PAGE>   4



<TABLE>
<CAPTION>
15.  Delinquency Summary
     -------------------

     End of Due Period Master Trust Receivables Outstanding      $26,675,706,815.58

                         Delinquent Amount  Percentage of Ending
     Payment Status      Ending Balance     Receivables Outstanding
     <S>              <C>                        <C>  
     30-59 days         $628,092,799.56          2.35%

     60-179 days      $1,127,022,100.37          4.22%
</TABLE>


                                 U.S. BANK NATIONAL ASSOCIATION
                                 as Trustee


                              BY: 
                                  ----------------------------

                                        Vice President

<PAGE>   5
                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1998-3 Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

      The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of March 25, 1998 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1998-3 Master Trust Certificates for the Distribution Date
occurring on May 17, 1999:


<TABLE>
<S>                                                                             <C>
1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement 

2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer 

3.  The aggregate amount of Collections processed during the related Due
    Period is equal to                                                            $4,233,324,936.71

4.  The aggregate amount of Class A Principal Collections processed during
    the related Due Period is equal to                                              $109,294,125.72

5.  The aggregate amount of Class A Finance Charge Collections processed
    during the related Due Period is equal to                                        $11,431,834.83

6a. The aggregate amount of Class A Principal Collections recharacterized as
    Series Yield Collections during the related Due Period is equal to                       $0.00

6b. The aggregate amount of Class A Additional Funds for this Distribution
    date is equal to                                                                         $0.00

 7. The amount of drawings under the Credit Enhancement required to be
    made on the related Drawing Date pursuant to the Series Supplement:

    (a)  with respect to the Class A Required Amount Shortfall                               $0.00
          is equal to

    (b)  with respect to the Class A Cumulative Investor Charged-Off                         $0.00
          Amount is equal to

    (c)  with respect to the Class A Investor Interest is equal to                           $0.00

8.  The sum of all amounts payable to the Class A Certificateholders
    on the current Distribution Date is equal to                                     $3,367,500.00
</TABLE>




<PAGE>   6





<TABLE>
<S>                                                                             <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                            $5,752,524.11

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                       $601,696.61

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                    $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution
     date is equal to                                                                      $0.00

 12. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall                            $0.00
          is equal to

     (b)  with respect to the Class B Cumulative Investor Charged-Off                      $0.00
          Amount is equal to

     (c)  with respect to the Class B Investor Interest is equal to                        $0.00

13.  The sum of all amounts payable to the Class B Certificateholders
     on the current Distribution Date is equal to                                    $183,027.78

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant to
     Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
 certificate this  17th day of May, 1999.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              -------------------------
                           Vice President, Chief Accounting Officer,
                           and Treasurer





<PAGE>   1
                                                                     EXHIBIT (U)




                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1998-4 Monthly Statement
                      Class A Certificate CUSIP #25466KBT5
                      Class B Certificate CUSIP #25466KBU2


Trust Distribution Date: May 17, 1999        Due Period Ending:  April 30, 1999

Pursuant to the Series Supplement dated as of April 9, 1998 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<CAPTION>
1.   Payments for the benefit of Series Investors this Due Period (per $1000 of Class Initial Investor Interest)
     -----------------------------------------------------------------------------------------------------------

     Series  1998-4                                    Total            Interest       Principal
<S>                                               <C>                 <C>           <C>         
         Class A      30 days at 5.750000000%     $4.791666667        $4.791666667  $0.000000000

         Class B      30 days at 5.900000000%     $4.916666667        $4.916666667  $0.000000000
</TABLE>

<TABLE>
<CAPTION>
2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------

<S>                                                    <C>               
 (a) Aggregate Investor Interest                        $20,624,749,676.00
     Seller Interest                                     $5,632,195,899.94

     Total Master Trust                                 $26,256,945,575.94


 (b) Group One Investor Interest                        $18,074,749,676.00

 (c) Group Two Investor Interest                         $2,550,000,000.00

 (d) Series 1998-4 Investor Interest                       $526,316,000.00

 (e) Class A Investor Interest                             $500,000,000.00

     Class B Investor Interest                              $26,316,000.00
</TABLE>

<TABLE>
<CAPTION>
3.   Allocation of Receivables Collected During the Due Period
     ---------------------------------------------------------

                                                                  Finance Charge         Principal           Yield
                                                                   Collections          Collections        Collections

<S>                                                              <C>               <C>                          <C>  
 (a) Allocation of Collections between Investor and Seller

     Aggregate Investor Allocation.                              $316,121,219.78   $3,022,278,825.29            $0.00

     Seller:                                                      $84,742,614.59     $810,182,277.03            $0.00

 (b) Group One Allocation                                        $277,252,259.81   $2,650,671,899.42            $0.00

 (c) Group Two Allocation                                         $38,868,959.97     $371,606,925.87            $0.00

 (d) Series 1998-4 Allocations                                     $8,022,487.92      $76,699,044.04            $0.00

 (e) Class A Allocations                                           $7,621,223.22      $72,862,750.48            $0.00

     Class B Allocations                                             $401,264.70       $3,836,293.56            $0.00
</TABLE>


<PAGE>   2



<TABLE>
<CAPTION>
4.   Information Concerning the Series Principal Funding Accounts ("SPFA")
     ---------------------------------------------------------------------
                         Deposits into the
                          SPFAs This        SPFA    Deposit Deficit Investment
                          Due Period       Balance    Amount         Income

<S>                          <C>           <C>           <C>          <C>  
     Series 1998-4           $0.00         $0.00         0.00         $0.00
</TABLE>

<TABLE>
<CAPTION>
5.   Information Concerning Amount of Controlled Liquidation Payments
     ----------------------------------------------------------------
                                                              Total Payments
                              Amount Paid    Deficit Amount   Through This
                             This Due Period This Due Period   Due Period

<S>                                <C>              <C>               <C>  
     Series 1998-4                 $0.00            $0.00             $0.00
</TABLE>

<TABLE>
<CAPTION>
6.   Information Concerning the Series Interest Funding Accounts ("SIFA")
     --------------------------------------------------------------------
                                            Deposits Into the
                                              SIFAs This
                                              Due Period     SIFA Balance
<S>                                        <C>              <C>          
     Series 1998-4                         $2,525,220.33    $2,525,220.33
</TABLE>

<TABLE>
<CAPTION>
7.   Pool Factors
     ------------
                                                            This Due Period
<S>                                                          <C>       
     Class A                                                 1.00000000

     Class B                                                 1.00000000
</TABLE>

<TABLE>
<CAPTION>
8.   Investor Charged-Off Amount
     ---------------------------
                                                               Cumulative
                                                            Investor Charged-Off
                                            This Due Period     Amount
<S>                                       <C>                       <C>  
 (a) Group One                            $86,442,427.02            $0.00

 (b) Group Two                            $12,118,664.92            $0.00

 (c) Series 1998-4                         $2,501,272.05            $0.00

 (d) Class A                               $2,376,164.70            $0.00

     Class B                                 $125,107.35            $0.00
</TABLE>

<TABLE>
<CAPTION>
9.   Investor Losses This Due Period
     -------------------------------
                                                             Per $1,000 of
                                                            Original Invested
                                                 Total        Principal
<S>                                                <C>            <C>  
 (a) Group One                                     $0.00          $0.00

 (b) Group Two                                     $0.00          $0.00

 (c) Series 1998-4                                 $0.00          $0.00

 (d) Class A                                       $0.00          $0.00

     Class B                                       $0.00          $0.00
</TABLE>



<PAGE>   3



<TABLE>
<CAPTION>
10.  Reimbursement of Investor Losses This Due Period        
     ------------------------------------------------        Per $1,000 of
                                                            Original Invested
                                                 Total        Principal

<S>                                                <C>            <C>  
 (a) Group One                                     $0.00          $0.00

 (b) Group Two                                     $0.00          $0.00

 (c) Series 1998-4                                 $0.00          $0.00

 (d) Class A                                       $0.00          $0.00

     Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
11.  Aggregate Amount of Unreimbursed Investor Losses        
     ------------------------------------------------        Per $1,000 of
                                                            Original Invested
                                                 Total        Principal
<S>                                                <C>            <C>  
 (a) Group One                                     $0.00          $0.00

 (b) Group Two                                     $0.00          $0.00

 (c) Series 1998-4                                 $0.00          $0.00

 (d) Class A                                       $0.00          $0.00

     Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
     -------------------------------------------------------------------

<S>                                                       <C>           
 (a) Group One                                            $30,315,482.22

 (b) Group Two                                             $4,250,000.00

 (c) Series 1998-4                                           $877,193.33

 (d) Class A                                                 $833,333.33

     Class B                                                  $43,860.00
</TABLE>

<TABLE>
<CAPTION>
13.  Class Available Subordinated Amount at the end of the Due Period
     ----------------------------------------------------------------
                                                             As a Percentage
                                                               of Class A
                                                 Total       Invested Amount

<S>                                          <C>                <C>    
     Series 1998-4 Class B                   $44,736,860.00     8.9474%
</TABLE>

<TABLE>
<CAPTION>
14.  Total Available Credit Enhancement Amounts
     ------------------------------------------

                                             Shared Amount  Class B Amount

<S>                                                <C>     <C>           
     Maximum Amount                                $0.00   $21,052,640.00

     Available Amount                              $0.00   $21,052,640.00

     Amount of Drawings on Credit Enhancement
       for this Due Period                         $0.00            $0.00
</TABLE>




<PAGE>   4





<TABLE>
<CAPTION>
15.  Delinquency Summary
     -------------------

     End of Due Period Master Trust Receivables Outstanding      $26,675,706,815.58

                         Delinquent Amount  Percentage of Ending
     Payment Status      Ending Balance     Receivables Outstanding

<S>                   <C>                      <C>  
     30-59 days         $628,092,799.56          2.35%

     60-179 days      $1,127,022,100.37          4.22%
</TABLE>


                                 U.S. BANK NATIONAL ASSOCIATION
                                 as Trustee


                              BY: 
                                  ----------------------------

                                        Vice President


<PAGE>   5
                     MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1998-4 Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

      The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of April 9, 1998 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1998-4 Master Trust Certificates for the Distribution Date
occurring on May 17, 1999:


<TABLE>
<S>                                                                             <C>
1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement 

2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer 

3.  The aggregate amount of Collections processed during the related Due
    Period is equal to                                                            $4,233,324,936.71

4.  The aggregate amount of Class A Principal Collections processed during
    the related Due Period is equal to                                               $72,862,750.48

5.  The aggregate amount of Class A Finance Charge Collections processed
    during the related Due Period is equal to                                         $7,621,223.22

6a. The aggregate amount of Class A Principal Collections recharacterized as
    Series Yield Collections during the related Due Period is equal to                        $0.00

6b. The aggregate amount of Class A Additional Funds for this Distribution
    date is equal to                                                                          $0.00

 7. The amount of drawings under the Credit Enhancement required to be
    made on the related Drawing Date pursuant to the Series Supplement:

    (a)  with respect to the Class A Required Amount Shortfall                                $0.00
         is equal to

    (b)  with respect to the Class A Cumulative Investor Charged-Off                          $0.00
         Amount is equal to

    (c)  with respect to the Class A Investor Interest is equal to                            $0.00

8.  The sum of all amounts payable to the Class A Certificateholders
    on the current Distribution Date is equal to                                              $0.00
</TABLE>





<PAGE>   6







<TABLE>
<S>                                                                             <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                            $3,836,293.56

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                       $401,264.70

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                    $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution
     date is equal to                                                                      $0.00

 12. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall                            $0.00
          is equal to

     (b)  with respect to the Class B Cumulative Investor Charged-Off                      $0.00
          Amount is equal to

     (c)  with respect to the Class B Investor Interest is equal to                        $0.00

13.  The sum of all amounts payable to the Class B Certificateholders
     on the current Distribution Date is equal to                                          $0.00

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant to
     Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
 certificate this  17th day of May, 1999.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              -------------------------
                           Vice President, Chief Accounting Officer,
                           and Treasurer





<PAGE>   1
                                                                     EXHIBIT (V)





                    MONTHLY CERTIFICATEHOLDERS' STATEMENT
                        Discover Card Master Trust I
                       Series 1998-6 Monthly Statement
                   Class A Certificate CUSIP #25466KBY4
                   Class B Certificate CUSIP #25466KBZ1


Trust Distribution Date: May 17, 1999        Due Period Ending:  April 30, 1999

Pursuant to the Series Supplement dated as of July 30, 1998 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<CAPTION>
1.   Payments for the benefit of Series Investors this Due Period (per $1000 of Class Initial Investor Interest)
     -----------------------------------------------------------------------------------------------------------

     Series  1998-6                                  Total          Interest     Principal
<S>                                               <C>            <C>           <C>         
         Class A      30 days at 5.850000000%     $4.875000000   $4.875000000  $0.000000000

         Class B      30 days at 6.050000000%     $5.041666667   $5.041666667  $0.000000000
</TABLE>

<TABLE>
<CAPTION>
2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------

<S>                                                   <C>               
 (a) Aggregate Investor Interest                        $20,624,749,676.00
     Seller Interest                                     $5,632,195,899.94

     Total Master Trust                                 $26,256,945,575.94


 (b) Group One Investor Interest                        $18,074,749,676.00

 (c) Group Two Investor Interest                         $2,550,000,000.00

 (d) Series 1998-6 Investor Interest                       $526,316,000.00

 (e) Class A Investor Interest                             $500,000,000.00

     Class B Investor Interest                              $26,316,000.00
</TABLE>

<TABLE>
<CAPTION>
3.   Allocation of Receivables Collected During the Due Period
     ---------------------------------------------------------

                                                             Finance Charge          Principal        Yield
                                                              Collections           Collections     Collections

<S>                                                          <C>                <C>                          <C>  
 (a) Allocation of Collections between Investor and Seller

     Aggregate Investor Allocation.                          $316,121,219.78    $3,022,278,825.29            $0.00

     Seller:                                                  $84,742,614.59      $810,182,277.03            $0.00

 (b) Group One Allocation                                    $277,252,259.81    $2,650,671,899.42            $0.00

 (c) Group Two Allocation                                     $38,868,959.97      $371,606,925.87            $0.00

 (d) Series 1998-6 Allocations                                 $8,022,487.92       $76,699,044.04            $0.00

 (e) Class A Allocations                                       $7,621,223.22       $72,862,750.48            $0.00

     Class B Allocations                                         $401,264.70        $3,836,293.56            $0.00
</TABLE>



<PAGE>   2


<TABLE>
<CAPTION>
4.   Information Concerning the Series Principal Funding Accounts ("SPFA")
     ---------------------------------------------------------------------
                         Deposits into the
                          SPFAs This        SPFA    Deposit Deficit Investment
                          Due Period       Balance    Amount         Income
<S>                          <C>           <C>           <C>          <C>  
     Series 1998-6           $0.00         $0.00         0.00         $0.00
</TABLE>

<TABLE>
<CAPTION>
5.   Information Concerning Amount of Controlled Liquidation Payments
     ----------------------------------------------------------------
                                                              Total Payments
                              Amount Paid    Deficit Amount   Through This
                             This Due Period This Due Period   Due Period

<S>                                <C>              <C>               <C>  
     Series 1998-6                 $0.00            $0.00             $0.00
</TABLE>

<TABLE>
<CAPTION>
6.   Information Concerning the Series Interest Funding Accounts ("SIFA")
     --------------------------------------------------------------------
                                            Deposits Into the
                                              SIFAs This
                                              Due Period     SIFA Balance

<S>                                        <C>             <C>           
     Series 1998-6                         $2,570,176.50   $10,280,706.00
</TABLE>

<TABLE>
<CAPTION>
7.   Pool Factors
     ------------
                                                            This Due Period
<S>                                                          <C>       
     Class A                                                 1.00000000

     Class B                                                 1.00000000
</TABLE>

<TABLE>
<CAPTION>
8.   Investor Charged-Off Amount
     ---------------------------
                                                              Cumulative
                                                           Investor Charged-Off
                                            This Due Period    Amount
<S>                                       <C>                       <C>  
 (a) Group One                            $86,442,427.02            $0.00

 (b) Group Two                            $12,118,664.92            $0.00

 (c) Series 1998-6                         $2,501,272.05            $0.00

 (d) Class A                               $2,376,164.70            $0.00

     Class B                                 $125,107.35            $0.00
</TABLE>

<TABLE>
<CAPTION>
9.   Investor Losses This Due Period
     -------------------------------
                                                             Per $1,000 of
                                                            Original Invested
                                                 Total        Principal

<S>                                                <C>            <C>  
 (a) Group One                                     $0.00          $0.00

 (b) Group Two                                     $0.00          $0.00

 (c) Series 1998-6                                 $0.00          $0.00

 (d) Class A                                       $0.00          $0.00

     Class B                                       $0.00          $0.00
</TABLE>



<PAGE>   3






<TABLE>
<CAPTION>
10.  Reimbursement of Investor Losses This Due Period        
     ------------------------------------------------        Per $1,000 of
                                                            Original Invested
                                                 Total        Principal

<S>                                                <C>            <C>  
 (a) Group One                                     $0.00          $0.00

 (b) Group Two                                     $0.00          $0.00

 (c) Series 1998-6                                 $0.00          $0.00

 (d) Class A                                       $0.00          $0.00

     Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
11.  Aggregate Amount of Unreimbursed Investor Losses        
     ------------------------------------------------        Per $1,000 of
                                                            Original Invested
                                                 Total        Principal

<S>                                                <C>            <C>  
 (a) Group One                                     $0.00          $0.00

 (b) Group Two                                     $0.00          $0.00

 (c) Series 1998-6                                 $0.00          $0.00

 (d) Class A                                       $0.00          $0.00

     Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
     -------------------------------------------------------------------
<S>                                                       <C>           
 (a) Group One                                            $30,315,482.22

 (b) Group Two                                             $4,250,000.00

 (c) Series 1998-6                                           $877,193.33

 (d) Class A                                                 $833,333.33

     Class B                                                  $43,860.00
</TABLE>

<TABLE>
<CAPTION>
13.  Class Available Subordinated Amount at the end of the Due Period
     ----------------------------------------------------------------
                                                             As a Percentage
                                                               of Class A
                                                 Total       Invested Amount

<S>                                          <C>                <C>    
     Series 1998-6 Class B                   $44,736,860.00     8.9474%
</TABLE>

<TABLE>
<CAPTION>
14.  Total Available Credit Enhancement Amounts
     ------------------------------------------

                                             Shared Amount  Class B Amount

<S>                                                <C>     <C>           
     Maximum Amount                                $0.00   $21,052,640.00

     Available Amount                              $0.00   $21,052,640.00

     Amount of Drawings on Credit Enhancement
       for this Due Period                         $0.00            $0.00
</TABLE>



<PAGE>   4






<TABLE>
<CAPTION>
15.  Delinquency Summary
     -------------------

     End of Due Period Master Trust Receivables Outstanding   $26,675,706,815.58

                         Delinquent Amount  Percentage of Ending
     Payment Status      Ending Balance     Receivables Outstanding

     <S>              <C>                        <C>  
     30-59 days         $628,092,799.56          2.35%

     60-179 days      $1,127,022,100.37          4.22%
</TABLE>


                                 U.S. BANK NATIONAL ASSOCIATION
                                 as Trustee


                              BY: 
                                  ----------------------------

                                        Vice President



<PAGE>   5
                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1998-6 Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

      The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of July 30, 1998 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1998-6 Master Trust Certificates for the Distribution Date
occurring on May 17, 1999:

<TABLE>
<S>                                                                            <C>
 1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.  The aggregate amount of Collections processed during the related Due
     Period is equal to                                                         $4,233,324,936.71

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                            $72,862,750.48

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                      $7,621,223.22

 6a. The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                     $0.00

 6b. The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                       $0.00

  7. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall                             $0.00
          is equal to

     (b)  with respect to the Class A Cumulative Investor Charged-Off                       $0.00
          Amount is equal to

     (c)  with respect to the Class A Investor Interest is equal to                         $0.00

 8.  The sum of all amounts payable to the Class A Certificateholders
     on the current Distribution Date is equal to                                           $0.00
</TABLE>



<PAGE>   6

<TABLE>
<S>                                                                             <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                             $3,836,293.56

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                        $401,264.70

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                     $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution
     date is equal to                                                                       $0.00

 12. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall                             $0.00
          is equal to

     (b)  with respect to the Class B Cumulative Investor Charged-Off                       $0.00
          Amount is equal to

     (c)  with respect to the Class B Investor Interest is equal to                         $0.00

13.  The sum of all amounts payable to the Class B Certificateholders
     on the current Distribution Date is equal to                                           $0.00

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant to
     Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
 certificate this  17th day of May, 1999.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              -------------------------
                           Vice President, Chief Accounting Officer,
                           and Treasurer


<PAGE>   1
                                                                     EXHIBIT (W)





                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1998-7 Monthly Statement
                      Class A Certificate CUSIP #25466KCA5
                      Class B Certificate CUSIP #25466KCB3


Trust Distribution Date: May 17, 1999        Due Period Ending:  April 30, 1999

Pursuant to the Series Supplement dated as of November 12, 1998 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<CAPTION>
1.   Payments for the benefit of Series Investors this Due Period (per $1000 of Class Initial Investor Interest)
     -----------------------------------------------------------------------------------------------------------

     Series  1998-7                               Total          Interest        Principal
<S>                                            <C>            <C>               <C>         
         Class A      30 days at 5.600000000%  $4.666666667   $4.666666667      $0.000000000

         Class B      30 days at 5.900000000%  $4.916666667   $4.916666667      $0.000000000
</TABLE>

<TABLE>
<CAPTION>
2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------

<S>                                                     <C>               
 (a) Aggregate Investor Interest                        $20,624,749,676.00
     Seller Interest                                     $5,632,195,899.94

     Total Master Trust                                 $26,256,945,575.94


 (b) Group One Investor Interest                        $18,074,749,676.00

 (c) Group Two Investor Interest                         $2,550,000,000.00

 (d) Series 1998-7 Investor Interest                     $1,052,632,000.00

 (e) Class A Investor Interest                           $1,000,000,000.00

     Class B Investor Interest                              $52,632,000.00
</TABLE>

<TABLE>
<CAPTION>
3.   Allocation of Receivables Collected During the Due Period
     ---------------------------------------------------------

                                                             Finance Charge         Principal        Yield
                                                              Collections          Collections     Collections
<S>                                                           <C>               <C>                          <C>  
 (a) Allocation of Collections between Investor and Seller

     Aggregate Investor Allocation.                           $316,121,219.78   $3,022,278,825.29            $0.00

     Seller:                                                   $84,742,614.59     $810,182,277.03            $0.00

 (b) Group One Allocation                                     $277,252,259.81   $2,650,671,899.42            $0.00

 (c) Group Two Allocation                                      $38,868,959.97     $371,606,925.87            $0.00

 (d) Series 1998-7 Allocations                                 $16,044,574.97     $153,394,255.62            $0.00

 (e) Class A Allocations                                       $15,242,446.44     $145,725,500.95            $0.00

     Class B Allocations                                          $802,128.53       $7,668,754.67            $0.00
</TABLE>


<PAGE>   2



<TABLE>
<CAPTION>
4.   Information Concerning the Series Principal Funding Accounts ("SPFA")
     ---------------------------------------------------------------------
                         Deposits into the
                          SPFAs This        SPFA    Deposit Deficit Investment
                          Due Period       Balance    Amount         Income
<S>                          <C>           <C>           <C>          <C>  
     Series 1998-7           $0.00         $0.00         0.00         $0.00
</TABLE>

<TABLE>
<CAPTION>
5.   Information Concerning Amount of Controlled Liquidation Payments
     ----------------------------------------------------------------
                                                              Total Payments
                              Amount Paid    Deficit Amount   Through This
                             This Due Period This Due Period   Due Period

<S>                                <C>              <C>               <C>  
     Series 1998-7                 $0.00            $0.00             $0.00
</TABLE>

<TABLE>
<CAPTION>
6.   Information Concerning the Series Interest Funding Accounts ("SIFA")
     --------------------------------------------------------------------
                                            Deposits Into the
                                              SIFAs This
                                              Due Period     SIFA Balance

<S>                                        <C>                      <C>  
     Series 1998-7                         $4,925,440.67            $0.00
</TABLE>

<TABLE>
<CAPTION>
7.   Pool Factors
     ------------
                                                            This Due Period
<S>                                                          <C>       
     Class A                                                 1.00000000

     Class B                                                 1.00000000
</TABLE>

<TABLE>
<CAPTION>
8.   Investor Charged-Off Amount
     ---------------------------
                                                               Cumulative
                                                            Investor Charged-Off
                                            This Due Period     Amount

<S>                                       <C>                       <C>  
 (a) Group One                            $86,442,427.02            $0.00

 (b) Group Two                            $12,118,664.92            $0.00

 (c) Series 1998-7                         $5,002,419.10            $0.00

 (d) Class A                               $4,752,329.39            $0.00

     Class B                                 $250,089.71            $0.00
</TABLE>

<TABLE>
<CAPTION>
9.   Investor Losses This Due Period
     -------------------------------
                                                             Per $1,000 of
                                                            Original Invested
                                                 Total        Principal

<S>                                                <C>            <C>  
 (a) Group One                                     $0.00          $0.00

 (b) Group Two                                     $0.00          $0.00

 (c) Series 1998-7                                 $0.00          $0.00

 (d) Class A                                       $0.00          $0.00

     Class B                                       $0.00          $0.00
</TABLE>




<PAGE>   3



<TABLE>
<CAPTION>
10.  Reimbursement of Investor Losses This Due Period        
     ------------------------------------------------        Per $1,000 of
                                                            Original Invested
                                                 Total        Principal

<S>                                                <C>            <C>  
 (a) Group One                                     $0.00          $0.00

 (b) Group Two                                     $0.00          $0.00

 (c) Series 1998-7                                 $0.00          $0.00

 (d) Class A                                       $0.00          $0.00

     Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
11.  Aggregate Amount of Unreimbursed Investor Losses        
     ------------------------------------------------        Per $1,000 of
                                                            Original Invested
                                                 Total        Principal

<S>                                                <C>            <C>  
 (a) Group One                                     $0.00          $0.00

 (b) Group Two                                     $0.00          $0.00

 (c) Series 1998-7                                 $0.00          $0.00

 (d) Class A                                       $0.00          $0.00

     Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
     -------------------------------------------------------------------

<S>                                                       <C>           
 (a) Group One                                            $30,315,482.22

 (b) Group Two                                             $4,250,000.00

 (c) Series 1998-7                                         $1,754,386.67

 (d) Class A                                               $1,666,666.67

     Class B                                                  $87,720.00
</TABLE>

<TABLE>
<CAPTION>
13.  Class Available Subordinated Amount at the end of the Due Period
     ----------------------------------------------------------------
                                                             As a Percentage
                                                               of Class A
                                                 Total       Invested Amount

<S>                                          <C>                <C>    
     Series 1998-7 Class B                   $89,473,720.00     8.9474%
</TABLE>

<TABLE>
<CAPTION>
14.  Total Available Credit Enhancement Amounts
     ------------------------------------------

                                             Shared Amount      Class B Amount  
                                                                                
<S>                                                <C>         <C>              
     Maximum Amount                                $0.00       $42,105,280.00   
                                                                                
     Available Amount                              $0.00       $42,105,280.00   
                                                                                
     Amount of Drawings on Credit Enhancement                                   
       for this Due Period                         $0.00                $0.00   
</TABLE>                                                      


<PAGE>   4


<TABLE>
<CAPTION>
15.  Delinquency Summary
     -------------------

     End of Due Period Master Trust Receivables Outstanding      $26,675,706,815.58

                         Delinquent Amount  Percentage of Ending
     Payment Status      Ending Balance     Receivables Outstanding

     <S>              <C>                        <C>  
     30-59 days         $628,092,799.56          2.35%

     60-179 days      $1,127,022,100.37          4.22%
</TABLE>


                                 U.S. BANK NATIONAL ASSOCIATION
                                 as Trustee


                              BY: 
                                  ----------------------------

                                        Vice President



<PAGE>   5
                     MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1998-7 Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

      The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of November 12, 1998 (the "Series Supplement")
by and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1998-7 Master Trust Certificates for the Distribution Date
occurring on May 17, 1999:


<TABLE>
<S>                                                                             <C>
1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement 

2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer 

3.  The aggregate amount of Collections processed during the related Due
    Period is equal to                                                             $4,233,324,936.71

4.  The aggregate amount of Class A Principal Collections processed during
    the related Due Period is equal to                                               $145,725,500.95

5.  The aggregate amount of Class A Finance Charge Collections processed
    during the related Due Period is equal to                                         $15,242,446.44

6a. The aggregate amount of Class A Principal Collections recharacterized as
    Series Yield Collections during the related Due Period is equal to                         $0.00

6b. The aggregate amount of Class A Additional Funds for this Distribution
    date is equal to                                                                           $0.00

 7. The amount of drawings under the Credit Enhancement required to be
    made on the related Drawing Date pursuant to the Series Supplement:

    (a)  with respect to the Class A Required Amount Shortfall                                 $0.00
         is equal to

    (b)  with respect to the Class A Cumulative Investor Charged-Off                           $0.00
         Amount is equal to

    (c)  with respect to the Class A Investor Interest is equal to                             $0.00

8.  The sum of all amounts payable to the Class A Certificateholders
    on the current Distribution Date is equal to                                      $28,466,666.68
</TABLE>

<PAGE>   6



<TABLE>
<S>                                                                             <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                             $7,668,754.67

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                        $802,128.53

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                     $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution
     date is equal to                                                                       $0.00

 12. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall                             $0.00
          is equal to

     (b)  with respect to the Class B Cumulative Investor Charged-Off                       $0.00
          Amount is equal to

     (c)  with respect to the Class B Investor Interest is equal to                         $0.00

13.  The sum of all amounts payable to the Class B Certificateholders
     on the current Distribution Date is equal to                                   $1,578,521.40

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant to
     Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
 certificate this  17th day of May, 1999.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              -------------------------
                           Vice President, Chief Accounting Officer,
                           and Treasurer





<PAGE>   1
                                                                     EXHIBIT (X)


                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1999-1 Monthly Statement
                      Class A Certificate CUSIP #25466KCC1
                      Class B Certificate CUSIP #25466KCD9


Trust Distribution Date: May 17, 1999        Due Period Ending:  April 30, 1999

Pursuant to the Series Supplement dated as of February 9, 1999 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<CAPTION>
1.   Payments for the benefit of Series Investors this Due Period (per $1000 of Class Initial Investor Interest)
     -----------------------------------------------------------------------------------------------------------

     Series  1999-1                               Total             Interest     Principal
<S>                                            <C>               <C>            <C>         
         Class A      30 days at 5.300000000%  $4.416666667      $4.416666667   $0.000000000

         Class B      30 days at 5.550000000%  $4.625000000      $4.625000000   $0.000000000
</TABLE>

<TABLE>
<CAPTION>
2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------

<S>                                                     <C>               
 (a) Aggregate Investor Interest                        $20,624,749,676.00
     Seller Interest                                     $5,632,195,899.94

     Total Master Trust                                 $26,256,945,575.94


 (b) Group One Investor Interest                        $18,074,749,676.00

 (c) Group Two Investor Interest                         $2,550,000,000.00

 (d) Series 1999-1 Investor Interest                       $526,316,000.00

 (e) Class A Investor Interest                             $500,000,000.00

     Class B Investor Interest                              $26,316,000.00
</TABLE>

<TABLE>
<CAPTION>
3.   Allocation of Receivables Collected During the Due Period
     ---------------------------------------------------------

                                                             Finance Charge        Principal        Yield
                                                              Collections         Collections     Collections

<S>                                                         <C>               <C>                          <C>  
 (a) Allocation of Collections between Investor and Seller

     Aggregate Investor Allocation.                         $316,121,219.78   $3,022,278,825.29            $0.00

     Seller:                                                 $84,742,614.59     $810,182,277.03            $0.00

 (b) Group One Allocation                                   $277,252,259.81   $2,650,671,899.42            $0.00

 (c) Group Two Allocation                                    $38,868,959.97     $371,606,925.87            $0.00

 (d) Series 1999-1 Allocations                                $8,022,487.92      $76,699,044.04            $0.00

 (e) Class A Allocations                                      $7,621,223.22      $72,862,750.48            $0.00

     Class B Allocations                                        $401,264.70       $3,836,293.56            $0.00
</TABLE>



<PAGE>   2


<TABLE>
<CAPTION>
4.   Information Concerning the Series Principal Funding Accounts ("SPFA")
     ---------------------------------------------------------------------
                         Deposits into the
                          SPFAs This        SPFA    Deposit Deficit Investment
                          Due Period       Balance    Amount         Income

<S>                          <C>           <C>           <C>          <C>  
     Series 1999-1           $0.00         $0.00         0.00         $0.00
</TABLE>

<TABLE>
<CAPTION>
5.   Information Concerning Amount of Controlled Liquidation Payments
     ----------------------------------------------------------------
                                                              Total Payments
                              Amount Paid    Deficit Amount   Through This
                             This Due Period This Due Period   Due Period

<S>                                <C>              <C>               <C>  
     Series 1999-1                 $0.00            $0.00             $0.00
</TABLE>

<TABLE>
<CAPTION>
6.   Information Concerning the Series Interest Funding Accounts ("SIFA")
     --------------------------------------------------------------------
                                            Deposits Into the
                                              SIFAs This
                                              Due Period     SIFA Balance

<S>                                        <C>              <C>          
     Series 1999-1                         $2,330,044.83    $7,456,143.46
</TABLE>

<TABLE>
<CAPTION>
7.   Pool Factors
     ------------
                                                            This Due Period
<S>                                                          <C>       
     Class A                                                 1.00000000

     Class B                                                 1.00000000
</TABLE>

<TABLE>
<CAPTION>
8.   Investor Charged-Off Amount
     ---------------------------
                                                              Cumulative
                                                           Investor Charged-Off
                                            This Due Period    Amount

<S>                                       <C>                       <C>  
 (a) Group One                            $86,442,427.02            $0.00

 (b) Group Two                            $12,118,664.92            $0.00

 (c) Series 1999-1                         $2,501,272.05            $0.00

 (d) Class A                               $2,376,164.70            $0.00

     Class B                                 $125,107.35            $0.00
</TABLE>

<TABLE>
<CAPTION>
9.   Investor Losses This Due Period
     -------------------------------
                                                             Per $1,000 of
                                                            Original Invested
                                                 Total        Principal
<S>                                                <C>            <C>  
 (a) Group One                                     $0.00          $0.00

 (b) Group Two                                     $0.00          $0.00

 (c) Series 1999-1                                 $0.00          $0.00

 (d) Class A                                       $0.00          $0.00

     Class B                                       $0.00          $0.00
</TABLE>




<PAGE>   3





<TABLE>
<CAPTION>
10.  Reimbursement of Investor Losses This Due Period        
     ------------------------------------------------        Per $1,000 of
                                                            Original Invested
                                                 Total        Principal
<S>                                                <C>            <C>  
 (a) Group One                                     $0.00          $0.00

 (b) Group Two                                     $0.00          $0.00

 (c) Series 1999-1                                 $0.00          $0.00

 (d) Class A                                       $0.00          $0.00

     Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
11.  Aggregate Amount of Unreimbursed Investor Losses        
     ------------------------------------------------        Per $1,000 of
                                                            Original Invested
                                                 Total        Principal

<S>                                                <C>            <C>  
 (a) Group One                                     $0.00          $0.00

 (b) Group Two                                     $0.00          $0.00

 (c) Series 1999-1                                 $0.00          $0.00

 (d) Class A                                       $0.00          $0.00

     Class B                                       $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
     -------------------------------------------------------------------
<S>                                                       <C>           
 (a) Group One                                            $30,315,482.22

 (b) Group Two                                             $4,250,000.00

 (c) Series 1999-1                                           $877,193.33

 (d) Class A                                                 $833,333.33

     Class B                                                  $43,860.00
</TABLE>

<TABLE>
<CAPTION>
13.  Class Available Subordinated Amount at the end of the Due Period
     ----------------------------------------------------------------
                                                             As a Percentage
                                                               of Class A
                                                 Total       Invested Amount

<S>                                          <C>                <C>    
     Series 1999-1 Class B                   $44,736,860.00     8.9474%
</TABLE>

<TABLE>
<CAPTION>
14.  Total Available Credit Enhancement Amounts
     ------------------------------------------

                                             Shared Amount  Class B Amount

<S>                                                <C>     <C>           
     Maximum Amount                                $0.00   $21,052,640.00

     Available Amount                              $0.00   $21,052,640.00

     Amount of Drawings on Credit Enhancement
       for this Due Period                         $0.00            $0.00
</TABLE>



<PAGE>   4






<TABLE>
<CAPTION>
15.  Delinquency Summary
     -------------------

     End of Due Period Master Trust Receivables Outstanding   $26,675,706,815.58

                         Delinquent Amount  Percentage of Ending
     Payment Status      Ending Balance     Receivables Outstanding

     <S>              <C>                        <C>  
     30-59 days         $628,092,799.56          2.35%

     60-179 days      $1,127,022,100.37          4.22%
</TABLE>


                                 U.S. BANK NATIONAL ASSOCIATION
                                 as Trustee


                              BY: 
                                  ----------------------------

                                        Vice President



<PAGE>   5


                     MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1999-1 Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

      The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of February 9, 1999 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1999-1 Master Trust Certificates for the Distribution Date
occurring on May 17, 1999:


<TABLE>
<S>                                                                             <C>
1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement 

2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer 

3.  The aggregate amount of Collections processed during the related Due
    Period is equal to                                                            $4,233,324,936.71

4.  The aggregate amount of Class A Principal Collections processed during
    the related Due Period is equal to                                               $72,862,750.48

5.  The aggregate amount of Class A Finance Charge Collections processed
    during the related Due Period is equal to                                         $7,621,223.22

6a. The aggregate amount of Class A Principal Collections recharacterized as
    Series Yield Collections during the related Due Period is equal to                        $0.00

6b. The aggregate amount of Class A Additional Funds for this Distribution
    date is equal to                                                                          $0.00

 7. The amount of drawings under the Credit Enhancement required to be
    made on the related Drawing Date pursuant to the Series Supplement:

    (a)  with respect to the Class A Required Amount Shortfall                                $0.00
         is equal to

    (b)  with respect to the Class A Cumulative Investor Charged-Off                          $0.00
         Amount is equal to

    (c)  with respect to the Class A Investor Interest is equal to                            $0.00

8.  The sum of all amounts payable to the Class A Certificateholders
    on the current Distribution Date is equal to                                              $0.00
</TABLE>


<PAGE>   6



<TABLE>
<S>                                                                             <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                               $3,836,293.56

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                          $401,264.70

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                       $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution
     date is equal to                                                                         $0.00

 12. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall                               $0.00
          is equal to

     (b)  with respect to the Class B Cumulative Investor Charged-Off                         $0.00
          Amount is equal to

     (c)  with respect to the Class B Investor Interest is equal to                           $0.00

13.  The sum of all amounts payable to the Class B Certificateholders
     on the current Distribution Date is equal to                                             $0.00

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant to
     Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
 certificate this  17th day of May, 1999.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              -------------------------
                           Vice President, Chief Accounting Officer,
                           and Treasurer





<PAGE>   1

                                                                     EXHIBIT (Y)

                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1999-2 Monthly Statement
                      Class A Certificate CUSIP #25466KCE7
                      Class B Certificate CUSIP #25466KCF4

Trust Distribution Date: May 17, 1999         Due Period Ending:  April 30, 1999

Pursuant to the Series Supplement dated as of March 10, 1999 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<CAPTION>
1.     Payments for the benefit of Series Investors this Due Period (per $1000 of Class Initial Investor Interest)
       -----------------------------------------------------------------------------------------------------------

       Series  1999-2                                         Total              Interest           Principal
            <S>           <C>                             <C>                  <C>                <C>
            Class A       30 days at 5.900000000%         $4.916666667         $4.916666667       $0.000000000

            Class B       30 days at 6.100000000%         $5.083333333         $5.083333333       $0.000000000
</TABLE>

<TABLE>
<CAPTION>
2.     Principal Receivables at the end of the Due Period
       --------------------------------------------------
<S>                                                         <C>
   (a) Aggregate Investor Interest                           $20,624,749,676.00
       Seller Interest                                        $5,632,195,899.94

       Total Master Trust                                    $26,256,945,575.94

   (b) Group One Investor Interest                           $18,074,749,676.00

   (c) Group Two Investor Interest                            $2,550,000,000.00

   (d) Series 1999-2 Investor Interest                          $526,316,000.00

   (e) Class A Investor Interest                                $500,000,000.00

       Class B Investor Interest                                 $26,316,000.00
</TABLE>

<TABLE>
<CAPTION>
3.     Allocation of Receivables Collected During the Due Period
       ---------------------------------------------------------

                                                                   Finance Charge          Principal        Yield
                                                                     Collections          Collections     Collections
   <S>                                                            <C>                 <C>                   <C>
   (a) Allocation of Collections between Investor and Seller

       Aggregate Investor Allocation                              $316,121,219.78     $3,022,278,825.29     $0.00

       Seller:                                                    $ 84,742,614.59     $  810,182,277.03     $0.00

   (b) Group One Allocation                                       $277,252,259.81     $2,650,671,899.42     $0.00

   (c) Group Two Allocation                                       $ 38,868,959.97     $  371,606,925.87     $0.00

   (d) Series 1999-2 Allocations                                  $  8,022,487.92     $   76,699,044.04     $0.00

   (e) Class A Allocations                                        $  7,621,223.22     $   72,862,750.48     $0.00

       Class B Allocations                                        $    401,264.70     $    3,836,293.56     $0.00
</TABLE>

<PAGE>   2


<TABLE>
<CAPTION>
4.     Information Concerning the Series Principal Funding Accounts ("SPFA")
       ---------------------------------------------------------------------
                        Deposits into the
                           SPFAs This        SPFA    Deposit Deficit   Investment
                           Due Period       Balance       Amount         Income
       <S>                   <C>             <C>           <C>            <C>
       Series 1999-2         $0.00           $0.00         0.00           $0.00
</TABLE>

<TABLE>
<CAPTION>
5.     Information Concerning Amount of Controlled Liquidation Payments
       ----------------------------------------------------------------
                                                                 Total Payments
                              Amount Paid      Deficit Amount     Through This
                            This Due Period    This Due Period     Due Period
       <S>                       <C>                <C>               <C>
       Series 1999-2             $0.00              $0.00             $0.00
</TABLE>

<TABLE>
<CAPTION>
6.     Information Concerning the Series Interest Funding Accounts ("SIFA")
       --------------------------------------------------------------------
                                    Deposits Into the
                                        SIFAs This
                                        Due Period           SIFA Balance
       <S>                            <C>                   <C>
       Series 1999-2                  $2,592,106.33         $5,616,230.39
</TABLE>

<TABLE>
<CAPTION>
7.     Pool Factors
       ------------
                                                                 This Due Period
       <S>                                                        <C>
       Class A                                                    1.00000000

       Class B                                                    1.00000000
</TABLE>

<TABLE>
<CAPTION>
8.     Investor Charged-Off Amount
       ---------------------------                                   Cumulative
                                                                Investor Charged-Off
                                              This Due Period          Amount

   <S>                                         <C>                       <C>
   (a) Group One                               $86,442,427.02            $0.00

   (b) Group Two                               $12,118,664.92            $0.00

   (c) Series 1999-2                            $2,501,272.05            $0.00

   (d) Class A                                  $2,376,164.70            $0.00

       Class B                                    $125,107.35            $0.00
</TABLE>

<TABLE>
<CAPTION>
9.     Investor Losses This Due Period
       -------------------------------                         Per $1,000 of
                                                             Original Invested
                                                    Total        Principal
   <S>                                              <C>            <C>
   (a) Group One                                    $0.00          $0.00

   (b) Group Two                                    $0.00          $0.00

   (c) Series 1999-2                                $0.00          $0.00

   (d) Class A                                      $0.00          $0.00

       Class B                                      $0.00          $0.00
</TABLE>

<PAGE>   3

<TABLE>
<CAPTION>
10.    Reimbursement of Investor Losses This Due Period
       ------------------------------------------------            Per $1,000 of
                                                                 Original Invested
                                                        Total        Principal
   <S>                                                  <C>            <C>
   (a) Group One                                        $0.00          $0.00

   (b) Group Two                                        $0.00          $0.00

   (c) Series 1999-2                                    $0.00          $0.00

   (d) Class A                                          $0.00          $0.00

       Class B                                          $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
11.    Aggregate Amount of Unreimbursed Investor Losses
       ------------------------------------------------           Per $1,000 of
                                                                Original Invested
                                                        Total        Principal
   <S>                                                  <C>            <C>
   (a) Group One                                        $0.00          $0.00

   (b) Group Two                                        $0.00          $0.00

   (c) Series 1999-2                                    $0.00          $0.00

   (d) Class A                                          $0.00          $0.00

       Class B                                          $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
12.    Investor Monthly Servicing Fee Payable at the end of the Due Period
       -------------------------------------------------------------------
   <S>                                                         <C>
   (a) Group One                                               $30,315,482.22

   (b) Group Two                                                $4,250,000.00

   (c) Series 1999-2                                              $877,193.33

   (d) Class A                                                    $833,333.33

       Class B                                                     $43,860.00
</TABLE>

<TABLE>
<CAPTION>
13.    Class Available Subordinated Amount at the end of the Due Period
       ----------------------------------------------------------------
                                                                  As a Percentage
                                                                    of Class A
                                                      Total       Invested Amount
       <S>                                        <C>                 <C>
       Series 1999-2 Class B                      $44,736,860.00      8.9474%
</TABLE>

<TABLE>
<CAPTION>
14.    Total Available Credit Enhancement Amounts
       ------------------------------------------

                                             Shared Amount        Class B Amount
       <S>                                           <C>          <C>
       Maximum Amount                                $0.00        $21,052,640.00

       Available Amount                              $0.00        $21,052,640.00

       Amount of Drawings on Credit Enhancement
         for this Due Period                         $0.00                 $0.00
</TABLE>

<PAGE>   4

<TABLE>
<CAPTION>
15.    Delinquency Summary
       -------------------

       End of Due Period Master Trust Receivables Outstanding         $26,675,706,815.58

                                     Delinquent Amount      Percentage of Ending
       Payment Status                 Ending Balance        Receivables Outstanding
       <S>                          <C>                            <C>

       30-59 days                   $  628,092,799.56               2.35%

       60-179 days                  $1,127,022,100.37               4.22%
</TABLE>


                                      U.S. BANK NATIONAL ASSOCIATION
                                      as Trustee


                                  BY:
                                      --------------------------
                                           Vice President

<PAGE>   5

                     MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1999-2 Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

       The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of March 10, 1999 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1999-2 Master Trust Certificates for the Distribution Date
occurring on May 17, 1999:

<TABLE>
<S>                                                              <C>
1.  Greenwood is Master Servicer under the Pooling
    and Servicing Agreement.

2.  The undersigned is a Servicing Officer of
    Greenwood as Master Servicer.

3.  The aggregate amount of Collections processed
    during the related Due Period is equal to                    $4,233,324,936.71

4.  The aggregate amount of Class A Principal
    Collections processed during the related Due
    Period is equal to                                              $72,862,750.48

5.  The aggregate amount of Class A Finance Charge
    Collections processed during the related Due
    Period is equal to                                               $7,621,223.22

6a. The aggregate amount of Class A Principal
    Collections recharacterized as Series Yield
    Collections during the related Due Period is
    equal to                                                                 $0.00

6b. The aggregate amount of Class A Additional
    Funds for this Distribution date is equal to                             $0.00

7.  The amount of drawings under the Credit
    Enhancement required to be made on the related
    Drawing Date pursuant to the Series
    Supplement:

    (a)  with respect to the Class A Required
         Amount Shortfall is equal to                                        $0.00

    (b)  with respect to the Class A Cumulative
         Investor Charged-Off Amount is equal to                             $0.00

    (c)  with respect to the Class A Investor
         Interest is equal to                                                $0.00

8.  The sum of all amounts payable to the Class A
    Certificateholders on the current Distribution
    Date is equal to                                                         $0.00
</TABLE>

<PAGE>   6

<TABLE>
<S>                                                                  <C>
9.   The aggregate amount of Class B Principal
     Collections processed during the related Due
     Period is equal to                                              $3,836,293.56

10.  The aggregate amount of Class B Finance Charge
     Collections processed during the related Due
     Period is equal to                                                $401,264.70

11a. The aggregate amount of Class B Principal
     Collections recharacterized as Series Yield
     Collections during the related Due Period is
     equal to                                                                $0.00

11b. The aggregate amount of Class B Additional
     Funds for this Distribution date is equal to                            $0.00

12.  The amount of drawings under the Credit
     Enhancement required to be made on the related
     Drawing Date pursuant to the Series
     Supplement:

     (a)  with respect to the Class B Required
          Amount Shortfall is equal to                                       $0.00

     (b)  with respect to the Class B Cumulative
          Investor Charged-Off Amount is equal to                            $0.00

     (c)  with respect to the Class B Investor
          Interest is equal to                                               $0.00

13.  The sum of all amounts payable to the Class B
     Certificateholders on the current Distribution
     Date is equal to                                                        $0.00

14.  Attached hereto is a true copy of the
     statement required to be delivered by the
     Master Servicer on the date of this
     Certificate to the Trustee pursuant to Section
     16 of the Series Supplement.
</TABLE>

       IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 17th day of May, 1999.

                                GREENWOOD TRUST COMPANY
                                     as Master Servicer

                                By:
                                   ------------------------------
                                Vice President, Chief Accounting Officer,
                                and Treasurer


<PAGE>   1
                                                                     EXHIBIT (Z)

                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1999-3 Monthly Statement
                      Class A Certificate CUSIP #25466KCG2
                      Class B Certificate CUSIP #25466KCH0

Trust Distribution Date: May 17, 1999         Due Period Ending:  April 30, 1999

Pursuant to the Series Supplement dated as of April 6, 1999 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<CAPTION>
1.     Payments for the benefit of Series Investors this Due Period (per $1000 of Class Initial Investor Interest)
       -----------------------------------------------------------------------------------------------------------

       Series  1999-3                                     Total              Interest           Principal
             <S>          <C>                          <C>                 <C>                 <C>
             Class A      41 days at 5.047190000%      $5.748188611        $5.748188611        $0.000000000

             Class B      41 days at 5.247190000%      $5.975966389        $5.975966389        $0.000000000
</TABLE>

<TABLE>
<CAPTION>
2.     Principal Receivables at the end of the Due Period
       --------------------------------------------------
   <S>                                                       <C>
   (a) Aggregate Investor Interest                           $20,624,749,676.00
       Seller Interest                                        $5,632,195,899.94

       Total Master Trust                                    $26,256,945,575.94

   (b) Group One Investor Interest                           $18,074,749,676.00

   (c) Group Two Investor Interest                            $2,550,000,000.00

   (d) Series 1999-3 Investor Interest                          $526,316,000.00

   (e) Class A Investor Interest                                $500,000,000.00

       Class B Investor Interest                                 $26,316,000.00
</TABLE>

<TABLE>
<CAPTION>
3.     Allocation of Receivables Collected During the Due Period
       ---------------------------------------------------------
                                                                       Finance Charge            Principal            Yield
                                                                        Collections             Collections         Collections
   <S>                                                              <C>                     <C>                      <C>
   (a) Allocation of Collections between Investor and Seller

       Aggregate Investor Allocation                                $   316,121,219.78      $ 3,022,278,825.29       $   0.00

       Seller:                                                      $    84,742,614.59      $   810,182,277.03       $   0.00

   (b) Group One Allocation                                         $   277,252,259.81      $ 2,650,671,899.42       $   0.00

   (c) Group Two Allocation                                         $    38,868,959.97      $   371,606,925.87       $   0.00

   (d) Series 1999-3 Allocations                                    $     8,022,487.92      $    76,699,044.04       $   0.00

   (e) Class A Allocations                                          $     7,621,223.22      $    72,862,750.48       $   0.00

       Class B Allocations                                          $       401,264.70      $     3,836,293.56       $   0.00
</TABLE>


<PAGE>   2


<TABLE>
<CAPTION>
4.     Information Concerning the Series Principal Funding Accounts ("SPFA")
       ---------------------------------------------------------------------
                        Deposits into the
                           SPFAs This        SPFA     Deposit Deficit    Investment
                           Due Period       Balance       Amount           Income
       <S>                   <C>             <C>           <C>             <C>
       Series 1999-3         $0.00           $0.00         0.00            $0.00
</TABLE>

<TABLE>
<CAPTION>
5.     Information Concerning Amount of Controlled Liquidation Payments
       ----------------------------------------------------------------
                                                                     Total Payments
                              Amount Paid       Deficit Amount        Through This
                            This Due Period     This Due Period        Due Period
       <S>                       <C>                 <C>                  <C>
       Series 1999-3             $0.00               $0.00                $0.00
</TABLE>

<TABLE>
<CAPTION>
6.     Information Concerning the Series Interest Funding Accounts ("SIFA")
       --------------------------------------------------------------------
                                           Deposits Into the
                                              SIFAs This
                                              Due Period          SIFA Balance
       <S>                                   <C>                      <C>
       Series 1999-3                         $3,031,357.84            $0.00
</TABLE>

<TABLE>
<CAPTION>
7.     Pool Factors
       ------------
                                                                 This Due Period
          <S>                                                     <C>
          Class A                                                 1.00000000

          Class B                                                 1.00000000
</TABLE>

<TABLE>
<CAPTION>
8.     Investor Charged-Off Amount
       ---------------------------                                     Cumulative
                                                                 Investor Charged-Off
                                              This Due Period            Amount
   <S>                                         <C>                       <C>
   (a) Group One                               $86,442,427.02            $0.00

   (b) Group Two                               $12,118,664.92            $0.00

   (c) Series 1999-3                            $2,501,272.05            $0.00

   (d) Class A                                  $2,376,164.70            $0.00

       Class B                                    $125,107.35            $0.00
</TABLE>

<TABLE>
<CAPTION>
9.     Investor Losses This Due Period
       -------------------------------                            Per $1,000 of
                                                                 Original Invested
                                                        Total        Principal
   <S>                                                  <C>            <C>
   (a) Group One                                        $0.00          $0.00

   (b) Group Two                                        $0.00          $0.00

   (c) Series 1999-3                                    $0.00          $0.00

   (d) Class A                                          $0.00          $0.00

       Class B                                          $0.00          $0.00
</TABLE>

<PAGE>   3


<TABLE>
<CAPTION>
10.    Reimbursement of Investor Losses This Due Period
       ------------------------------------------------            Per $1,000 of
                                                                 Original Invested
                                                        Total        Principal
   <S>                                                  <C>            <C>
   (a) Group One                                        $0.00          $0.00

   (b) Group Two                                        $0.00          $0.00

   (c) Series 1999-3                                    $0.00          $0.00

   (d) Class A                                          $0.00          $0.00

       Class B                                          $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
11.    Aggregate Amount of Unreimbursed Investor Losses
       ------------------------------------------------            Per $1,000 of
                                                                 Original Invested
                                                        Total        Principal
   <S>                                                  <C>            <C>
   (a) Group One                                        $0.00          $0.00

   (b) Group Two                                        $0.00          $0.00

   (c) Series 1999-3                                    $0.00          $0.00

   (d) Class A                                          $0.00          $0.00

       Class B                                          $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
12.    Investor Monthly Servicing Fee Payable at the end of the Due Period
       -------------------------------------------------------------------
   <S>                                                         <C>
   (a) Group One                                               $30,315,482.22

   (b) Group Two                                                $4,250,000.00

   (c) Series 1999-3                                              $877,193.33

   (d) Class A                                                    $833,333.33

       Class B                                                     $43,860.00
</TABLE>

<TABLE>
<CAPTION>
13.    Class Available Subordinated Amount at the end of the Due Period
       ----------------------------------------------------------------
                                                                   As a Percentage
                                                                     of Class A
                                                   Total           Invested Amount
       <S>                                     <C>                      <C>
       Series 1999-3 Class B                   $65,789,500.00           13.1579%
</TABLE>

<TABLE>
<CAPTION>
14.    Total Available Credit Enhancement Amounts
       ------------------------------------------

                                                Shared Amount     Class B Amount
       <S>                                           <C>          <C>
       Maximum Amount                                $0.00        $39,473,700.00

       Available Amount                              $0.00        $39,473,700.00

       Amount of Drawings on Credit Enhancement
         for this Due Period                         $0.00                 $0.00
</TABLE>

<PAGE>   4

<TABLE>
<CAPTION>
15.    Delinquency Summary
       -------------------

       End of Due Period Master Trust Receivables Outstanding         $26,675,706,815.58

                         Delinquent Amount      Percentage of Ending
       Payment Status      Ending Balance      Receivables Outstanding
       <S>                <C>                         <C>
       30-59 days           $628,092,799.56             2.35%

       60-179 days        $1,127,022,100.37             4.22%
</TABLE>


                                       U.S. BANK NATIONAL ASSOCIATION
                                       as Trustee

                                   BY:
                                       ---------------------------
                                             Vice President

<PAGE>   5

                     MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1999-3 Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

       The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of April 6, 1999 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1999-3 Master Trust Certificates for the Distribution Date
occurring on May 17, 1999:

<TABLE>
<S>                                                              <C>
1.  Greenwood is Master Servicer under the Pooling
    and Servicing Agreement.

2.  The undersigned is a Servicing Officer of
    Greenwood as Master Servicer.

3.  The aggregate amount of Collections processed
    during the related Due Period is equal to                    $4,233,324,936.71

4.  The aggregate amount of Class A Principal
    Collections processed during the related Due
    Period is equal to                                              $72,862,750.48

5.  The aggregate amount of Class A Finance Charge
    Collections processed during the related Due
    Period is equal to                                               $7,621,223.22

6a. The aggregate amount of Class A Principal
    Collections recharacterized as Series Yield
    Collections during the related Due Period is
    equal to                                                                 $0.00

6b. The aggregate amount of Class A Additional
    Funds for this Distribution date is equal to                             $0.00

7.  The amount of drawings under the Credit
    Enhancement required to be made on the related
    Drawing Date pursuant to the Series
    Supplement:

    (a)  with respect to the Class A Required
         Amount Shortfall is equal to                                        $0.00

    (b)  with respect to the Class A Cumulative
         Investor Charged-Off Amount is equal to                             $0.00

    (c)  with respect to the Class A Investor
         Interest is equal to                                                $0.00

8.  The sum of all amounts payable to the Class A
    Certificateholders on the current Distribution
    Date is equal to                                                 $2,874,094.31
</TABLE>

<PAGE>   6

<TABLE>
<S>                                                                <C>
9.   The aggregate amount of Class B Principal
     Collections processed during the related Due
     Period is equal to                                              $3,836,293.56

10.  The aggregate amount of Class B Finance Charge
     Collections processed during the related Due
     Period is equal to                                                $401,264.70

11a. The aggregate amount of Class B Principal
     Collections recharacterized as Series Yield
     Collections during the related Due Period is
     equal to                                                                $0.00

11b. The aggregate amount of Class B Additional
     Funds for this Distribution date is equal to                            $0.00

12.  The amount of drawings under the Credit
     Enhancement required to be made on the related
     Drawing Date pursuant to the Series
     Supplement:

     (a)  with respect to the Class B Required
          Amount Shortfall is equal to                                       $0.00

     (b)  with respect to the Class B Cumulative
          Investor Charged-Off Amount is equal to                            $0.00

     (c)  with respect to the Class B Investor
          Interest is equal to                                               $0.00

13.  The sum of all amounts payable to the Class B
     Certificateholders on the current Distribution
     Date is equal to                                                  $157,263.53

14.  Attached hereto is a true copy of the
     statement required to be delivered by the
     Master Servicer on the date of this
     Certificate to the Trustee pursuant to Section
     16 of the Series Supplement.
</TABLE>

       IN WITNESS WHEREOF, the undersigned has duly
executed and delivered certificate this 17th day of
May, 1999.

                                GREENWOOD TRUST COMPANY
                                     as Master Servicer

                                By:
                                   ------------------------------
                                Vice President, Chief Accounting Officer,
                                and Treasurer


<PAGE>   1
                                                                    EXHIBIT (AA)

                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1999-4 Monthly Statement
                      Class A Certificate CUSIP #25466KCJ6
                      Class B Certificate CUSIP #25466KCK3

Trust Distribution Date: May 17, 1999         Due Period Ending:  April 30, 1999

Pursuant to the Series Supplement dated as of April 27, 1999 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

<TABLE>
<CAPTION>
1.     Payments for the benefit of Series Investors this Due Period (per $1000 of Class Initial Investor Interest)
       -----------------------------------------------------------------------------------------------------------

       Series  1999-4                                      Total          Interest          Principal
            <S>          <C>                           <C>              <C>               <C>
            Class A      18 days at 5.650000000%       $2.825000000     $2.825000000      $0.000000000

            Class B      18 days at 5.850000000%       $2.925000000     $2.925000000      $0.000000000
</TABLE>

<TABLE>
<CAPTION>
2.     Principal Receivables at the end of the Due Period
       --------------------------------------------------
   <S>                                                       <C>
   (a) Aggregate Investor Interest                           $20,624,749,676.00
       Seller Interest                                        $5,632,195,899.94

       Total Master Trust                                    $26,256,945,575.94

   (b) Group One Investor Interest                           $18,074,749,676.00

   (c) Group Two Investor Interest                            $2,550,000,000.00

   (d) Series 1999-4 Investor Interest                          $894,737,000.00

   (e) Class A Investor Interest                                $850,000,000.00

       Class B Investor Interest                                 $44,737,000.00
</TABLE>

<TABLE>
<CAPTION>
3.     Allocation of Receivables Collected During the Due Period
       ---------------------------------------------------------
                                                                  Finance Charge                Principal             Yield
                                                                    Collections                Collections          Collections
   <S>                                                           <C>                          <C>                     <C>
   (a) Allocation of Collections between Investor and Seller

       Aggregate Investor Allocation                             $   316,121,219.78           $ 3,022,278,825.29      $   0.00

       Seller:                                                   $    84,742,614.59           $   810,182,277.03      $   0.00

   (b) Group One Allocation                                      $   277,252,259.81           $ 2,650,671,899.42      $   0.00

   (c) Group Two Allocation                                      $    38,868,959.97           $   371,606,925.87      $   0.00

   (d) Series 1999-4 Allocations                                 $    13,638,189.37           $   130,387,991.63      $   0.00

   (e) Class A Allocations                                       $    12,956,319.99           $   123,868,975.29      $   0.00

       Class B Allocations                                       $       681,869.38           $     6,519,016.34      $   0.00
</TABLE>

<PAGE>   2

<TABLE>
<CAPTION>
4.     Information Concerning the Series Principal Funding Accounts ("SPFA")
       ---------------------------------------------------------------------
                        Deposits into the
                            SPFAs This       SPFA    Deposit Deficit   Investment
                            Due Period      Balance       Amount        Income

       <S>                    <C>           <C>           <C>          <C>
       Series 1999-4           $0.00         $0.00         0.00         $0.00
</TABLE>

<TABLE>
<CAPTION>
5.     Information Concerning Amount of Controlled Liquidation Payments
       ----------------------------------------------------------------
                                                                   Total Payments
                                  Amount Paid     Deficit Amount    Through This
                                This Due Period  This Due Period     Due Period
       <S>                          <C>              <C>               <C>
       Series 1999-4                 $0.00            $0.00             $0.00
</TABLE>

<TABLE>
<CAPTION>
6.     Information Concerning the Series Interest Funding Accounts ("SIFA")
       --------------------------------------------------------------------
                                            Deposits Into the
                                               SIFAs This
                                               Due Period     SIFA Balance
       <S>                                  <C>              <C>
       Series 1999-4                         $2,532,105.73    $2,532,105.73
</TABLE>

<TABLE>
<CAPTION>
7.     Pool Factors
       ------------
                                                              This Due Period
       <S>                                                     <C>
       Class A                                                 1.00000000

       Class B                                                 1.00000000
</TABLE>

<TABLE>
<CAPTION>
8.     Investor Charged-Off Amount
       ---------------------------                                     Cumulative
                                                                  Investor Charged-Off
                                              This Due Period            Amount
   <S>                                         <C>                       <C>
   (a) Group One                               $86,442,427.02            $0.00

   (b) Group Two                               $12,118,664.92            $0.00

   (c) Series 1999-4                            $4,252,149.97            $0.00

   (d) Class A                                  $4,039,554.97            $0.00

       Class B                                    $212,595.00            $0.00
</TABLE>

<TABLE>
<CAPTION>
9.     Investor Losses This Due Period
       -------------------------------                            Per $1,000 of
                                                                Original Invested
                                                        Total        Principal
   <S>                                                  <C>            <C>
   (a) Group One                                        $0.00          $0.00

   (b) Group Two                                        $0.00          $0.00

   (c) Series 1999-4                                    $0.00          $0.00

   (d) Class A                                          $0.00          $0.00

       Class B                                          $0.00          $0.00
</TABLE>

<PAGE>   3

<TABLE>
<CAPTION>
10.    Reimbursement of Investor Losses This Due Period
       ------------------------------------------------            Per $1,000 of
                                                                 Original Invested
                                                        Total        Principal
   <S>                                                  <C>            <C>
   (a) Group One                                        $0.00          $0.00

   (b) Group Two                                        $0.00          $0.00

   (c) Series 1999-4                                    $0.00          $0.00

   (d) Class A                                          $0.00          $0.00

       Class B                                          $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
11.    Aggregate Amount of Unreimbursed Investor Losses
       ------------------------------------------------           Per $1,000 of
                                                                 Original Invested
                                                        Total        Principal
   <S>                                                  <C>            <C>
   (a) Group One                                        $0.00          $0.00

   (b) Group Two                                        $0.00          $0.00

   (c) Series 1999-4                                    $0.00          $0.00

   (d) Class A                                          $0.00          $0.00

       Class B                                          $0.00          $0.00
</TABLE>

<TABLE>
<CAPTION>
12.    Investor Monthly Servicing Fee Payable at the end of the Due Period
       -------------------------------------------------------------------
   <S>                                                         <C>
   (a) Group One                                               $30,315,482.22

   (b) Group Two                                                $4,250,000.00

   (c) Series 1999-4                                            $1,491,228.34

   (d) Class A                                                  $1,416,666.67

       Class B                                                     $74,561.67
</TABLE>

<TABLE>
<CAPTION>
13.    Class Available Subordinated Amount at the end of the Due Period
       ----------------------------------------------------------------
                                                                As a  Percentage
                                                                   of Class A
                                                   Total        Invested Amount
       <S>                                     <C>                  <C>
       Series 1999-4 Class B                   $76,052,645.00       8.9474%
</TABLE>

<TABLE>
<CAPTION>
14.    Total Available Credit Enhancement Amounts
       ------------------------------------------

                                                   Shared Amount   Class B Amount
       <S>                                              <C>       <C>
       Maximum Amount                                   $0.00     $35,789,480.00

       Available Amount                                 $0.00     $35,789,480.00

       Amount of Drawings on Credit Enhancement
         for this Due Period                            $0.00              $0.00
</TABLE>

<PAGE>   4

<TABLE>
<CAPTION>
15.    Delinquency Summary
       -------------------

       End of Due Period Master Trust Receivables Outstanding         $26,675,706,815.58

                            Delinquent Amount    Percentage of Ending
       Payment Status        Ending Balance     Receivables Outstanding

       <S>                 <C>                        <C>
       30-59 days            $628,092,799.56            2.35%

       60-179 days         $1,127,022,100.37            4.22%
</TABLE>


                                       U.S. BANK NATIONAL ASSOCIATION
                                       as Trustee

                                   BY:
                                       ---------------------------
                                             Vice President

<PAGE>   5

                     MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1999-4 Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

       The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of April 27, 1999 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1999-4 Master Trust Certificates for the Distribution Date
occurring on May 17, 1999:

<TABLE>
<S>                                                              <C>
1.  Greenwood is Master Servicer under the Pooling
    and Servicing Agreement.

2.  The undersigned is a Servicing Officer of
    Greenwood as Master Servicer.

3.  The aggregate amount of Collections processed
    during the related Due Period is equal to                    $4,233,324,936.71

4.  The aggregate amount of Class A Principal
    Collections processed during the related Due
    Period is equal to                                             $123,868,975.29

5.  The aggregate amount of Class A Finance Charge
    Collections processed during the related Due
    Period is equal to                                              $12,956,319.99

6a. The aggregate amount of Class A Principal
    Collections recharacterized as Series Yield
    Collections during the related Due Period is
    equal to                                                                 $0.00

6b. The aggregate amount of Class A Additional
    Funds for this Distribution date is equal to                             $0.00

7.  The amount of drawings under the Credit
    Enhancement required to be made on the related
    Drawing Date pursuant to the Series
    Supplement:

    (a)  with respect to the Class A Required
         Amount Shortfall is equal to                                        $0.00

    (b)  with respect to the Class A Cumulative
         Investor Charged-Off Amount is
         equal to                                                            $0.00

    (c)  with respect to the Class A Investor
         Interest is equal to                                                $0.00

8.  The sum of all amounts payable to the Class A
    Certificateholders on the current Distribution
    Date is equal to                                                         $0.00
</TABLE>

<PAGE>   6

<TABLE>
<S>                                                                 <C>
9.   The aggregate amount of Class B Principal
     Collections processed during the related Due
     Period is equal to                                              $6,519,016.34

10.  The aggregate amount of Class B Finance Charge
     Collections processed during the related Due
     Period is equal to                                                $681,869.38

11a. The aggregate amount of Class B Principal
     Collections recharacterized as Series Yield
     Collections during the related Due Period is
     equal to                                                                $0.00

11b. The aggregate amount of Class B Additional
     Funds for this Distribution date is equal to                            $0.00

12.  The amount of drawings under the Credit
     Enhancement required to be made on the related
     Drawing Date pursuant to the Series
     Supplement:

     (a)  with respect to the Class B Required
          Amount Shortfall is equal to                                       $0.00

     (b)  with respect to the Class B Cumulative
          Investor Charged-Off Amount is
          equal to                                                           $0.00

     (c)  with respect to the Class B Investor
          Interest is equal to                                               $0.00

13.  The sum of all amounts payable to the Class B
     Certificateholders on the current Distribution
     Date is equal to                                                        $0.00

14.  Attached hereto is a true copy of the
     statement required to be delivered by the
     Master Servicer on the date of this
     Certificate to the Trustee pursuant to Section
     16 of the Series Supplement.
</TABLE>

       IN WITNESS WHEREOF, the undersigned has duly
executed and delivered certificate this 17th day of
May, 1999.

                                GREENWOOD TRUST COMPANY
                                     as Master Servicer

                                By:
                                   -------------------------------
                                Vice President, Chief Accounting Officer,
                                and Treasurer



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