DISCOVER CARD MASTER TRUST I
8-K, 1998-10-15
ASSET-BACKED SECURITIES
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<PAGE>   1
                                                                  CONFORMED COPY

                       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): October 15, 1998



                          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 141
                         Index to Exhibits is on page 8





<PAGE>   2



Item 5.  Other Events

A)   Series 1993-1:
On October 15, 1998 the Registrant made available the Monthly
Certificateholders' Statement for the September 1998 Due Period with respect to
Series 1993-1, which is attached as Exhibit 20(a) hereto.

B)   Series 1993-2:
On October 15, 1998 the Registrant made available the Monthly
Certificateholders' Statement for the September 1998 Due Period with respect to
Series 1993-2, which is attached as Exhibit 20(b) hereto.

C)   Series 1993-3:
On October 15, 1998 the Registrant made available the Monthly
Certificateholders' Statement for the September 1998 Due Period with respect to
Series 1993-3, which is attached as Exhibit 20(c) hereto.

D)   Series 1994-2:
On October 15, 1998 the Registrant made available the Monthly
Certificateholders' Statement for the September 1998 Due Period with respect to
Series 1994-2, which is attached as Exhibit 20(d) hereto.

E)   Series 1994-3:
On October 15, 1998 the Registrant made available the Monthly
Certificateholders' Statement for the September 1998 Due Period with respect to
Series 1994-3, which is attached as Exhibit 20(e) hereto.

F)   Series 1994-A:
On October 15, 1998 the Registrant made available the Monthly
Certificateholders' Statement for the September 1998 Due Period with respect to
Series 1994-A, which is attached as Exhibit 20(f) hereto.

G)   Series 1995-1:
On October 15, 1998 the Registrant made available the Monthly
Certificateholders' Statement for the  September 1998 Due Period with respect
to Series 1995-1, which is attached as Exhibit 20(g) hereto.

H)   Series 1995-2:
On October 15, 1998 the Registrant made available the Monthly
Certificateholders Statement for the September 1998 Due Period with respect to
Series 1995-2, which is attached as Exhibit 20(h) hereto.

I)   Series 1995-3:
On October 15, 1998 the Registrant made available the Monthly
Certificateholders Statement for the September 1998 Due Period with respect to
Series 1995-3, which is attached as Exhibit 20(i) hereto.





                                       2
<PAGE>   3


J)   Series 1996-1:
On October 15, 1998 the Registrant made available the Monthly
Certificateholders Statement for the September 1998 Due Period with respect to
Series 1996-1, which is attached as Exhibit 20(j) hereto.

K)   Series 1996-2:
On October 15, 1998 the Registrant made available the Monthly
Certificateholders Statement for the September 1998 Due Period with respect to
Series 1996-2, which is attached as Exhibit 20(k) hereto.

L)   Series 1996-3:
On October 15, 1998 the Registrant made available the Monthly
Certificateholders Statement for the September 1998 Due Period with respect to
Series 1996-3, which is attached as Exhibit 20(l) hereto.

M)   Series 1996-4:
On October 15, 1998 the Registrant made available the Monthly
Certificateholders Statement for the September 1998 Due Period with respect to
Series 1996-4, which is attached as Exhibit 20(m) hereto.

N)   Series 1997-1:
On October 15, 1998 the Registrant made available the Monthly
Certificateholders Statement for the September 1998 Due Period with respect to
Series 1997-1, which is attached as Exhibit 20(n) hereto.

O)   Series 1997-2:
On October 15, 1998 the Registrant made available the Monthly
Certificateholders Statement for the September 1998 Due Period with respect to
Series 1997-2, which is attached as Exhibit 20(o) hereto.

P)   Series 1997-3:
On October 15, 1998 the Registrant made available the Monthly
Certificateholders Statement for the September 1998 Due Period with respect to
Series 1997-3, which is attached as Exhibit 20(p) hereto.

Q)   Series 1997-4:
On October 15, 1998 the Registrant made available the Monthly
Certificateholders Statement for the September 1998 Due Period with respect to
Series 1997-4, which is attached as Exhibit 20(q) hereto.

R)   Series 1998-1:
On October 15, 1998 the Registrant made available the Monthly
Certificateholders Statement for the September 1998 Due Period with respect to
Series 1998-1, which is attached as Exhibit 20(r) hereto.





                                       3
<PAGE>   4


S)   Series 1998-2:
On October 15, 1998 the Registrant made available the Monthly
Certificateholders Statement for the September 1998 Due Period with respect to
Series 1998-2, which is attached as Exhibit 20(s) hereto.

T)   Series 1998-3:
On October 15, 1998 the Registrant made available the Monthly
Certificateholders Statement for the September 1998 Due Period with respect to
Series 1998-3, which is attached as Exhibit 20(t) hereto.

U)   Series 1998-4:
On October 15, 1998 the Registrant made available the Monthly
Certificateholders Statement for the September 1998 Due Period with respect to
Series 1998-4, which is attached as Exhibit 20(u) hereto.

V)   Series 1998-6:
On October 15, 1998 the Registrant made available the Monthly
Certificateholders Statement for the September 1998 Due Period with respect to
Series 1998-6, which is attached as Exhibit 20(v) 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 
                 September 30, 1998, for Series 1993-1.

20(b)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1993-2.

20(c)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1993-3.

20(d)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1994-2.

20(e)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1994-3.

20(f)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1994-A.

20(g)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1995-1.

20(h)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1995-2.

20(i)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1995-3.

20(j)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1996-1.

20(k)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1996-2.

20(l)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1996-3.

20(m)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1996-4.
                                                                   
20(n)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1997-1.
</TABLE>





                                       5
<PAGE>   6


<TABLE>
<S>              <C>
20(o)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1997-2.

20(p)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1997-3.

20(q)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1997-4.
                                                                   
20(r)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1998-1.

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

20(t)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1998-3.
                                                                   
20(u)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1998-4.

20(v)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1998-6.
</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: October 15, 1998





                                       7
<PAGE>   8



                                 EXHIBIT INDEX

<TABLE>
<CAPTION>
Exhibit No.      Description
- -----------      -----------
<S>              <C>
20(a)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1993-1.

20(b)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1993-2.

20(c)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1993-3.

20(d)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1994-2.

20(e)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1994-3.

20(f)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1994-A.

20(g)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1995-1.

20(h)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1995-2.

20(i)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1995-3.

20(j)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1996-1.

20(k)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1996-2.

20(l)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1996-3.

20(m)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1996-4.

20(n)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1997-1.

20(o)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1997-2.
</TABLE>





                                       8
<PAGE>   9


<TABLE>
<S>              <C>
20(p)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1997-3.

20(q)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1997-4.

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

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

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

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

20(v)            Monthly Certificateholders' Statement, related to the Due Period ending 
                 September 30, 1998, for Series 1998-6.
</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: October 15, 1998  Due Period Ending: September 30, 1998

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 A      30 days at 5.859840000%                   $86.181866667   $2.848533333   $83.333333333

         Class B      30 days at 5.300000000%                    $4.416666667   $4.416666667    $0.000000000
</TABLE>

<TABLE>
<CAPTION>
2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------
  <S>                                                    <C>
  (a) Aggregate Investor Interest                        $17,987,972,342.65

      Seller Interest                                     $5,650,197,368.71

      Total Master Trust                                 $23,638,169,711.36


  (b) Group One Investor Interest                        $15,437,972,342.65

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

  (d) Series 1993-1 Investor Interest                       $422,873,000.00

  (e) Class A Investor Interest                             $375,000,000.00

      Class B Investor Interest                              $47,873,000.00
</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.                           $311,805,039.20  $2,508,296,244.18            $0.00

      Seller:                                                   $96,316,739.86    $774,814,023.07            $0.00

  (b) Group One Allocation                                     $267,891,135.76  $2,155,033,579.41            $0.00

  (c) Group Two Allocation                                      $43,913,903.44    $353,262,664.77            $0.00

  (d) Series 1993-1 Allocations                                  $8,325,684.29     $66,975,449.45            $0.00

  (e) Class A Allocations                                        $7,509,440.73     $60,409,228.92            $0.00

      Class B Allocations                                          $816,243.56      $6,566,220.53            $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     $62,500,000.00      $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        $62,500,000.00              $0.00    $375,000,000.00
</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 1993-1                            $2,347,839.08            $0.00
</TABLE>

<TABLE>
<CAPTION>
7.   Pool Factors
     ------------
                                                            This Due Period
     <S>                                                     <C>
     Class A                                                 0.50000000

     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                           $113,570,252.31            $0.00

  (b) Group Two                            $18,616,939.60            $0.00

  (c) Series 1993-1                         $3,529,605.65            $0.00

  (d) Class A                               $3,183,565.88            $0.00

      Class B                                 $346,039.77            $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 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                                            $25,945,231.67

  (b) Group Two                                             $4,250,000.00

  (c) Series 1993-1                                           $808,955.00

  (d) Class A                                                 $729,166.67

      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                      $63,829,840.00      17.0213%
</TABLE>

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

                                             Shared Amount  Class B Amount
     <S>                                     <C>              <C>
     Maximum Amount                          $10,571,825.00   $15,957,460.00

     Available Amount                        $10,571,825.00   $15,957,460.00

     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     $24,021,453,838.82

                         Delinquent Amount  Percentage of Ending
     Payment Status      Ending Balance     Receivables Outstanding
     <S>                 <C>                        <C>
     30-59 days            $651,395,072.25          2.71%

     60-179 days         $1,134,774,887.95          4.72%
</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 October 15, 1998:

<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                                                          $3,691,232,046.31

  4.  The aggregate amount of Class A Principal Collections processed during
      the related Due Period is equal to                                             $60,409,228.92

  5.  The aggregate amount of Class A Finance Charge Collections processed
      during the related Due Period is equal to                                       $7,509,440.73

  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                                   $64,636,400.00
</TABLE>

<PAGE>   6





<TABLE>
<S>                                                                                   <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                               $6,566,220.53

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                          $816,243.56

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                                       $211,439.08

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  15th day of October, 1998.



                           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: October 15, 1998  Due Period Ending: September 30, 1998

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>
         Class A      30 days at 5.400000000%                   $86.333333337   $3.000000000   $83.333333338

         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                        $17,987,972,342.65

      Seller Interest                                     $5,650,197,368.71

      Total Master Trust                                 $23,638,169,711.36


  (b) Group One Investor Interest                        $15,437,972,342.65

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

  (d) Series 1993-2 Investor Interest                       $500,000,666.65

  (e) Class A Investor Interest                             $466,666,666.65

      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                            $311,805,039.20    $2,508,296,244.18            $0.00

      Seller                                                    $96,316,739.86      $774,814,023.07            $0.00

  (b) Group One Allocation                                     $267,891,135.76    $2,155,033,579.41            $0.00

  (c) Group Two Allocation                                      $43,913,903.44      $353,262,664.77            $0.00

  (d) Series 1993-2 Allocations                                  $9,754,110.51       $78,466,335.38            $0.00

  (e) Class A Allocations                                        $9,182,740.02       $73,869,981.01            $0.00

      Class B Allocations                                          $571,370.49        $4,596,354.37            $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    $66,666,666.67       $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            $66,666,666.67               $0.00   $333,333,333.35
</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                            $2,559,725.42              $0.00
</TABLE>

<TABLE>
<CAPTION>
7.   Pool Factors
     ------------
                                                                This Due Period
     <S>                                                             <C>
     Class A                                                         0.58333333

     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                           $113,570,252.31            $0.00

  (b) Group Two                            $18,616,939.60            $0.00

  (c) Series 1993-2                         $4,135,175.25            $0.00

  (d) Class A                               $3,892,947.41            $0.00

      Class B                                 $242,227.84            $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 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>
  (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>
  (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>
  (a) Group One                                            $25,945,231.67

  (b) Group Two                                             $4,250,000.00

  (c) Series 1993-2                                           $944,445.56

  (d) Class A                                                 $888,888.89

      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                   $50,000,040.00    10.7143%
</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     $24,021,453,838.82

                         Delinquent Amount  Percentage of Ending
     Payment Status      Ending Balance     Receivables Outstanding
     <S>                 <C>                        <C>
     30-59 days            $651,395,072.25          2.71%

     60-179 days         $1,134,774,887.95          4.72%
</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 October 15, 1998:

<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                                                         $3,691,232,046.31

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                            $73,869,981.01

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                      $9,182,740.02

 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                                  $69,066,666.67
</TABLE>

<PAGE>   6


<TABLE>
<S>                                                                                 <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                             $4,596,354.37

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                        $571,370.49

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  15th day of October, 1998.



                           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: October 15, 1998  Due Period Ending: September 30, 1998

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>
         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>
  (a) Aggregate Investor Interest                        $17,987,972,342.65

      Seller Interest                                     $5,650,197,368.71

      Total Master Trust                                 $23,638,169,711.36


  (b) Group One Investor Interest                        $15,437,972,342.65

  (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                            $311,805,039.20     $2,508,296,244.18            $0.00

      Seller                                                    $96,316,739.86       $774,814,023.07            $0.00

  (b) Group One Allocation                                     $267,891,135.76     $2,155,033,579.41            $0.00

  (c) Group Two Allocation                                      $43,913,903.44       $353,262,664.77            $0.00

  (d) Series 1993-3 Allocations                                  $6,325,887.57        $50,888,209.15            $0.00

  (e) Class A Allocations                                        $6,040,202.33        $48,590,031.96            $0.00

      Class B Allocations                                          $285,685.24         $2,298,177.19            $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      $9,484,916.05
</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                           $113,570,252.31            $0.00

  (b) Group Two                            $18,616,939.60            $0.00

  (c) Series 1993-3                         $2,681,808.21            $0.00

  (d) Class A                               $2,560,694.29            $0.00

      Class B                                 $121,113.92            $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 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>
  (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>
  (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>
  (a) Group One                                            $25,945,231.67

  (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     $24,021,453,838.82

                         Delinquent Amount    Percentage of Ending
     Payment Status      Ending Balance       Receivables Outstanding
     <S>                 <C>                          <C>
     30-59 days            $651,395,072.25            2.71%

     60-179 days         $1,134,774,887.95            4.72%
</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 October 15, 1998:

<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                                                                 $3,691,232,046.31

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                    $48,590,031.96

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                              $6,040,202.33

 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                                                     $2,298,177.19

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                                $285,685.24

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  15th day of October, 1998.



                           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: October 15, 1998  Due Period Ending: September 30, 1998

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        30 days at 5.939840000%           $4.949866667    $4.949866667     $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>
  (a) Aggregate Investor Interest                        $17,987,972,342.65

      Seller Interest                                     $5,650,197,368.71

      Total Master Trust                                 $23,638,169,711.36


  (b) Group One Investor Interest                        $15,437,972,342.65

  (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                                $311,805,039.20    $2,508,296,244.18            $0.00

      Seller                                                        $96,316,739.86      $774,814,023.07            $0.00

  (b) Group One Allocation                                         $267,891,135.76    $2,155,033,579.41            $0.00

  (c) Group Two Allocation                                          $43,913,903.44      $353,262,664.77            $0.00

  (d) Series 1994-2 Allocations                                     $15,386,191.07      $123,773,257.08            $0.00

  (e) Class A Allocations                                           $14,610,759.69      $117,535,347.57            $0.00

      Class B Allocations                                              $775,431.38        $6,237,909.51            $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                         $4,507,497.38               $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                           $113,570,252.31            $0.00

  (b) Group Two                            $18,616,939.60            $0.00

  (c) Series 1994-2                         $6,522,849.65            $0.00

  (d) Class A                               $6,194,111.87            $0.00

      Class B                                 $328,737.78            $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>
  (a) Group One                                            $25,945,231.67

  (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     $24,021,453,838.82

                         Delinquent Amount    Percentage of Ending
     Payment Status      Ending Balance       Receivables Outstanding
     <S>                 <C>                        <C>
     30-59 days            $651,395,072.25          2.71%

     60-179 days         $1,134,774,887.95          4.72%
</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 October 15, 1998:


<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                                                              $3,691,232,046.31

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                $117,535,347.57

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                          $14,610,759.69

 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                                        $4,207,386.67
</TABLE>
<PAGE>   6

<TABLE>
<S>                                                                                      <C>              
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                                  $6,237,909.51

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                             $775,431.38

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  15th day of October, 1998.



                                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: October 15, 1998  Due Period Ending: September 30, 1998

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:

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

<TABLE>
<CAPTION>
     Series  1994-3                            Total             Interest       Principal
<S>                   <C>                      <C>               <C>            <C>         
         Class A      30 days at 5.779840000%  $4.816533333      $4.816533333   $0.000000000

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

2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------

<TABLE>
<S>                                                     <C>               
 (a) Aggregate Investor Interest                        $17,987,972,342.65
     Seller Interest                                     $5,650,197,368.71

     Total Master Trust                                 $23,638,169,711.36


 (b) Group One Investor Interest                        $15,437,972,342.65

 (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>

3.   Allocation of Receivables Collected During the Due Period
     ---------------------------------------------------------

<TABLE>
<CAPTION>
                                                            Finance Charge     Principal            Yield
                                                             Collections      Collections        Collections

<S>                                                         <C>              <C>                          <C>
 (a) Allocation of Collections between Investor and Seller
                   
     Aggregate Investor Allocation                          $311,805,039.20  $2,508,296,244.18            $0.00

     Seller:                                                 $96,316,739.86    $774,814,023.07            $0.00

 (b) Group One Allocation                                   $267,891,135.76  $2,155,033,579.41            $0.00

 (c) Group Two Allocation                                    $43,913,903.44    $353,262,664.77            $0.00

 (d) Series 1994-3 Allocations                               $13,590,455.24    $109,327,571.90            $0.00

 (e) Class A Allocations                                     $12,896,648.22    $103,746,284.45            $0.00

     Class B Allocations                                        $693,807.02      $5,581,287.45            $0.00
</TABLE>
<PAGE>   2
 
4.   Information Concerning the Series Principal Funding Accounts ("SPFA")
     ---------------------------------------------------------------------
<TABLE>
<CAPTION>
                         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>

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

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

<S>                                        <C>                      <C>  
     Series 1994-3                         $3,867,336.25            $0.00
</TABLE>

7.   Pool Factors
     ------------
<TABLE>
<CAPTION>
                                                            This Due Period

<S>                                                          <C>       
     Class A                                                 1.00000000

     Class B                                                 1.00000000
</TABLE>

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

<S>                                      <C>                        <C>  
 (a) Group One                           $113,570,252.31            $0.00

 (b) Group Two                            $18,616,939.60            $0.00

 (c) Series 1994-3                         $5,761,562.16            $0.00

 (d) Class A                               $5,467,428.36            $0.00

     Class B                                 $294,133.80            $0.00
</TABLE>

9.   Investor Losses This Due Period
     -------------------------------
<TABLE>
<CAPTION>
                                                             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>
<PAGE>   3

10.  Reimbursement of Investor Losses This Due Period
     ------------------------------------------------
<TABLE>
<CAPTION>
                                                              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>

11.  Aggregate Amount of Unreimbursed Investor Losses        
     ------------------------------------------------        
<TABLE>
<CAPTION>
                                                              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>

12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
     -------------------------------------------------------------------

<TABLE>
<S>                                                       <C>           
 (a) Group One                                            $25,945,231.67

 (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>

13.  Class Available Subordinated Amount at the end of the Due Period
     ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                             As a Percentage
                                                               of Class A
                                                 Total       Invested Amount

<S>                                          <C>               <C>     
     Series 1994-3 Class B                   $83,131,612.20    11.0842%
</TABLE>

14.  Total Available Credit Enhancement Amounts
     ------------------------------------------

<TABLE>
<CAPTION>
                                             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

15.  Delinquency Summary
     -------------------

     End of Due Period Master Trust Receivables Outstanding   $24,021,453,838.82

<TABLE>
<CAPTION>
                         Delinquent Amount  Percentage of Ending
     Payment Status      Ending Balance     Receivables Outstanding

     <S>                 <C>                        <C>  
     30-59 days            $651,395,072.25          2.71%

     60-179 days         $1,134,774,887.95          4.72%
</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 October 15, 1998:

<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                                                              $3,691,232,046.31

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                $103,746,284.45

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                          $12,896,648.22

 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                                        $3,612,400.00
</TABLE>
<PAGE>   6

<TABLE>
<S>                                                                                      <C>          
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                                  $5,581,287.45

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                             $693,807.02

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  15th day of October, 1998.



                           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: October 15, 1998 Due Period Ending:  September 30, 1998

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:

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

<TABLE>
<CAPTION>
     Series  1994-A                                  Total       Interest        Principal
     <S>              <C>                      <C>             <C>            <C>         
         Class A      30 days at 5.787970510%  $4.823308758    $4.823308758   $0.000000000
</TABLE>

2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------

<TABLE>
<S>                                                     <C>               
 (a) Aggregate Investor Interest                        $17,987,972,342.65
     Seller Interest                                     $5,650,197,368.71

     Total Master Trust                                 $23,638,169,711.36


 (b) Group One Investor Interest                        $15,437,972,342.65

 (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>

3.   Allocation of Receivables Collected During the Due Period
     ---------------------------------------------------------

<TABLE>
<CAPTION>
                                                            Finance Charge     Principal              Yield
                                                             Collections      Collections           Collections

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

     Aggregate Investor Allocation.                         $311,805,039.20  $2,508,296,244.18            $0.00

     Seller:                                                 $96,316,739.86    $774,814,023.07            $0.00

 (b) Group One Allocation                                   $267,891,135.76  $2,155,033,579.41            $0.00

 (c) Group Two Allocation                                    $43,913,903.44    $353,262,664.77            $0.00

 (d) Series 1994-A Allocations                               $43,913,903.44    $353,262,664.77            $0.00

 (e) Class A Allocations                                     $43,913,903.44    $353,262,664.77            $0.00

     Class B Allocations                                              $0.00              $0.00            $0.00
</TABLE>
<PAGE>   2

4.   Information Concerning the Series Principal Funding Accounts ("SPFA")
     ---------------------------------------------------------------------
<TABLE>
<CAPTION>
                       Deposits into the SPFAs
                             This                Total    Deposit Deficit Investment
                          Due Period            Deposits      Amount        Income

<S>                          <C>                 <C>           <C>          <C>
     Series 1994-A           $0.00               $0.00         0.00         $0.00
</TABLE>

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

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

<S>                                       <C>                       <C>  
     Series 1994-A                        $12,299,437.33            $0.00
</TABLE>

7.   Pool Factors
     ------------
<TABLE>
<CAPTION>
                                                            This Due Period

<S>                                                          <C>       
     Class A                                                 1.00000000

     Class B                                                 0.00000000
</TABLE>

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

<S>                                      <C>                        <C>  
 (a) Group One                           $113,570,252.31            $0.00

 (b) Group Two                            $18,616,939.60            $0.00

 (c) Series 1994-A                        $18,616,939.60            $0.00

 (d) Class A                              $18,616,939.60            $0.00

     Class B                                       $0.00            $0.00
</TABLE>

9.   Investor Losses This Due Period
     -------------------------------
<TABLE>
<CAPTION>
                                                             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-A                                 $0.00          $0.00

 (d) Class A                                       $0.00          $0.00

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

10.  Reimbursement of Investor Losses This Due Period        
     ------------------------------------------------        
<TABLE>
<CAPTION>
                                                             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-A                                 $0.00          $0.00

 (d) Class A                                       $0.00          $0.00

     Class B                                       $0.00          $0.00
</TABLE>

11.  Aggregate Amount of Unreimbursed Investor Losses        
     ------------------------------------------------        
<TABLE>
<CAPTION>
                                                             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-A                                 $0.00          $0.00

 (d) Class A                                       $0.00          $0.00

     Class B                                       $0.00          $0.00
</TABLE>

12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
     -------------------------------------------------------------------

<TABLE>
<S>                                                       <C>           
 (a) Group One                                            $25,945,231.67

 (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>

13.  Class Available Subordinated Amount at the end of the Due Period
     ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                              As a Percentage
                                                                of Class A
                                                  Total       Invested Amount

<S>                                                   <C>       <C>    
     Series 1994-A Class B                            $0.00     0.0000%
</TABLE>

14.  Total Available Credit Enhancement Amounts
     ------------------------------------------

<TABLE>
<CAPTION>
                                               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

15.  Delinquency Summary
     -------------------

     End of Due Period Master Trust Receivables Outstanding   $24,021,453,838.82

<TABLE>
<CAPTION>
                         Delinquent Amount    Percentage of Ending
     Payment Status      Ending Balance       Receivables Outstanding

     <S>                   <C>                        <C>
     30-59 days              $651,395,072.25          2.71%

     60-179 days           $1,134,774,887.95          4.72%
</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 October 15, 1998:


<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                                                              $3,691,232,046.31

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                $353,262,664.77

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                          $43,913,903.44

 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 sum of all amounts payable to the Class A Certificateholders
     on the current Distribution Date is equal to                                       $12,299,437.33

 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

 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  15th day of October, 1998.



                           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: October 15, 1998  Due Period Ending: September 30, 1998

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:

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

<TABLE>
<CAPTION>
     Series  1995-1                                  Total     Interest     Principal
<S>                   <C>                      <C>          <C>           <C>         
         Class A      30 days at 5.869840000%  $4.891533333 $4.891533333  $0.000000000

         Class B      30 days at 6.039840000%  $5.033200000 $5.033200000  $0.000000000
</TABLE>

2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------

<TABLE>
<S>                                                     <C>               
 (a) Aggregate Investor Interest                        $17,987,972,342.65
     Seller Interest                                     $5,650,197,368.71

     Total Master Trust                                 $23,638,169,711.36


 (b) Group One Investor Interest                        $15,437,972,342.65

 (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>

3.   Allocation of Receivables Collected During the Due Period
     ---------------------------------------------------------

<TABLE>
<CAPTION>
                                                            Finance Charge     Principal            Yield
                                                            Collections       Collections        Collections

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


     Aggregate Investor Allocation.                         $311,805,039.20  $2,508,296,244.18            $0.00

     Seller:                                                 $96,316,739.86    $774,814,023.07            $0.00

 (b) Group One Allocation                                   $267,891,135.76  $2,155,033,579.41            $0.00

 (c) Group Two Allocation                                    $43,913,903.44    $353,262,664.77            $0.00

 (d) Series 1995-1 Allocations                               $10,856,039.33     $87,330,733.11            $0.00

 (e) Class A Allocations                                     $10,325,481.01     $83,062,689.76            $0.00

     Class B Allocations                                        $530,558.32      $4,268,043.35            $0.00
</TABLE>
<PAGE>   2
 
4.   Information Concerning the Series Principal Funding Accounts ("SPFA")
     ---------------------------------------------------------------------
<TABLE>
<CAPTION>
                      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>

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

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

<S>                                        <C>                      <C>  
     Series 1995-1                         $3,093,863.42            $0.00
</TABLE>

7.   Pool Factors
     ------------
<TABLE>
<CAPTION>
                                                            This Due Period

<S>                                                          <C>       
     Class A                                                 1.00000000

     Class B                                                 1.00000000
</TABLE>

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

<S>                                      <C>                        <C>  
 (a) Group One                           $113,570,252.31            $0.00

 (b) Group Two                            $18,616,939.60            $0.00

 (c) Series 1995-1                         $4,602,328.93            $0.00

 (d) Class A                               $4,377,403.08            $0.00

     Class B                                 $224,925.85            $0.00
</TABLE>

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

10.  Reimbursement of Investor Losses This Due Period        
     ------------------------------------------------        
<TABLE>
<CAPTION>
                                                             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>

11.  Aggregate Amount of Unreimbursed Investor Losses        
     ------------------------------------------------        
<TABLE>
<CAPTION>
                                                             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>

12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
     -------------------------------------------------------------------

<TABLE>
<S>                                                       <C>           
 (a) Group One                                            $25,945,231.67

 (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>

13.  Class Available Subordinated Amount at the end of the Due Period
     ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                             As a Percentage
                                                               of Class A
                                                 Total       Invested Amount

<S>                                          <C>               <C>     
     Series 1995-1 Class B                   $69,473,690.00    11.5789%
</TABLE>

14.  Total Available Credit Enhancement Amounts
     ------------------------------------------

<TABLE>
<CAPTION>
                                           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

15.  Delinquency Summary
     -------------------

     End of Due Period Master Trust Receivables Outstanding   $24,021,453,838.82

<TABLE>
<CAPTION>
                         Delinquent Amount  Percentage of Ending
     Payment Status      Ending Balance     Receivables Outstanding

     <S>              <C>                        <C>  
     30-59 days         $651,395,072.25          2.71%

     60-179 days      $1,134,774,887.95          4.72%
</TABLE>


                                 U.S. BANK NATIONAL ASSOCIATION
                                 as Trustee


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

                                        Vice President
<PAGE>   5

               MASTER SERVICER'S CERTIFICATE STATEMENT

                     Discover Card Master Trust I

                   Series 1995-1 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 October 15, 1998:

<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                                                               $3,691,232,046.31

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                  $83,062,689.76

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                           $10,325,481.01

 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                                         $2,934,920.00
</TABLE> 

<PAGE>   6


<TABLE>
<S>                                                                                        <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                                   $4,268,043.35

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                              $530,558.32

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                                           $158,943.42

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  15th day of October, 1998.



                              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: October 15, 1998  Due Period Ending: September 30, 1998

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:


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

<TABLE>
<CAPTION>
     Series  1995-2                                    Total         Interest       Principal
           <S>        <C>                         <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>

2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------
<TABLE>
<CAPTION>

  <S>                                                                    <C>
  (a) Aggregate Investor Interest                                        $17,987,972,342.65
      Seller Interest                                                     $5,650,197,368.71

      Total Master Trust                                                 $23,638,169,711.36


  (b) Group One Investor Interest                                        $15,437,972,342.65

  (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>

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

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

      Aggregate Investor Allocation.                         $311,805,039.20    $2,508,296,244.18          $0.00

      Seller:                                                 $96,316,739.86      $774,814,023.07          $0.00

  (b) Group One Allocation                                   $267,891,135.76    $2,155,033,579.41          $0.00

  (c) Group Two Allocation                                    $43,913,903.44      $353,262,664.77          $0.00

  (d) Series 1995-2 Allocations                                $9,060,303.50       $72,885,047.93          $0.00

  (e) Class A Allocations                                      $8,611,369.54       $69,273,626.64          $0.00

      Class B Allocations                                        $448,933.96        $3,611,421.29          $0.00
</TABLE>

<PAGE>   2



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

                                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>

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

                                                                            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>

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

                                                             Deposits Into the
                                                               SIFAs This
                                                               Due Period        SIFA Balance
     <S>                                                    <C>                     <C>
     Series 1995-2                                          $2,877,194.17           $5,754,388.34
</TABLE>

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

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

     Class B                                                                    1.00000000
</TABLE>

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

                                                                                   Cumulative
                                                                              Investor Charged-Off
                                                        This Due Period              Amount
  <S>                                                    <C>                               <C>
  (a) Group One                                          $113,570,252.31                   $0.00

  (b) Group Two                                           $18,616,939.60                   $0.00

  (c) Series 1995-2                                        $3,841,041.44                   $0.00

  (d) Class A                                              $3,650,719.57                   $0.00

      Class B                                                $190,321.87                   $0.00
</TABLE>

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

                                                                               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
                                                                                Principal
                                                              Total
  <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
                                                                                Principal
                                                              Total
  <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>

12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
     -------------------------------------------------------------------
<TABLE>
<CAPTION>

  <S>                                                                          <C>
  (a) Group One                                                                $25,945,231.67

  (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>

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

                                                                                As a Percentage
                                                                                  of Class A
                                                                Total           Invested Amount
     <S>                                                       <C>                    <C>
     Series 1995-2 Class B                                     $34,210,540.00         6.8421%
</TABLE>

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

                                                            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





15.  Delinquency Summary
     -------------------

     End of Due Period Master Trust Receivables Outstanding   $24,021,453,838.82
<TABLE>
<CAPTION>
                         Delinquent Amount           Percentage of Ending
     Payment Status      Ending Balance              Receivables Outstanding
     <S>                  <C>                             <C>
     30-59 days             $651,395,072.25               2.71%

     60-179 days          $1,134,774,887.95               4.72%
</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 October 15, 1998:


<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                                                                     $3,691,232,046.31

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                        $69,273,626.64

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                                  $8,611,369.54

 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                                                         $3,611,421.29

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                                    $448,933.96

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  15th day of October, 1998.



                           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: October 15, 1998  Due Period Ending: September 30, 1998

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:

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

     Series  1995-3                                       Total         Interest       Principal
<S>                      <C>                         <C>             <C>             <C>
           Class A       30 days at 5.799840000%     $4.833200000    $4.833200000    $0.000000000

           Class B       30 days at 5.919840000%     $4.933200000    $4.933200000    $0.000000000
</TABLE>

2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------
<TABLE>
<CAPTION>

  <S>                                                                       <C>
  (a) Aggregate Investor Interest                                           $17,987,972,342.65
      Seller Interest                                                        $5,650,197,368.71

      Total Master Trust                                                    $23,638,169,711.36


  (b) Group One Investor Interest                                           $15,437,972,342.65

  (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

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.                         $311,805,039.20    $2,508,296,244.18        $0.00

      Seller:                                                 $96,316,739.86      $774,814,023.07        $0.00

  (b) Group One Allocation                                   $267,891,135.76    $2,155,033,579.41        $0.00

  (c) Group Two Allocation                                    $43,913,903.44      $353,262,664.77        $0.00

  (d) Series 1995-3 Allocations                                $9,060,303.50       $72,885,047.93        $0.00

  (e) Class A Allocations                                      $8,611,369.54       $69,273,626.64        $0.00

      Class B Allocations                                        $448,933.96        $3,611,421.29        $0.00
</TABLE>

<PAGE>   2




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

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

                                                                                   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>

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

                                                             Deposits Into the
                                                               SIFAs This
                                                               Due Period            SIFA Balance
     <S>                                                       <C>                             <C>
     Series 1995-3                                             $2,546,422.09                   $0.00
</TABLE>

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

                                                                                  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                                      $113,570,252.31                           $0.00

  (b) Group Two                                       $18,616,939.60                           $0.00

  (c) Series 1995-3                                    $3,841,041.44                           $0.00

  (d) Class A                                          $3,650,719.57                           $0.00

      Class B                                            $190,321.87                           $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>

12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
     -------------------------------------------------------------------
<TABLE>
<CAPTION>

  <S>                                                                                <C>
  (a) Group One                                                                      $25,945,231.67

  (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>

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

                                                                                    As a Percentage
                                                                                      of Class A
                                                                    Total           Invested Amount
     <S>                                                           <C>                   <C>
     Series 1995-3 Class B                                         $57,894,760.00        11.5790%
</TABLE>

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

                                                             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




15.  Delinquency Summary
     -------------------

     End of Due Period Master Trust Receivables Outstanding   $24,021,453,838.82
<TABLE>
<CAPTION>
                            Delinquent Amount           Percentage of Ending
     Payment Status         Ending Balance              Receivables Outstanding
<S>                          <C>                                 <C>
     30-59 days                $651,395,072.25                   2.71%

     60-179 days             $1,134,774,887.95                   4.72%
</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 October 15, 1998:


<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                                                                     $3,691,232,046.31

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                        $69,273,626.64

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                                  $8,611,369.54

 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                                               $2,416,600.00
</TABLE>

<PAGE>   6
 

<TABLE>
<S>                                                                                             <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                                         $3,611,421.29

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                                    $448,933.96

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                                                 $129,822.09

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  15th day of October, 1998.



                                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: October 15, 1998  Due Period Ending: September 30, 1998

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:

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

       Series  1996-1                                Total          Interest     Principal
           <S>          <C>                      <C>             <C>           <C>
           Class A      30 days at 5.759840000%  $4.799866667    $4.799866667  $0.000000000

           Class B      30 days at 5.889840000%  $4.908200000    $4.908200000  $0.000000000
</TABLE>

2.     Principal Receivables at the end of the Due Period
       --------------------------------------------------

<TABLE>

  <S>                                                     <C>
  (a)  Aggregate Investor Interest                        $17,987,972,342.65

       Seller Interest                                     $5,650,197,368.71

       Total Master Trust                                 $23,638,169,711.36


  (b)  Group One Investor Interest                        $15,437,972,342.65

  (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>

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

       Aggregate Investor Allocation                             $311,805,039.20    $2,508,296,244.18          $0.00

       Seller:                                                    $96,316,739.86      $774,814,023.07          $0.00

  (b)  Group One Allocation                                      $267,891,135.76    $2,155,033,579.41          $0.00

  (c)  Group Two Allocation                                       $43,913,903.44      $353,262,664.77          $0.00

  (d)  Series 1996-1 Allocations                                  $18,120,606.98      $145,770,095.87          $0.00

  (e)  Class A Allocations                                        $17,222,739.07      $138,547,253.28          $0.00

       Class B Allocations                                           $897,867.91        $7,222,842.59          $0.00
</TABLE>
<PAGE>   2
 


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

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

6.     Information Concerning the Series Interest Funding Accounts ("SIFA")
       --------------------------------------------------------------------
<TABLE>
<CAPTION>
                                                               Deposits Into the
                                                                 SIFAs This
                                                                 Due Period           SIFA Balance
       <S>                                                    <C>                               <C>
       Series 1996-1                                          $5,058,195.05                     $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                           $113,570,252.31                              $0.00

  (b)  Group Two                            $18,616,939.60                              $0.00

  (c)  Series 1996-1                         $7,682,082.88                              $0.00

  (d)  Class A                               $7,301,439.13                              $0.00

       Class B                                 $380,643.75                              $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>


12.    Investor Monthly Servicing Fee Payable at the end of the Due Period
       -------------------------------------------------------------------
<TABLE>

  <S>                                                                      <C>
  (a)  Group One                                                           $25,945,231.67

  (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>

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

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





15.  Delinquency Summary
     -------------------

     End of Due Period Master Trust Receivables Outstanding   $24,021,453,838.82
<TABLE>
<CAPTION>
                         Delinquent Amount               Percentage of Ending
     Payment Status      Ending Balance                  Receivables Outstanding
     <S>                  <C>                                      <C>      
     30-59 days           $651,395,072.25                          2.71%

     60-179 days          $1,134,774,887.95                        4.72%
</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 October 15, 1998:


<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                                                                     $3,691,232,046.31

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                       $138,547,253.28

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                                 $17,222,739.07

 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                                               $4,799,866.67
</TABLE>

<PAGE>   6


<TABLE>
<S>                                                                                             <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                                         $7,222,842.59

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                                    $897,867.91

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                                                 $258,328.38

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  15th day of October, 1998.



                           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: October 15, 1998  Due Period Ending: September 30, 1998

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:

1.     Payments for the benefit of Series Investors this Due Period (per $1000
       -----------------------------------------------------------------------
       of Class Initial Investor Interest)
       -----------------------------------
<TABLE>
<CAPTION>
       Series  1996-2                                  Total        Interest     Principal
           <S>          <C>                      <C>             <C>           <C>
           Class A      30 days at 5.809840000%  $4.841533333    $4.841533333  $0.000000000

           Class B      30 days at 5.949840000%  $4.958200000    $4.958200000  $0.000000000
</TABLE>

2.     Principal Receivables at the end of the Due Period
       --------------------------------------------------
<TABLE>
 <S>                                                      <C>
  (a)  Aggregate Investor Interest                        $17,987,972,342.65
       Seller Interest                                     $5,650,197,368.71

       Total Master Trust                                 $23,638,169,711.36


  (b)  Group One Investor Interest                        $15,437,972,342.65

  (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>

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

       Aggregate Investor Allocation.                            $311,805,039.20         $2,508,296,244.18            $0.00

       Seller:                                                    $96,316,739.86           $774,814,023.07            $0.00

  (b)  Group One Allocation                                      $267,891,135.76         $2,155,033,579.41            $0.00

  (c)  Group Two Allocation                                       $43,913,903.44           $353,262,664.77            $0.00

  (d)  Series 1996-2 Allocations                                  $16,324,871.16           $131,324,410.69            $0.00

  (e)  Class A Allocations                                        $15,508,627.60           $124,758,190.16            $0.00

       Class B Allocations                                           $816,243.56             $6,566,220.53            $0.00
</TABLE>



<PAGE>   2

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

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

6.     Information Concerning the Series Interest Funding Accounts ("SIFA")
       --------------------------------------------------------------------
<TABLE>
<CAPTION>
                                                              Deposits Into the
                                                                SIFAs This
                                                                Due Period               SIFA Balance
       <S>                                                        <C>                              <C>
       Series 1996-2                                              $4,592,244.98                    $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                           $113,570,252.31                         $0.00

  (b)  Group Two                            $18,616,939.60                         $0.00

  (c)  Series 1996-2                         $6,920,795.39                         $0.00

  (d)  Class A                               $6,574,755.62                         $0.00

       Class B                                 $346,039.77                         $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>


12.    Investor Monthly Servicing Fee Payable at the end of the Due Period
       -------------------------------------------------------------------
<TABLE>
  <S>                                                                                   <C>
  (a)  Group One                                                                        $25,945,231.67

  (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>

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

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

       End of Due Period Master Trust Receivables Outstanding $24,021,453,838.82
<TABLE>
<CAPTION>
                                   Delinquent Amount         Percentage of Ending
       Payment Status              Ending Balance            Receivables Outstanding
       <S>                          <C>                               <C>
       30-59 days                     $651,395,072.25                 2.71%

       60-179 days                  $1,134,774,887.95                 4.72%

</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 October 15, 1998:


<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                                                                     $3,691,232,046.31

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                       $124,758,190.16

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                                 $15,508,627.60

 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                                                $4,357,380.00
</TABLE>

<PAGE>   6

<TABLE>
<S>                                                                                             <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                                         $6,566,220.53

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                                    $816,243.56

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                                                  $234,864.98

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 15th day of October, 1998.



                           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: October 15, 1998  Due Period Ending: September 30, 1998

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:

1.   Payments for the benefit of Series Investors this Due Period (per $1000 of
     --------------------------------------------------------------------------
     Class Initial Investor Interest)
     --------------------------------
<TABLE>
<CAPTION>
     Series  1996-3                                         Total        Interest          Principal
<S>                     <C>                            <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>

2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------
<TABLE>
<S>                                                     <C>
  (a)Aggregate Investor Interest                        $17,987,972,342.65
     Seller Interest                                     $5,650,197,368.71

     Total Master Trust                                 $23,638,169,711.36


  (b)Group One Investor Interest                        $15,437,972,342.65

  (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>

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

     Aggregate Investor Allocation.                             $311,805,039.20      $2,508,296,244.18                 $0.00

     Seller:                                                     $96,316,739.86        $774,814,023.07                 $0.00

  (b)Group One Allocation                                       $267,891,135.76      $2,155,033,579.41                 $0.00

  (c)Group Two Allocation                                        $43,913,903.44        $353,262,664.77                 $0.00

  (d)Series 1996-3 Allocations                                   $10,856,039.33         $87,330,733.11                 $0.00

  (e)Class A Allocations                                         $10,325,481.01         $83,062,689.76                 $0.00

     Class B Allocations                                            $530,558.32          $4,268,043.35                 $0.00
</TABLE>

<PAGE>   2

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

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

6.   Information Concerning the Series Interest Funding Accounts ("SIFA")
     --------------------------------------------------------------------
<TABLE>
<CAPTION>
                                           Deposits Into the
                                              SIFAs This
                                              Due Period          SIFA Balance
<S>                                           <C>                   <C>
     Series 1996-3                            $3,189,473.96         $6,378,947.92
</TABLE>

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

     Class B                                                     1.00000000
</TABLE>

8.   Investor Charged-Off Amount
     ---------------------------
<TABLE>
<CAPTION>
                                                                    Cumulative
                                                                Investor Charged-Off
                                        This Due Period               Amount
<S>                                       <C>                                <C>
  (a)Group One                            $113,570,252.31                    $0.00

  (b)Group Two                             $18,616,939.60                    $0.00

  (c)Series 1996-3                          $4,602,328.93                    $0.00

  (d)Class A                                $4,377,403.08                    $0.00

     Class B                                  $224,925.85                    $0.00
</TABLE>

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

12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
     -------------------------------------------------------------------
<TABLE>
<S>                                                                            <C>
  (a)Group One                                                                 $25,945,231.67

  (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>

13.  Class Available Subordinated Amount at the end of the Due Period
     ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                                          As a Percentage
                                                                                            of Class A
                                                                         Total            Invested Amount
<S>                                                                     <C>                      <C>
     Series 1996-3 Class B                                              $37,894,740.00           6.3158%
</TABLE>

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

15.  Delinquency Summary
     -------------------

     End of Due Period Master Trust Receivables Outstanding   $24,021,453,838.82

<TABLE>
<CAPTION>
                              Delinquent Amount       Percentage of Ending
     Payment Status           Ending Balance          Receivables Outstanding
<S>                            <C>                             <C>
     30-59 days                  $651,395,072.25               2.71%

     60-179 days               $1,134,774,887.95               4.72%
</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 October 15, 1998:


<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                                                        $3,691,232,046.31

   4.  The aggregate amount of Class A Principal Collections processed during
       the related Due Period is equal to                                           $83,062,689.76

   5.  The aggregate amount of Class A Finance Charge Collections processed
       during the related Due Period is equal to                                    $10,325,481.01

   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                                            $4,268,043.35

  10.  The aggregate amount of Class B Finance Charge Collections processed
       during the related Due Period is equal to                                       $530,558.32

  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  15th day of October, 1998.



                                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: October 15, 1998  Due Period Ending: September 30, 1998

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:

1.   Payments for the benefit of Series Investors this Due Period (per $1000 of
     --------------------------------------------------------------------------
     Class Initial Investor Interest)
     --------------------------------
<TABLE>
<CAPTION>
     Series  1996-4                                          Total        Interest          Principal
<S>                      <C>                           <C>            <C>                <C>
         Class A         30 days at 5.964840000%       $4.970700000   $4.970700000       $0.000000000

         Class B         30 days at 6.139840000%       $5.116533333   $5.116533333       $0.000000000
</TABLE>

2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------
<TABLE>
<S>                                                          <C>
  (a)Aggregate Investor Interest                             $17,987,972,342.65
     Seller Interest                                          $5,650,197,368.71

     Total Master Trust                                      $23,638,169,711.36


  (b)Group One Investor Interest                             $15,437,972,342.65

  (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>

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

     Aggregate Investor Allocation.                          $311,805,039.20         $2,508,296,244.18                 $0.00

     Seller:                                                  $96,316,739.86           $774,814,023.07                 $0.00

  (b)Group One Allocation                                    $267,891,135.76         $2,155,033,579.41                 $0.00

  (c)Group Two Allocation                                     $43,913,903.44           $353,262,664.77                 $0.00

  (d)Series 1996-4 Allocations                                $18,120,606.98           $145,770,095.87                 $0.00

  (e)Class A Allocations                                      $17,222,739.07           $138,547,253.28                 $0.00

     Class B Allocations                                         $897,867.91             $7,222,842.59                 $0.00
</TABLE>

<PAGE>   2

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

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

6.   Information Concerning the Series Interest Funding Accounts ("SIFA")
     --------------------------------------------------------------------
<TABLE>
<CAPTION>
                                            Deposits Into the
                                               SIFAs This
                                               Due Period         SIFA Balance
<S>                                            <C>                           <C>
     Series 1996-4                             $5,239,993.38                 $0.00
</TABLE>

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

     Class B                                                     1.00000000
</TABLE>

8.   Investor Charged-Off Amount
     ---------------------------
<TABLE>
<CAPTION>
                                                                     Cumulative
                                                                Investor Charged-Off
                                            This Due Period           Amount
<S>                                          <C>                             <C>
  (a)Group One                               $113,570,252.31                 $0.00

  (b)Group Two                                $18,616,939.60                 $0.00

  (c)Series 1996-4                             $7,682,082.88                 $0.00

  (d)Class A                                   $7,301,439.13                 $0.00

     Class B                                     $380,643.75                 $0.00
</TABLE>

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

12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
     -------------------------------------------------------------------
<TABLE>
<S>                                                                              <C>
  (a)Group One                                                                   $25,945,231.67

  (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>

13.  Class Available Subordinated Amount at the end of the Due Period
     ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                  As a Percentage
                                                                    of Class A
                                              Total               Invested Amount
<S>                                         <C>                        <C>
     Series 1996-4 Class B                  $115,789,520.00            11.5790%
</TABLE>

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

15.  Delinquency Summary
     -------------------

     End of Due Period Master Trust Receivables Outstanding   $24,021,453,838.82

<TABLE>
<CAPTION>
                                Delinquent Amount       Percentage of Ending
     Payment Status             Ending Balance          Receivables Outstanding
<S>                              <C>                           <C>
     30-59 days                    $651,395,072.25             2.71%

     60-179 days                 $1,134,774,887.95             4.72%
</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 October 15, 1998:


<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                                                         $3,691,232,046.31

  4.  The aggregate amount of Class A Principal Collections processed during
      the related Due Period is equal to                                           $138,547,253.28

  5.  The aggregate amount of Class A Finance Charge Collections processed
      during the related Due Period is equal to                                     $17,222,739.07

  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                                   $4,970,700.00
</TABLE>
<PAGE>   6
<TABLE>
<S>                                                                              <C>
  9.  The aggregate amount of Class B Principal Collections processed during
      the related Due Period is equal to                                             $7,222,842.59

 10.  The aggregate amount of Class B Finance Charge Collections processed
      during the related Due Period is equal to                                        $897,867.91

 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                                      $269,293.38

 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  15th day of October, 1998.



                                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: October 15, 1998  Due Period Ending: September 30, 1998

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:

1.   Payments for the benefit of Series Investors this Due Period (per $1000 of
     --------------------------------------------------------------------------
     Class Initial Investor Interest)
     --------------------------------
<TABLE>
<CAPTION>
     Series  1997-1                                       Total        Interest        Principal
<S>                   <C>                           <C>             <C>              <C>
         Class A      30 days at 5.679840000%       $4.733200000    $4.733200000     $0.000000000

         Class B      30 days at 5.859840000%       $4.883200000    $4.883200000     $0.000000000
</TABLE>

2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------
<TABLE>
<S>                                                                      <C>
  (a)Aggregate Investor Interest                                         $17,987,972,342.65
     Seller Interest                                                      $5,650,197,368.71

     Total Master Trust                                                  $23,638,169,711.36


  (b)Group One Investor Interest                                         $15,437,972,342.65

  (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>

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

     Aggregate Investor Allocation.                              $311,805,039.20     $2,508,296,244.18                  $0.00

     Seller:                                                      $96,316,739.86       $774,814,023.07                  $0.00

  (b)Group One Allocation                                        $267,891,135.76     $2,155,033,579.41                  $0.00

  (c)Group Two Allocation                                         $43,913,903.44       $353,262,664.77                  $0.00

  (d)Series 1997-1 Allocations                                    $13,590,455.24       $109,327,571.90                  $0.00

  (e)Class A Allocations                                          $12,896,648.22       $103,746,284.45                  $0.00

     Class B Allocations                                             $693,807.02         $5,581,287.45                  $0.00
</TABLE>

<PAGE>   2

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

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

6.   Information Concerning the Series Interest Funding Accounts ("SIFA")
     --------------------------------------------------------------------
<TABLE>
<CAPTION>
                                                             Deposits Into the
                                                               SIFAs This
                                                               Due Period          SIFA Balance
<S>                                                            <C>                            <C>
     Series 1997-1                                             $3,742,659.44                  $0.00
</TABLE>

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

     Class B                                                    1.00000000
</TABLE>

8.   Investor Charged-Off Amount
     ---------------------------
<TABLE>
<CAPTION>
                                                                     Cumulative
                                                                Investor Charged-Off
                                        This Due Period                Amount
<S>                                      <C>                                   <C>
  (a)Group One                           $113,570,252.31                       $0.00

  (b)Group Two                            $18,616,939.60                       $0.00

  (c)Series 1997-1                         $5,761,562.16                       $0.00

  (d)Class A                               $5,467,428.36                       $0.00

     Class B                                 $294,133.80                       $0.00
</TABLE>

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

12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
     -------------------------------------------------------------------
<TABLE>
<S>                                                                                     <C>
  (a)Group One                                                                          $25,945,231.67

  (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>

13.  Class Available Subordinated Amount at the end of the Due Period
     ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                                        As a Percentage
                                                                                          of Class A
                                                                    Total               Invested Amount
<S>                                                                <C>                       <C>
     Series 1997-1 Class B                                         $98,684,250.00            13.1579%
</TABLE>

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

15.  Delinquency Summary
     -------------------

     End of Due Period Master Trust Receivables Outstanding   $24,021,453,838.82

<TABLE>
<CAPTION>
                                 Delinquent Amount          Percentage of Ending
     Payment Status              Ending Balance             Receivables Outstanding
<S>                               <C>                                 <C>
     30-59 days                     $651,395,072.25                   2.71%

     60-179 days                  $1,134,774,887.95                   4.72%
</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 October 15, 1998:


<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                                                         $3,691,232,046.31

  4.  The aggregate amount of Class A Principal Collections processed during
      the related Due Period is equal to                                           $103,746,284.45

  5.  The aggregate amount of Class A Finance Charge Collections processed
      during the related Due Period is equal to                                     $12,896,648.22

  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                                   $3,549,900.00
</TABLE>
<PAGE>   6
<TABLE>
<S>                                                                              <C>
  9.  The aggregate amount of Class B Principal Collections processed during
      the related Due Period is equal to                                             $5,581,287.45

 10.  The aggregate amount of Class B Finance Charge Collections processed
      during the related Due Period is equal to                                        $693,807.02

 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                                     $192,759.44

 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 15th day of October, 1998.



                                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: October 15, 1998  Due Period Ending: September 30, 1998

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:

1.   Payments for the benefit of Series Investors this Due Period (per $1000 of
     --------------------------------------------------------------------------
     Class Initial Investor Interest)
     --------------------------------
<TABLE>
<CAPTION>
     Series  1997-2                                            Total       Interest          Principal
<S>                        <C>                           <C>            <C>                <C>
         Class A           30 days at 6.792000000%       $5.660000000   $5.660000000       $0.000000000

         Class B           30 days at 5.989840000%       $4.991533333   $4.991533333       $0.000000000
</TABLE>

2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------
<TABLE>
<S>                                                                            <C>
  (a)Aggregate Investor Interest                                               $17,987,972,342.65
     Seller Interest                                                            $5,650,197,368.71

     Total Master Trust                                                        $23,638,169,711.36


  (b)Group One Investor Interest                                               $15,437,972,342.65

  (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>

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

     Aggregate Investor Allocation.                            $311,805,039.20        $2,508,296,244.18                   $0.00

     Seller:                                                    $96,316,739.86          $774,814,023.07                   $0.00

  (b)Group One Allocation                                      $267,891,135.76        $2,155,033,579.41                   $0.00

  (c)Group Two Allocation                                       $43,913,903.44          $353,262,664.77                   $0.00

  (d)Series 1997-2 Allocations                                   $9,060,303.50           $72,885,047.93                   $0.00

  (e)Class A Allocations                                         $8,611,369.54           $69,273,626.64                   $0.00

     Class B Allocations                                           $448,933.96            $3,611,421.29                   $0.00
</TABLE>

<PAGE>   2

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

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

     *Rates are only applicable during the Class A Controlled Liquidation
     Period.

6.   Information Concerning the Series Interest Funding Accounts ("SIFA")
     --------------------------------------------------------------------
<TABLE>
<CAPTION>
                                            Deposits Into the
                                              SIFAs This
                                              Due Period               SIFA Balance
<S>                                           <C>                                 <C>
     Series 1997-2                            $2,961,357.19                       $0.00
</TABLE>

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

     Class B                                                            1.00000000
</TABLE>

8.   Investor Charged-Off Amount
     ---------------------------
<TABLE>
<CAPTION>
                                                                         Cumulative
                                                                     Investor Charged-Off
                                        This Due Period                    Amount
<S>                                      <C>                                        <C>
  (a)Group One                           $113,570,252.31                            $0.00

  (b)Group Two                            $18,616,939.60                            $0.00

  (c)Series 1997-2                         $3,841,041.44                            $0.00

  (d)Class A                               $3,650,719.57                            $0.00

     Class B                                 $190,321.87                            $0.00
</TABLE>

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

12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
     -------------------------------------------------------------------
<TABLE>
<S>                                                                                      <C>
  (a)Group One                                                                           $25,945,231.67

  (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>

13.  Class Available Subordinated Amount at the end of the Due Period
     ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                                          As a Percentage
                                                                                            of Class A
                                                                    Total                 Invested Amount
<S>                                                                <C>                           <C>
     Series 1997-2 Class B                                         $47,368,440.00                9.4737%
</TABLE>

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

15.  Delinquency Summary
     -------------------

     End of Due Period Master Trust Receivables Outstanding   $24,021,453,838.82

<TABLE>
<CAPTION>
                            Delinquent Amount       Percentage of Ending
     Payment Status         Ending Balance          Receivables Outstanding
<S>                          <C>                             <C>
     30-59 days                $651,395,072.25               2.71%

     60-179 days             $1,134,774,887.95               4.72%
</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 October 15, 1998:


<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                                                         $3,691,232,046.31

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                            $69,273,626.64

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                      $8,611,369.54

 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                                             $3,611,421.29

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                        $448,933.96

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                                     $131,357.19

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  15th day of October, 1998.
</TABLE>



                           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: October 15, 1998  Due Period Ending: September 30, 1998

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:

1.   Payments for the benefit of Series Investors this Due Period (per $1000 of
     ---------------------------------------------------------------------------
     Class Initial Investor Interest)
     --------------------------------
<TABLE>
<CAPTION>
     Series  1997-3                                   Total          Interest        Principal
<S>                   <C>                         <C>             <C>             <C>
         Class A      30 days at 5.719840000%      $4.766533333    $4.766533333    $0.000000000

         Class B      30 days at 5.899840000%      $4.916533333    $4.916533333    $0.000000000
</TABLE>

2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------
<TABLE>
<S>                                                     <C>
  (a) Aggregate Investor Interest                       $17,987,972,342.65
      Seller Interest                                    $5,650,197,368.71

      Total Master Trust                                $23,638,169,711.36


  (b) Group One Investor Interest                       $15,437,972,342.65

  (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>

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

      Aggregate Investor Allocation.                          $311,805,039.20      $2,508,296,244.18       $0.00

      Seller:                                                  $96,316,739.86        $774,814,023.07       $0.00

  (b) Group One Allocation                                    $267,891,135.76      $2,155,033,579.41       $0.00

  (c) Group Two Allocation                                     $43,913,903.44        $353,262,664.77       $0.00

  (d) Series 1997-3 Allocations                                $11,753,907.23         $94,553,575.69       $0.00

  (e) Class A Allocations                                      $11,182,536.74         $89,957,221.32       $0.00

      Class B Allocations                                         $571,370.49          $4,596,354.37       $0.00

</TABLE>

<PAGE>   2



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

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

6.   Information Concerning the Series Interest Funding Accounts ("SIFA")
     --------------------------------------------------------------------
<TABLE>
<CAPTION>
                                          Deposits Into the
                                              SIFAs This
                                              Due Period     SIFA Balance
<S>                                      <C>                      <C>
     Series 1997-3                         $3,266,446.19            $0.00
</TABLE>

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

     Class B                                                 1.00000000
</TABLE>

8.   Investor Charged-Off Amount
     ---------------------------
<TABLE>
<CAPTION>
                                                                 Cumulative
                                                            Investor Charged-Off
                                          This Due Period         Amount
<S>                                      <C>                        <C>
  (a) Group One                          $113,570,252.31            $0.00

  (b) Group Two                           $18,616,939.60            $0.00

  (c) Series 1997-3                        $4,982,972.68            $0.00

  (d) Class A                              $4,740,744.84            $0.00

      Class B                                $242,227.84            $0.00
</TABLE>

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

12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
     -------------------------------------------------------------------
<TABLE>
<S>                                                       <C>
  (a) Group One                                           $25,945,231.67

  (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>
13.  Class Available Subordinated Amount at the end of the Due Period
     ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                             As a Percentage
                                                               of Class A
                                                 Total       Invested Amount
<S>                                          <C>               <C>
     Series 1997-3 Class B                   $85,526,375.00    13.1579%
</TABLE>

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


15.  Delinquency Summary
     -------------------
     End of Due Period Master Trust Receivables Outstanding   $24,021,453,838.82
<TABLE>
<CAPTION>
                        Delinquent Amount    Percentage of Ending
     Payment Status      Ending Balance     Receivables Outstanding
<S>                   <C>                      <C>
     30-59 days         $651,395,072.25          2.71%

     60-179 days      $1,134,774,887.95          4.72%
</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 October 15, 1998:

<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                                                         $3,691,232,046.31

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                            $89,957,221.32

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                     $11,182,536.74

 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                                   $3,098,246.67
</TABLE>
<PAGE>   6

<TABLE>
<S>                                                                             <C>

 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                            $4,596,354.37

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                       $571,370.49

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-Of                       $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                                    $168,199.52

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 15th day of October, 1998.



                           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: October 15, 1998  Due Period Ending: September 30, 1998

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:

1.   Payments for the benefit of Series Investors this Due Period (per $1000 of
     --------------------------------------------------------------------------
     Class Initial Investor Interest)
     --------------------------------
<TABLE>
<CAPTION>
     Series  1997-4                                   Total          Interest        Principal
<S>                   <C>                         <C>              <C>             <C>
         Class A      30 days at 5.659840000%      $4.716533333    $4.716533333    $0.000000000

         Class B      30 days at 5.839840000%      $4.866533333$   $4.866533333     $0.000000000
</TABLE>

2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------
<TABLE>
<S>                                                     <C>
  (a) Aggregate Investor Interest                       $17,987,972,342.65
      Seller Interest                                    $5,650,197,368.71

      Total Master Trust                                $23,638,169,711.36

  (b) Group One Investor Interest                       $15,437,972,342.65

  (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>

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

      Aggregate Investor Allocation.                          $311,805,039.20      $2,508,296,244.18       $0.00

      Seller:                                                  $96,316,739.86        $774,814,023.07       $0.00

  (b) Group One Allocation                                    $267,891,135.76      $2,155,033,579.41       $0.00

  (c) Group Two Allocation                                     $43,913,903.44        $353,262,664.77       $0.00

  (d) Series 1997-4 Allocations                                $13,590,455.24        $109,327,571.90       $0.00

  (e) Class A Allocations                                      $12,896,648.22        $103,746,284.45       $0.00

      Class B Allocations                                         $693,807.02          $5,581,287.45       $0.00
</TABLE>

<PAGE>   2

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

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

6.   Information Concerning the Series Interest Funding Accounts ("SIFA")
     --------------------------------------------------------------------
<TABLE>
<CAPTION>
                                         Deposits Into the
                                           SIFAs This
                                           Due Period           SIFA Balance
<S>                                       <C>                      <C>
     Series 1997-4                         $3,729,501.54            $0.00
</TABLE>

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

     Class B                                                 1.00000000
</TABLE>

8.   Investor Charged-Off Amount
     ---------------------------
<TABLE>
<CAPTION>
                                                                   Cumulative
                                                              Investor Charged-Off
                                         This Due Period            Amount
<S>                                      <C>                        <C>
  (a) Group One                          $113,570,252.31            $0.00
                                                                         
  (b) Group Two                           $18,616,939.60            $0.00
                                                                         
  (c) Series 1997-4                        $5,761,562.16            $0.00
                                                                         
  (d) Class A                              $5,467,428.36            $0.00
                                                                         
      Class B                                $294,133.80            $0.00
</TABLE>

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

12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
     -------------------------------------------------------------------
<TABLE>
<S>                                                       <C>
  (a) Group One                                           $25,945,231.67

  (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>

13.  Class Available Subordinated Amount at the end of the Due Period
     ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                             As a Percentage
                                                               of Class A
                                                 Total       Invested Amount

<S>                                          <C>               <C>
     Series 1997-4 Class B                   $98,684,250.00    13.1579%
</TABLE>

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


15.  Delinquency Summary
     -------------------
     End of Due Period Master Trust Receivables Outstanding   $24,021,453,838.82
<TABLE>
<CAPTION>

                       Delinquent Amount      Percentage of Ending
     Payment Status      Ending Balance     Receivables Outstanding

<S>                   <C>                           <C>
     30-59 days         $651,395,072.25              2.71%

     60-179 days      $1,134,774,887.95              4.72%
</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 October 15, 1998:

<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                                                        $3,691,232,046.31

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                          $103,746,284.45

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                    $12,896,648.22

 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                                  $3,537,400.00
</TABLE>

<PAGE>   6

<TABLE>
<S>                                                                             <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                            $5,581,287.45

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                       $693,807.02

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                                    $192,101.54

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  15th day of October, 1998.



                           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: October 15, 1998  Due Period Ending: September 30, 1998

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:

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

     Series  1998-1                                   Total          Interest     Principal
<S>                   <C>                         <C>              <C>             <C>
         Class A      30 days at 5.679840000%      $4.733200000    $4.733200000    $0.000000000

         Class B      30 days at 5.859840000%      $4.883200000    $4.883200000    $0.000000000
</TABLE>

2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------
<TABLE>

<S>                                                     <C>
  (a) Aggregate Investor Interest                       $17,987,972,342.65
      Seller Interest                                    $5,650,197,368.71

      Total Master Trust                                $23,638,169,711.36


  (b) Group One Investor Interest                       $15,437,972,342.65

  (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>

3.   Allocation of Receivables Collected During the Due Period
     ---------------------------------------------------------
<TABLE>
<CAPTION>
                                                               Finance Charge        Principal           Yield
                                                                Collections         Collections        Collections
  (a) Allocation of Collections between Investor and Seller
<S>                                                           <C>                  <C>                     <C>
      Aggregate Investor Allocation.                          $311,805,039.20       $2,508,296,244.18      $0.00

      Seller:                                                  $96,316,739.86         $774,814,023.07      $0.00

  (b) Group One Allocation                                    $267,891,135.76       $2,155,033,579.41      $0.00

  (c) Group Two Allocation                                     $43,913,903.44         $353,262,664.77      $0.00

  (d) Series 1998-1 Allocations                                 $6,366,699.75          $51,216,520.17      $0.00
                                                                                      
  (e) Class A Allocations                                       $6,040,202.33          $48,590,031.96      $0.00

      Class B Allocations                                         $326,497.42           $2,626,488.21      $0.00
</TABLE>


<PAGE>   2


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

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

6.   Information Concerning the Series Interest Funding Accounts ("SIFA")
     --------------------------------------------------------------------
<TABLE>
<CAPTION>
                                         Deposits Into the
                                           SIFAs This
                                           Due Period           SIFA Balance
<S>                                      <C>                      <C>
     Series 1998-1                        $1,746,578.31            $0.00
</TABLE>

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

     Class B                                                 1.00000000
</TABLE>

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

<S>                                      <C>                        <C>
  (a) Group One                          $113,570,252.31            $0.00

  (b) Group Two                           $18,616,939.60            $0.00

  (c) Series 1998-1                        $2,699,110.20            $0.00

  (d) Class A                              $2,560,694.29            $0.00

      Class B                                $138,415.91            $0.00
</TABLE>

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


12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
     -------------------------------------------------------------------
<TABLE>
<CAPTION>
<S>                                                       <C>
  (a) Group One                                           $25,945,231.67

  (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>

13.  Class Available Subordinated Amount at the end of the Due Period
     ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                             As a Percentage
                                                               of Class A
                                                 Total       Invested Amount

<S>                                          <C>               <C>
     Series 1998-1 Class B                   $46,052,750.00    13.1579%
</TABLE>

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

                                             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





15.  Delinquency Summary
     -------------------

     End of Due Period Master Trust Receivables Outstanding   $24,021,453,838.82
<TABLE>
<CAPTION>

                         Delinquent Amount  Percentage of Ending
     Payment Status      Ending Balance     Receivables Outstanding

     <S>              <C>                      <C>
     30-59 days           $651,395,072.25        2.71%

     60-179 days        $1,134,774,887.95        4.72%
</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 October 15, 1998:


<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                                                        $3,691,232,046.31

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                           $48,590,031.96

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                     $6,040,202.33

 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                                  $1,656,620.00

</TABLE>
<PAGE>   6

<TABLE>
<S>                                                                             <C>

 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                            $2,626,488.21

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                       $326,497.42

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                                     $89,958.31

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 15th day of October, 1998.



                           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

<TABLE>
<S>                                            <C>
Trust Distribution Date: October 15, 1998      Due Period Ending:  September 30, 1998
</TABLE>

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:

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

<TABLE>
<CAPTION>
     Series  1998-2                                   Total        Interest      Principal
<S>                   <C>                        <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>

2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------

<TABLE>
<S>                                                     <C>               
  (a) Aggregate Investor Interest                        $17,987,972,342.65
      Seller Interest                                     $5,650,197,368.71

      Total Master Trust                                 $23,638,169,711.36


  (b) Group One Investor Interest                        $15,437,972,342.65

  (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>

3.   Allocation of Receivables Collected During the Due Period
     ---------------------------------------------------------

<TABLE>
<CAPTION>
                                                               Finance Charge          Principal              Yield
                                                                Collections           Collections          Collections

  (a) Allocation of Collections between Investor and Seller

<S>                                                           <C>                   <C>                       <C>  
      Aggregate Investor Allocation.                           $311,805,039.20       $2,508,296,244.18         $0.00

      Seller:                                                   $96,316,739.86         $774,814,023.07         $0.00

  (b) Group One Allocation                                     $267,891,135.76       $2,155,033,579.41         $0.00

  (c) Group Two Allocation                                      $43,913,903.44         $353,262,664.77         $0.00

  (d) Series 1998-2 Allocations                                  $9,060,303.50          $72,885,047.93         $0.00

  (e) Class A Allocations                                        $8,611,369.54          $69,273,626.64         $0.00

      Class B Allocations                                          $448,933.96           $3,611,421.29         $0.00
</TABLE>


<PAGE>   2


4.   Information Concerning the Series Principal Funding Accounts ("SPFA")
     ---------------------------------------------------------------------

<TABLE>
<CAPTION>
                         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>

5.   Information Concerning Amount of Controlled Liquidation Payments
     ----------------------------------------------------------------

<TABLE>
<CAPTION>
                                                                   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>

6.   Information Concerning the Series Interest Funding Accounts ("SIFA")
     --------------------------------------------------------------------

<TABLE>
<CAPTION>
                                          Deposits Into the
                                              SIFAs This
                                              Due Period       SIFA Balance
<S>                                        <C>                 <C>          
     Series 1998-2                         $2,547,150.17       $2,547,150.17
</TABLE>

7.   Pool Factors
     ------------
<TABLE>
<CAPTION>
                                                            This Due Period

<S>                                                            <C>       
     Class A                                                   1.00000000

     Class B                                                   1.00000000
</TABLE>

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

<S>                                      <C>                        <C>  
  (a) Group One                          $113,570,252.31            $0.00

  (b) Group Two                           $18,616,939.60            $0.00

  (c) Series 1998-2                        $3,841,041.44            $0.00

  (d) Class A                              $3,650,719.57            $0.00

      Class B                                $190,321.87            $0.00
</TABLE>

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

12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
     -------------------------------------------------------------------

<TABLE>
<S>                                                       <C>           
  (a) Group One                                           $25,945,231.67

  (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>

13.  Class Available Subordinated Amount at the end of the Due Period
     ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                               As a Percentage
                                                                 of Class A
                                                  Total        Invested Amount

<S>                                          <C>                   <C>    
     Series 1998-2 Class B                   $44,736,860.00        8.9474%
</TABLE>

14.  Total Available Credit Enhancement Amounts
     ------------------------------------------

<TABLE>
<CAPTION>
                                                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


15.  Delinquency Summary
     -------------------

<TABLE>
<CAPTION>
     End of Due Period Master Trust Receivables Outstanding      $24,021,453,838.82


                       Delinquent Amount     Percentage of Ending
    Payment Status      Ending Balance      Receivables Outstanding

<S>                  <C>                        <C>  
     30-59 days         $651,395,072.25            2.71%

     60-179 days      $1,134,774,887.95            4.72%
</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 October 15, 1998:


<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                                                              $3,691,232,046.31

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                  $69,273,626.64

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                            $8,611,369.54

 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                                                   $3,611,421.29

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                              $448,933.96

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 15th day of October, 1998.



                           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


<TABLE>
<S>                                            <C> 
Trust Distribution Date: October 15, 1998      Due Period Ending:  September 30, 1998
</TABLE>

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:

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

<TABLE>
<CAPTION>
  Series  1998-3                                   Total         Interest      Principal
<S>                   <C>                       <C>            <C>            <C>         
         Class A      30 days at 5.714840000%   $4.762366667   $4.762366667   $0.000000000

         Class B      30 days at 5.879840000%   $4.899866667   $4.899866667   $0.000000000
</TABLE>

2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------

<TABLE>
<S>                                                     <C>               
  (a) Aggregate Investor Interest                       $17,987,972,342.65
      Seller Interest                                    $5,650,197,368.71

      Total Master Trust                                $23,638,169,711.36


  (b) Group One Investor Interest                       $15,437,972,342.65

  (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>

3.   Allocation of Receivables Collected During the Due Period
     ---------------------------------------------------------

<TABLE>
<CAPTION>
                                                               Finance Charge       Principal         Yield
                                                                Collections        Collections     Collections

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

      Aggregate Investor Allocation                           $311,805,039.20   $2,508,296,244.18     $0.00

      Seller                                                   $96,316,739.86     $774,814,023.07     $0.00

  (b) Group One Allocation                                    $267,891,135.76   $2,155,033,579.41     $0.00

  (c) Group Two Allocation                                     $43,913,903.44     $353,262,664.77     $0.00

  (d) Series 1998-3 Allocations                                $13,590,455.24     $109,327,571.90     $0.00

  (e) Class A Allocations                                      $12,896,648.22     $103,746,284.45     $0.00

      Class B Allocations                                         $693,807.02       $5,581,287.45     $0.00
</TABLE>


<PAGE>   2


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

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

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

<S>                                          <C>                      <C>  
     Series 1998-3                           $3,765,192.34            $0.00
</TABLE>

7.   Pool Factors
     ------------
<TABLE>
<CAPTION>
                                                            This Due Period

<S>                                                          <C>       
     Class A                                                 1.00000000

     Class B                                                 1.00000000
</TABLE>

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

<S>                                      <C>                        <C>  
  (a) Group One                          $113,570,252.31            $0.00

  (b) Group Two                           $18,616,939.60            $0.00

  (c) Series 1998-3                        $5,761,562.16            $0.00

  (d) Class A                              $5,467,428.36            $0.00

      Class B                                $294,133.80            $0.00
</TABLE>

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

12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
     -------------------------------------------------------------------

<TABLE>
<S>                                                       <C>           
  (a) Group One                                           $25,945,231.67

  (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>

13.  Class Available Subordinated Amount at the end of the Due Period
     ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                               As a Percentage
                                                                 of Class A
                                                 Total         Invested Amount

<S>                                          <C>                  <C>     
     Series 1998-3 Class B                   $98,684,250.00       13.1579%
</TABLE>

14.  Total Available Credit Enhancement Amounts
     ------------------------------------------

<TABLE>
<CAPTION>
                                               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

15.  Delinquency Summary
     -------------------

<TABLE>
<CAPTION>
     End of Due Period Master Trust Receivables Outstanding          $24,021,453,838.82

                        Delinquent Amount         Percentage of Ending
     Payment Status      Ending Balance          Receivables Outstanding

<S>                   <C>                             <C>  
     30-59 days           $651,395,072.25                 2.71%

     60-179 days        $1,134,774,887.95                 4.72%
</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 October 15, 1998:


<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                                                               $3,691,232,046.31

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                 $103,746,284.45

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                           $12,896,648.22

 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                                         $3,571,775.00
</TABLE>

<PAGE>   6


<TABLE>
<S>                                                                                   <C>              
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                                   $5,581,287.45

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                              $693,807.02

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                                           $193,417.34

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 15th day of October, 1998.


                           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


<TABLE>
<S>                                            <C>  
Trust Distribution Date: October 15, 1998      Due Period Ending:  September 30, 1998
</TABLE>

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:

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

<TABLE>
<CAPTION>
     Series  1998-4                                 Total         Interest        Principal
<S>                   <C>                       <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>

2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------

<TABLE>
<S>                                                     <C>               
  (a) Aggregate Investor Interest                       $17,987,972,342.65
      Seller Interest                                    $5,650,197,368.71

      Total Master Trust                                $23,638,169,711.36


  (b) Group One Investor Interest                       $15,437,972,342.65

  (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>

3.   Allocation of Receivables Collected During the Due Period
     ---------------------------------------------------------

<TABLE>
<CAPTION>
                                                               Finance Charge         Principal           Yield
                                                                Collections          Collections       Collections

  (a) Allocation of Collections between Investor and Seller

<S>                                                           <C>                 <C>                     <C>  
      Aggregate Investor Allocation                           $311,805,039.20     $2,508,296,244.18       $0.00

      Seller                                                   $96,316,739.86       $774,814,023.07       $0.00

  (b) Group One Allocation                                    $267,891,135.76     $2,155,033,579.41       $0.00

  (c) Group Two Allocation                                     $43,913,903.44       $353,262,664.77       $0.00

  (d) Series 1998-4 Allocations                                 $9,060,303.50        $72,885,047.93       $0.00

  (e) Class A Allocations                                       $8,611,369.54        $69,273,626.64       $0.00

      Class B Allocations                                         $448,933.96         $3,611,421.29       $0.00
</TABLE>


<PAGE>   2


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

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

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

<S>                                         <C>                      <C>  
     Series 1998-4                          $2,525,220.33            $0.00
</TABLE>

7.   Pool Factors
     ------------
<TABLE>
<CAPTION>
                                                            This Due Period

<S>                                                           <C>       
     Class A                                                  1.00000000

     Class B                                                  1.00000000
</TABLE>

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

<S>                                      <C>                        <C>  
  (a) Group One                          $113,570,252.31            $0.00

  (b) Group Two                           $18,616,939.60            $0.00

  (c) Series 1998-4                        $3,841,041.44            $0.00

  (d) Class A                              $3,650,719.57            $0.00

      Class B                                $190,321.87            $0.00
</TABLE>

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

12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
     -------------------------------------------------------------------

<TABLE>
<S>                                                       <C>           
  (a) Group One                                           $25,945,231.67

  (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>

13.  Class Available Subordinated Amount at the end of the Due Period
     ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                              As a Percentage
                                                                of Class A
                                                  Total       Invested Amount

<S>                                          <C>                  <C>    
     Series 1998-4 Class B                   $44,736,860.00       8.9474%
</TABLE>

14.  Total Available Credit Enhancement Amounts
     ------------------------------------------

<TABLE>
<CAPTION>
                                                 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

15.  Delinquency Summary
     -------------------

<TABLE>
<CAPTION>
     End of Due Period Master Trust Receivables Outstanding           $24,021,453,838.82

                          Delinquent Amount      Percentage of Ending
     Payment Status        Ending Balance       Receivables Outstanding

<S>                    <C>                            <C>  
     30-59 days           $651,395,072.25                2.71%

     60-179 days        $1,134,774,887.95                4.72%
</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 October 15, 1998:


<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                                                               $3,691,232,046.31

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                  $69,273,626.64

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                            $8,611,369.54

 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                                        $14,854,166.65
</TABLE>


<PAGE>   6


<TABLE>
<S>                                                                                   <C>              
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                                   $3,611,421.29

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                              $448,933.96

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                                           $802,199.40

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 15th day of October, 1998.



                           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


<TABLE>
<S>                                            <C> 
Trust Distribution Date: October 15, 1998      Due Period Ending:  September 30, 1998
</TABLE>

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:

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

<TABLE>
<CAPTION>
  Series  1998-6                                    Total         Interest        Principal
<S>                   <C>                       <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>

2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------

<TABLE>
<S>                                                     <C>               
  (a) Aggregate Investor Interest                       $17,987,972,342.65
      Seller Interest                                    $5,650,197,368.71

      Total Master Trust                                $23,638,169,711.36


  (b) Group One Investor Interest                       $15,437,972,342.65

  (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>

3.   Allocation of Receivables Collected During the Due Period
     ---------------------------------------------------------

<TABLE>
<CAPTION>
                                                               Finance Charge          Principal          Yield
                                                                Collections           Collections      Collections

  (a) Allocation of Collections between Investor and Seller

<S>                                                            <C>                 <C>                    <C>  
      Aggregate Investor Allocation                            $311,805,039.20     $2,508,296,244.18      $0.00

      Seller                                                    $96,316,739.86       $774,814,023.07      $0.00

  (b) Group One Allocation                                     $267,891,135.76     $2,155,033,579.41      $0.00

  (c) Group Two Allocation                                      $43,913,903.44       $353,262,664.77      $0.00

  (d) Series 1998-6 Allocations                                  $9,060,303.50        $72,885,047.93      $0.00

  (e) Class A Allocations                                        $8,611,369.54        $69,273,626.64      $0.00

      Class B Allocations                                          $448,933.96         $3,611,421.29      $0.00
</TABLE>


<PAGE>   2


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

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

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

<S>                                        <C>                  <C>          
     Series 1998-6                         $2,570,176.50        $6,425,441.25
</TABLE>

7.   Pool Factors
     ------------
<TABLE>
<CAPTION>
                                                           This Due Period

<S>                                                          <C>       
     Class A                                                 1.00000000

     Class B                                                 1.00000000
</TABLE>

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

<S>                                      <C>                        <C>  
  (a) Group One                          $113,570,252.31            $0.00

  (b) Group Two                           $18,616,939.60            $0.00

  (c) Series 1998-6                        $3,841,041.44            $0.00

  (d) Class A                              $3,650,719.57            $0.00

      Class B                                $190,321.87            $0.00
</TABLE>

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

12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
     -------------------------------------------------------------------

<TABLE>
<S>                                                       <C>           
  (a) Group One                                           $25,945,231.67

  (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>

13.  Class Available Subordinated Amount at the end of the Due Period
     ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                               As a Percentage
                                                                  of Class A
                                                 Total         Invested Amount

<S>                                          <C>                    <C>    
     Series 1998-6 Class B                   $44,736,860.00         8.9474%
</TABLE>

14.  Total Available Credit Enhancement Amounts
     ------------------------------------------

<TABLE>
<CAPTION>
                                              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

15.  Delinquency Summary
     -------------------

<TABLE>
<CAPTION>
     End of Due Period Master Trust Receivables Outstanding           $24,021,453,838.82

                        Delinquent Amount      Percentage of Ending
     Payment Status       Ending Balance      Receivables Outstanding

<S>                    <C>                         <C>  
     30-59 days           $651,395,072.25             2.71%

     60-179 days        $1,134,774,887.95             4.72%
</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 October 15, 1998:


<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                                                               $3,691,232,046.31

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                  $69,273,626.64

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                            $8,611,369.54

 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                                                   $3,611,421.29

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                              $448,933.96

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 15th day of October, 1998.



                           GREENWOOD TRUST COMPANY
                           as Master Servicer

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



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