CITIBANK SOUTH DAKOTA N A
424B5, 1997-02-14
ASSET-BACKED SECURITIES
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<PAGE>

                                                             RULE NO. 424(b)(5)
                                                      REGISTRATION NO. 33-99328
 
          PROSPECTUS SUPPLEMENT TO PROSPECTUS DATED JANUARY 21, 1997
                      CITIBANK CREDIT CARD MASTER TRUST I
  $750,000,000 FLOATING RATE CLASS A CREDIT CARD PARTICIPATION CERTIFICATES,
                                 SERIES 1997-4
   $48,000,000 FLOATING RATE CLASS B CREDIT CARD PARTICIPATION CERTIFICATES,
                                 SERIES 1997-4
                         CITIBANK (SOUTH DAKOTA), N.A.
                              SELLER AND SERVICER
                    CITIBANK (NEVADA), NATIONAL ASSOCIATION
                                    SELLER
 
                               ---------------
 
  The Floating Rate Class A Credit Card Participation Certificates, Series
1997-4 (the "Class A Certificates") and the Floating Rate Class B Credit Card
Participation Certificates, Series 1997-4 (the "Class B Certificates"; the
Class A Certificates and the Class B Certificates are collectively referred to
herein as the "Investor Certificates") offered hereby evidence undivided
interests in certain assets of Citibank Credit Card Master Trust I (the
"Trust") created by Citibank (South Dakota), N.A. ("Citibank (South Dakota)")
and Citibank (Nevada), National Association ("Citibank (Nevada)"), as sellers
(collectively, the "Banks"). The Trust assets include receivables (the
"Receivables") generated from time to time in a portfolio of revolving credit
card accounts and collections thereon. The fractional undivided interest in
the Trust represented by the Class B Certificates will be subordinated to the
Class A Certificates to the extent described herein. Following the completion
of the offering made hereby, additional Series 1997-4 Investor Certificates
may be issued from time to time if certain conditions have been met. See
"Supplemental Series Provisions--Issuance of Additional Investor Certificates"
in this Prospectus Supplement. The Trust previously has issued thirty-three
other series of investor certificates which evidence undivided interests in
the Trust which are still outstanding; additional series of investor
certificates are expected to be issued from time to time by the Trust.
 
                               ---------------
                                                       (Continued on next page)
 
 THE INVESTOR CERTIFICATES  REPRESENT BENEFICIAL INTERESTS IN  THE TRUST ONLY
  AND DO NOT REPRESENT INTERESTS IN OR  OBLIGATIONS OF THE BANKS OR CITICORP
   OR ANY  AFFILIATE  THEREOF. NEITHER  THE INVESTOR  CERTIFICATES  NOR THE
    UNDERLYING ACCOUNTS  OR RECEIVABLES ARE  INSURED OR GUARANTEED  BY THE
     UNITED STATES GOVERNMENT, THE  FEDERAL DEPOSIT INSURANCE CORPORATION
      OR ANY OTHER GOVERNMENTAL AGENCY OR INSTRUMENTALITY.
 
 THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
  EXCHANGE  COMMISSION  OR  ANY  STATE SECURITIES  COMMISSION  NOR  HAS  THE
    SECURITIES AND EXCHANGE COMMISSION  OR ANY STATE SECURITIES COMMISSION
     PASSED UPON  THE ACCURACY OR ADEQUACY OF THIS  PROSPECTUS SUPPLEMENT
       OR  THE PROSPECTUS.  ANY  REPRESENTATION TO  THE  CONTRARY IS  A
        CRIMINAL OFFENSE.
 
<TABLE>
<CAPTION>
                                  INITIAL PUBLIC   UNDERWRITING   PROCEEDS TO
                                 OFFERING PRICE(1)   DISCOUNT   THE BANKS(1)(2)
                                 ----------------- ------------ ---------------
<S>                              <C>               <C>          <C>
Per Class A Certificate........      99.95603%         .45%        99.50603%
Per Class B Certificate........      99.91292%        .475%        99.43792%
Total..........................    $797,628,427     $3,603,000   $794,025,427
</TABLE>
- -------
(1) Plus accrued interest, if any, from February 20, 1997.
(2) Before deducting expenses payable by the Banks, estimated to be $400,000.
 
                               ---------------
 
  The Class A Certificates and the Class B Certificates are offered subject to
receipt and acceptance by the Class A Underwriters and the Class B
Underwriters, respectively, and to their right to reject any order in whole or
in part and to withdraw, cancel or modify the offer without notice. It is
expected that delivery of the Investor Certificates will be made in book-entry
form through the facilities of The Depository Trust Company ("DTC"), Cedel
Bank, societe anonyme ("Cedel") and the Euroclear System ("Euroclear") on or
about February 20, 1997.
 
                               ---------------
 
                   Underwriters of the Class A Certificates
GOLDMAN, SACHS & CO.
                       CITIBANK
                                  CREDIT SUISSE FIRST BOSTON
                                                           SALOMON BROTHERS INC
 
                   Underwriters of the Class B Certificates
CITIBANK                                                   GOLDMAN, SACHS & CO.
 
                               ---------------
 
          The date of this Prospectus Supplement is February 12, 1997
<PAGE>
 
(Continued from previous page)
 
  Interest with respect to the Investor Certificates will accrue from February
20, 1997 and will be payable quarterly on or about the tenth day of March,
June, September and December, commencing June 10, 1997, and on the related
maturity date or, under certain limited circumstances described herein,
monthly on or about the tenth day of each month. The principal of the Class A
Certificates and the Class B Certificates is scheduled to be paid on the March
2009 Distribution Date, but principal with respect to the Class A Certificates
and the Class B Certificates may be paid earlier or later under certain
limited circumstances described herein. Except under certain limited
circumstances described herein, principal payments will not be made to Class B
Certificateholders until the final principal payment has been made in respect
of the Class A Certificates. See "Summary of Series Terms--Class A
Certificates" and "--Class B Certificates" in this Prospectus Supplement.
 
  The Trust will have the benefit of two interest swap agreements for the
exclusive benefit of the Class A Certificateholders (the "Class A Interest
Rate Swaps") and two interest rate swap agreements for the exclusive benefit
of the Class B Certificateholders (the "Class B Interest Rate Swaps", and
together with the Class A Interest Rate Swaps, the "Interest Rate Swaps").
Citibank (South Dakota) and Citibank (Nevada) will be the counterparties to
the respective Interest Rate Swaps. Payments received by the Trust pursuant to
the Class A Interest Rate Swaps will be available to pay interest due on the
Class A Certificates on each Class A Interest Payment Date and payments
received by the Trust pursuant to the Class B Interest Rate Swaps will be
available to pay interest due on the Class B Certificates on each Class B
Interest Payment Date. The Trust will also have the benefit of funds on
deposit in a Cash Collateral Account. The Cash Collateral Account will be
funded by an initial deposit of $55,860,000, of which $39,900,000 will be for
the benefit of both the Class A Certificates and the Class B Certificates and
$15,960,000 will be for the exclusive benefit of the Class B Certificates.
Amounts available to be withdrawn from the Cash Collateral Account will be
applied as described under "Summary of Series Terms--Credit Enhancement" in
this Prospectus Supplement and "Series Provisions--Series Enhancements" in the
Prospectus. Additional credit enhancement will be provided in the event that
additional Series 1997-4 Investor Certificates are issued. See "Supplemental
Series Provisions--Issuance of Additional Investor Certificates" in this
Prospectus Supplement.
 
  Application will be made to list the Investor Certificates on the Luxembourg
Stock Exchange.
 
  POTENTIAL INVESTORS SHOULD CONSIDER, AMONG OTHER THINGS, THE DISCUSSION
UNDER "SPECIAL CONSIDERATIONS" THAT BEGINS ON PAGE 13 OF THE PROSPECTUS.
 
                               ----------------
 
  IN CONNECTION WITH THIS OFFERING, THE UNDERWRITERS MAY OVER-ALLOT OR EFFECT
TRANSACTIONS IN THE UNITED STATES WHICH STABILIZE OR MAINTAIN THE MARKET PRICE
OF THE INVESTOR CERTIFICATES OFFERED HEREBY AT A LEVEL ABOVE THAT WHICH MIGHT
OTHERWISE PREVAIL IN THE OPEN MARKET. SUCH STABILIZING, IF COMMENCED, MAY BE
DISCONTINUED AT ANY TIME.
 
                               ----------------
 
  This Prospectus Supplement does not contain complete information about the
offering of the Investor Certificates. Additional information is contained in
the Prospectus and purchasers are urged to read both this Prospectus
Supplement and the Prospectus in full. Sales of the Investor Certificates may
not be consummated unless the purchaser has received both this Prospectus
Supplement and the Prospectus.
 
  This Prospectus Supplement and the Prospectus may be used by Citicorp
Securities, Inc., Citibank International plc and Citibank, N.A., affiliates of
the Banks and wholly owned subsidiaries of Citicorp, in connection with offers
and sales related to market-making transactions in the Investor Certificates.
Citicorp Securities, Inc., Citibank International plc or Citibank, N.A. may
act as principal or agent in such transactions. Such sales will be made at
prices related to prevailing market prices at the time of sale.
 
                                      S-2
<PAGE>
 
 
                            SUMMARY OF SERIES TERMS
 
  This Summary of Series Terms (the "Summary of Terms") sets forth and defines
specific terms of the Investor Certificates offered by this Prospectus
Supplement and the Prospectus. The Summary of Terms is qualified in its
entirety by reference to the detailed information appearing elsewhere in this
Prospectus Supplement and in the Prospectus. Reference is made to the Glossary
Supplement at the end of this Prospectus Supplement and to the Glossary at the
end of the Prospectus for the location in this Prospectus Supplement and the
Prospectus of the definitions of certain capitalized terms used herein and
therein.
 
Title of Securities           $750,000,000 Floating Rate Class A Credit
Offered.....................   Card Participation Certificates, Series
                               1997-4.
                              $48,000,000 Floating Rate Class B Credit Card
                               Participation Certificates, Series 1997-4.
 
Class A Certificates
 Class A Certificate Rate...  For each Interest Period, a per annum rate
                               equal to the arithmetic mean of London
                               interbank offered quotations for U.S. dollar
                               deposits ("LIBOR") for a period of three
                               months, plus .115%, calculated on the basis
                               of the actual number of days in the year
                               divided by a 360-day year. LIBOR will be
                               determined as of the applicable LIBOR
                               Determination Date as described herein. See
                               "Supplemental Series Provisions--
                               Determination of LIBOR".
 
 Class A Interest Payment     The tenth day of each March, June, September
Dates.......................   and December (or, if such day is not a
                               business day, the next succeeding business
                               day), commencing June 10, 1997.
 
 Class A Controlled
Amortization   Amount.......
                              $68,181,818 or, if the Servicer elects to
                               postpone the commencement of the
                               Accumulation Period, an amount sufficient so
                               that the aggregate of the Class A Controlled
                               Amortization Amounts for each Distribution
                               Date during the Accumulation Period equals
                               the Class A Invested Amount as of the Class
                               A Expected Final Payment Date. See
                               "Supplemental Series Provisions--
                               Postponement of Accumulation Period" in this
                               Prospectus Supplement.
 
 Class A Expected Final
Payment   Date..............
                              The March 2009 Distribution Date.
 
 Class A Investment Fee.....  $1,085,105.
 
 Class A Enhancement........  On each Distribution Date, the Available
                               Shared Enhancement Amount will be available
                               to fund certain amounts with respect to both
                               the Class A Certificates and the Class B
                               Certificates. See "Credit Enhancement" in
                               this Summary of Terms and "Series
                               Provisions--Series Enhancements" in the
                               Prospectus.
 
                                      S-3
<PAGE>
 
 
                              Collections of Principal Receivables and
                               related amounts (excluding collections of
                               Finance Charge Receivables) otherwise
                               allocable to the Class B Certificateholders
                               will be subordinated to the payment of
                               amounts due with respect to the Class A
                               Certificates and in order to maintain the
                               Class A Certificateholders' interest in the
                               Trust. No principal will be payable on the
                               Class B Certificates until the final
                               principal payment has been made on the Class
                               A Certificates, except that, on the first
                               Special Payment Date following an Economic
                               Early Amortization Event, a portion of the
                               Available Enhancement Amount will be used to
                               pay principal of the Class B Certificates.
                               See "Series Provisions--Allocations,
                               Reallocations and Subordination" in the
                               Prospectus.
 
 Initial Shared Enhancement
   Amount...................
                              $39,900,000.
 
 Class A Interest Rate        On the Series Issuance Date, the Trustee, for
   Swaps....................   the exclusive benefit of the Class A
                               Certificateholders, will enter into the
                               Class A Interest Rate Swaps with the Swap
                               Counterparties. The Class A Interest Rate
                               Swaps together will have a combined notional
                               amount (the "Class A Notional Amount") as of
                               any Swap Payment Date equal to the
                               outstanding principal amount of the Class A
                               Certificates as of the close of business on
                               the preceding Distribution Date; provided,
                               however, with respect to the first Swap
                               Payment Date, the Class A Notional Amount
                               will be equal to the initial principal
                               amount of the Class A Certificates. Citibank
                               (South Dakota) and Citibank (Nevada) will
                               severally (and not jointly) enter into the
                               Class A Interest Rate Swaps for
                               approximately 36.26% and 63.74%,
                               respectively, of the Class A Notional
                               Amount. Pursuant to the Class A Interest
                               Rate Swaps, on the business day preceding
                               each Distribution Date (each, a "Swap
                               Payment Date") payment will be made by the
                               Trust to the Swap Counterparties (if the
                               following is a positive number) or by the
                               Swap Counterparties to the Trust (if the
                               following is a negative number) of an amount
                               in the aggregate equal to (i) one twelfth of
                               the product of (A) the Class A Notional
                               Amount and (B) 6.8064% (the "Class A Swap
                               Rate") (or, with respect to the first Swap
                               Payment Date, an amount specified in the
                               Series Supplement) minus (ii) the product of
                               (A) a fraction, the numerator of which is
                               the actual number of days from and including
                               the prior Distribution Date to but excluding
                               the related Distribution Date (or, with
                               respect to the first Swap Payment Date, the
                               actual number of days from and including the
                               Series Issuance Date to but excluding the
                               first Distribution Date) and the denominator
                               of which is 360, (B) the Class A Notional
                               Amount and (C) the Class A Certificate Rate.
                               If
 
                                      S-4
<PAGE>
 
                               such amount is positive, it will be referred
                               to herein as the "Class A Net Swap Payment",
                               and if such amount is negative, it will be
                               referred to herein as the "Class A Net Swap
                               Receipt".
 
                              Any Class A Net Swap Receipt in respect of a
                               Swap Payment Date will be deposited in the
                               Class A Interest Funding Account and will be
                               available to make distributions of interest
                               due on the Class A Certificates on the next
                               Class A Interest Payment Date. Any Class A
                               Net Swap Payment in respect of a Swap
                               Payment Date will be paid out of funds on
                               deposit in the Collection Account.
 
                              With the prior approval of the Rating Agency,
                               the Servicer may terminate the Class A
                               Interest Rate Swaps, without any liability
                               of the Trust to the Swap Counterparties and
                               without any obligation to obtain a
                               replacement interest rate swap. If the Class
                               A Interest Rate Swaps are so terminated,
                               Class A Certificateholders will only be
                               entitled to look to the assets of the Trust
                               then available to such Class for payments of
                               interest. See "Supplemental Series
                               Provisions--The Interest Rate Swaps" in this
                               Prospectus Supplement.
 
 Swap Counterparties........  Citibank (South Dakota), N.A. and Citibank
                               (Nevada), National Association (together, in
                               such capacities, the "Swap Counterparties").
                               See "Supplemental Series Provisions--The
                               Swap Counterparties" in this Prospectus
                               Supplement.
 
 Class A ERISA                Class A Certificates may be eligible for
Eligibility.................   purchase by Benefit Plans. See "ERISA
                               Considerations" in the Prospectus.
 
 Class A Ratings............  It is a condition to the issuance of the
                               Class A Certificates that they be rated in
                               the highest rating category by at least one
                               nationally recognized rating agency. The
                               rating of the Class A Certificates is based
                               primarily on the value of the Receivables,
                               the extent of the Initial Shared Enhancement
                               Amount, the circumstances in which funds may
                               be withdrawn from the Cash Collateral
                               Account for the benefit of the Investor
                               Certificateholders, the terms of the Class B
                               Certificates and the Interest Rate Swaps and
                               the credit ratings of the Swap
                               Counterparties. See "Special
                               Considerations--Series Considerations--
                               Ratings of the Investor Certificates" in the
                               Prospectus.
 
Class B Certificates
 Class B Certificate Rate...  For each Interest Period, a per annum rate
                               equal to LIBOR for a period of three months,
                               plus .29%, calculated on the basis of the
                               actual number of days in the year divided by
                               a 360-day year. LIBOR will be determined as
                               of the applicable LIBOR Determination Date
                               as described herein. See "Supplemental
                               Series Provisions--Determination of LIBOR".
 
                                      S-5
<PAGE>
 
 
 Class B Interest Payment     The tenth day of each March, June, September
Dates.......................   and December (or, if such day is not a
                               business day, the next succeeding business
                               day), commencing June 10, 1997.
 
 Class B Expected Final
Payment   Date..............
                              The March 2009 Distribution Date.
 
 Class B Enhancement........  On each Distribution Date, the Available
                               Shared Enhancement Amount (after giving
                               effect to the application thereof, if
                               necessary, to fund the Required Amount) will
                               be available to fund certain amounts with
                               respect to the Class B Certificates. The
                               Initial Class B Enhancement Amount will be
                               for the exclusive benefit of the Class B
                               Certificateholders. See "Credit Enhancement"
                               in this Summary of Terms and "Series
                               Provisions--Series Enhancements" in the
                               Prospectus.
 Initial Shared Enhancement
  Amount....................
                              $39,900,000.
 
 Initial Class B
Enhancement   Amount........
                              $15,960,000.
 
 Class B Interest Rate        On the Series Issuance Date, the Trustee, for
   Swaps....................   the exclusive benefit of the Class B
                               Certificateholders, will enter into the
                               Class B Interest Rate Swaps with the Swap
                               Counterparties. The Class B Interest Rate
                               Swaps together will have a combined notional
                               amount (the "Class B Notional Amount") as of
                               any Swap Payment Date equal to the Class B
                               Invested Amount as of the close of business
                               on the preceding Distribution Date;
                               provided, however, with respect to the first
                               Swap Payment Date, the Class B Notional
                               Amount will be equal to the initial
                               principal amount of the Class B
                               Certificates. Citibank (South Dakota) and
                               Citibank (Nevada) will severally (and not
                               jointly) enter into the Class B Interest
                               Rate Swaps for approximately 36.26% and
                               63.74%, respectively, of the Class B
                               Notional Amount. Pursuant to the Class B
                               Interest Rate Swaps, on each Swap Payment
                               Date payment will be made by the Trust to
                               the Swap Counterparties (if the following is
                               a positive number) or by the Swap
                               Counterparties to the Trust (if the
                               following is a negative number) of an amount
                               in the aggregate equal to (i) one twelfth of
                               the product of (A) the Class B Notional
                               Amount and (B) 6.9839% (the "Class B Swap
                               Rate") (or, with respect to the first Swap
                               Payment Date, an amount specified in the
                               Series Supplement) minus (ii) the product of
                               (A) a fraction, the numerator of which is
                               the actual number of days from and including
                               the prior Distribution Date to but excluding
                               the related Distribution Date (or, with
                               respect to the first Swap Payment Date, the
                               actual number of days from and including the
                               Series Issuance Date to but excluding the
                               first Distribution Date) and the denominator
                               of which is 360, (B) the Class B Notional
                               Amount and (C) the Class B Certificate Rate.
                               If
 
                                      S-6
<PAGE>
 
                               such amount is positive, it will be referred
                               to herein as the "Class B Net Swap Payment",
                               and if such amount is negative, it will be
                               referred to herein as the "Class B Net Swap
                               Receipt".
 
                              Any Class B Net Swap Receipt in respect of a
                               Swap Payment Date will be deposited in the
                               Class B Interest Funding Account and will be
                               available to make distributions of interest
                               due on the Class B Certificates on the next
                               Class B Interest Payment Date. Any Class B
                               Net Swap Payment in respect of a Swap
                               Payment Date will be paid out of funds on
                               deposit in the Collection Account.
 
                              With the prior approval of the Rating Agency
                               and provided the Servicer has terminated the
                               Class A Interest Rate Swaps with the prior
                               approval of the Rating Agency, the Servicer
                               may terminate the Class B Interest Rate
                               Swaps, without any liability of the Trust to
                               the Swap Counterparties and without any
                               obligation to obtain a replacement interest
                               rate swap. If the Class B Interest Rate
                               Swaps are so terminated, Class B
                               Certificateholders will only be entitled to
                               look to the assets of the Trust then
                               available to such Class for payments of
                               interest. See "Supplemental Series
                               Provisions--The Interest Rate Swaps" in this
                               Prospectus Supplement.
 
 Class B ERISA                Class B Certificates are not expected to be
Eligibility.................   eligible for purchase by Benefit Plans. See
                               "ERISA Considerations" in the Prospectus.
 
 Class B Ratings............  It is a condition to the issuance of the
                               Class B Certificates that they be rated at
                               least "A" or its equivalent by at least one
                               nationally recognized rating agency. The
                               rating of the Class B Certificates is based
                               primarily on the value of the Receivables,
                               the extent of the Initial Cash Collateral
                               Amount, the circumstances in which funds may
                               be withdrawn from the Cash Collateral
                               Account for the benefit of the Investor
                               Certificateholders, the terms of the
                               Interest Rate Swaps and the credit ratings
                               of the Servicer, the Banks and the Swap
                               Counterparties. See "Special
                               Considerations--Series Considerations--
                               Ratings of the Investor Certificates" in the
                               Prospectus.
 
Distribution Date...........  The tenth day of each month (or, if such day
                               is not a business day, the next succeeding
                               business day), commencing March 10, 1997.
 
Credit Enhancement..........  A cash collateral account (the "Cash
                               Collateral Account") will be established in
                               the name of the Trustee, for the benefit of
                               the Investor Certificateholders. The Cash
                               Collateral Account will be funded on the
                               Series Issuance Date in the amount of
                               $55,860,000 (the "Initial Cash Collateral
                               Amount"). Of the Initial Cash Collateral
                               Amount, $39,900,000 (the "Initial Shared
                               Enhancement Amount") will be for the benefit
                               of both the Class A Certificates and the
                               Class B Certificates
 
                                      S-7
<PAGE>
 
                               and the remaining $15,960,000 of the Initial
                               Cash Collateral Amount (the "Initial Class B
                               Enhancement Amount") will be for the
                               exclusive benefit of the Class B
                               Certificates. See "Series Provisions--Series
                               Enhancements" in the Prospectus. Additional
                               credit enhancement will be provided in the
                               event of an Additional Issuance.
 
                              For each Distribution Date, the Available
                               Shared Enhancement Amount will be applied to
                               fund the following amounts in the following
                               priority: (a) with respect to the Class A
                               Certificates, the excess, if any, of the
                               Required Amount with respect to such
                               Distribution Date over the amount of Excess
                               Finance Charge Collections allocated and
                               available to fund such Required Amount and
                               (b) with respect to the Class B
                               Certificates, (i) the excess, if any, of the
                               accrued and unpaid interest on the
                               outstanding principal balance of the Class B
                               Certificates (plus any interest payable on
                               such unpaid interest) and the payments due
                               to the Swap Counterparties pursuant to the
                               Class B Interest Rate Swaps over the amount
                               to be deposited in the Class B Interest
                               Funding Account and the amount to be paid to
                               the Swap Counterparties for such
                               Distribution Date and (ii) the excess, if
                               any, of the Class B Investor Default Amount
                               for such Distribution Date over the amount
                               of Excess Finance Charge Collections
                               allocated and available to fund such Class B
                               Investor Default Amount.
 
                              On the first Special Payment Date following
                               an Economic Early Amortization Event, the
                               Available Shared Enhancement Amount (after
                               giving effect to other withdrawals from the
                               Cash Collateral Account on such Distribution
                               Date) will be applied to pay principal of
                               the Class A Certificates and the remainder
                               of the Available Cash Collateral Amount will
                               be applied to pay principal of the Class B
                               Certificates. Following such withdrawals
                               from the Cash Collateral Account on such
                               Special Payment Date, the Cash Collateral
                               Account will be terminated and no further
                               deposits to, or withdrawals from, the Cash
                               Collateral Account will be made for the
                               benefit of the Investor Certificateholders.
 
                              On each Distribution Date commencing with the
                               Class B Principal Commencement Date,
                               provided that an Economic Early Amortization
                               Event has not occurred, the Available Cash
                               Collateral Amount (after giving effect to
                               other withdrawals from the Cash Collateral
                               Account on such Distribution Date) will be
                               applied to pay principal of the Class B
                               Certificates to the extent that the unpaid
                               principal amount of the Class B Certificates
                               exceeds the Class B Invested Amount. See
                               "Series Provisions--Series Enhancements--
                               Credit Enhancement Generally" and "--The
                               Cash Collateral Account" in the Prospectus.
 
 
                                      S-8
<PAGE>
 
Issuance of Additional
 Investor Certificates......
                              After the completion of the offering made
                               hereby, the Banks may cause the Trustee to
                               issue additional Series 1997-4 Investor
                               Certificates ("Additional Investor
                               Certificates") from time to time during the
                               Revolving Period, provided that certain
                               conditions included in the Supplement
                               relating to the Series 1997-4 Certificates
                               (the "Series Supplement") are met. In
                               connection with each Additional Issuance,
                               the outstanding principal amounts of the
                               Class A Certificates and the Class B
                               Certificates and the aggregate amount of
                               Series Enhancement will all be increased pro
                               rata. When issued, the Additional Investor
                               Certificates of each class will be identical
                               in all respects to the other outstanding
                               Investor Certificates of that class. See
                               "Supplemental Series Provisions--Issuance of
                               Additional Investor Certificates" in this
                               Prospectus Supplement.
 
Previously Issued Series....  Thirty-three Series of investor certificates
                               in Group One previously issued by the Trust
                               are still outstanding. See "Annex I: Prior
                               Issuances of Investor Certificates" in this
                               Prospectus Supplement for a summary of the
                               outstanding Series of investor certificates
                               previously issued by the Trust.
 
Participation with Other      The Investor Certificates are expected to be
Series......................   the thirty-fourth Series issued by the
                               Trust, outstanding as of the Series Issuance
                               Date, in a group of Series ("Group One")
                               issued from time to time by the Trust.
                               Collections of Finance Charge Receivables
                               allocable to each Series in Group One will
                               be aggregated and made available for
                               required payments for all Series in Group
                               One. Consequently, the issuance of a new
                               Series in Group One may have the effect of
                               reducing or increasing the amount of
                               collections of Finance Charge Receivables
                               allocable to the Investor Certificates. See
                               "Series Provisions--Allocations,
                               Reallocations and Subordination--
                               Reallocations Among Investor Certificates of
                               Different Series" in the Prospectus.
 
The Receivables.............  The aggregate amount of Receivables in the
                               Accounts included in the Trust as of January
                               5, 1997 was $33,051,162,565, of which
                               $32,633,125,361 were Principal Receivables
                               and $418,037,204 were Finance Charge
                               Receivables (which amounts include overdue
                               Principal Receivables and overdue Finance
                               Charge Receivables).
 
Series Cut-Off Date.........  January 28, 1997.
 
Series Issuance Date........  February 20, 1997.
 
Revolving Period and
Accumulation  Period........
                              Unless an Early Amortization Event has
                               occurred, the Revolving Period will end and
                               the Accumulation Period will
 
                                      S-9
<PAGE>
 
                               commence at the close of business on the
                               fourth-to-last business day of February
                               2008; provided, however, the Servicer may,
                               based on the amount of principal available
                               to the investor certificates of all Series
                               determined based on the principal payment
                               rate on the Receivables and the amount of
                               principal distributable to investor
                               certificateholders of all outstanding Series
                               (excluding certain specified Series),
                               shorten the length of the Accumulation
                               Period and extend by an equivalent period
                               the length of the Revolving Period. See
                               "Supplemental Series Provisions--
                               Postponement of Accumulation Period" in this
                               Prospectus Supplement.
 
Servicing Compensation......  On each Distribution Date, Servicer
                               Interchange with respect to the related Due
                               Period that is on deposit in the Collection
                               Account will be withdrawn from the
                               Collection Account and paid to the Servicer.
                               In addition, the Class A Monthly Servicing
                               Fee, the Class B Monthly Servicing Fee and
                               the Seller Servicing Fee will be paid on
                               each Distribution Date as described under
                               "Series Provisions--Allocations,
                               Reallocations and Subordination--
                               Reallocations Among Investor Certificates of
                               Different Series--Group One Investor Finance
                               Charges" in the Prospectus. See "Series
                               Provisions--Servicing Compensation and
                               Payment of Expenses" in the Prospectus.
 
Servicer Interchange Rate...  1.50% per annum.
 
Net Servicing Fee Rate......  0.37% per annum so long as Citibank (South
                               Dakota) or an affiliate of Citibank (South
                               Dakota) is the Servicer or 0.77% per annum
                               if Citibank (South Dakota) or an affiliate
                               of Citibank (South Dakota) is not the
                               Servicer.
 
Registration, Clearance and
 Settlement.................
                              The Investor Certificates initially will be
                               registered in the name of Cede, as the
                               nominee of DTC, and no purchaser of Investor
                               Certificates will be entitled to receive a
                               Definitive Certificate except under certain
                               limited circumstances. Certificateholders
                               may elect to hold their Investor
                               Certificates through DTC (in the United
                               States) or Cedel or Euroclear (in Europe).
                               Transfers will be made in accordance with
                               the rules and operating procedures described
                               herein.
 
Series Termination Date.....  The March 2011 Distribution Date.
 
                                      S-10
<PAGE>
 
              THE CREDIT CARD BUSINESS OF CITIBANK (SOUTH DAKOTA)
 
GENERAL
 
  Citibank (South Dakota) services the Accounts at its facilities located in
Sioux Falls, South Dakota, and through affiliated credit card processors
pursuant to service contracts. The Receivables conveyed to the Trust to date
were generated under the VISA or MasterCard International programs and were
either originated by Citibank (South Dakota) or purchased by Citibank (South
Dakota) from other credit card issuers. The Accounts are owned by Citibank
(South Dakota) but a participation in the Receivables in certain of these
Accounts has been or will be sold to Citibank (Nevada) prior to their
conveyance to the Trust.
 
  Subject to certain conditions, the Banks may convey to the Trust receivables
arising in credit card accounts of a type not currently included in the
Accounts. Affiliates of the Banks also currently conduct credit card
businesses. For example, Citicorp Retail Services, Inc. manages private label
credit card programs for several retailers. Receivables arising in such
accounts may be participated to the Banks and sold to the Trust. In addition,
the Banks may purchase portfolios of credit card accounts from other credit
card issuers which may be included in the Trust. Such accounts may not be
originated, used or collected in the same manner as the VISA and MasterCard
International accounts described below and may differ with respect to loss and
delinquency and revenue experience and historical payment rates. Such accounts
may also have different terms than the accounts described below, including
lower periodic finance charges. Consequently, the addition of the receivables
arising in such accounts to the Trust could have the effect of reducing the
Portfolio Yield.
 
  The following discussion describes certain terms and characteristics of the
Accounts. The Eligible Accounts from which the Accounts were selected
represent only a portion of the entire portfolio of consumer revolving credit
loans arising in the VISA and MasterCard accounts currently owned by Citibank
(South Dakota) (the "Portfolio"). In addition, Additional Accounts may consist
of Eligible Accounts which are not currently in existence and which are
selected using different eligibility criteria from those used in selecting the
Accounts already included in the Trust.
 
  Citibank (South Dakota) is a member of VISA and MasterCard International.
The VISA and MasterCard credit cards are issued as part of the worldwide VISA
and MasterCard International systems, and transactions creating the
receivables through the use of the credit cards are processed through the VISA
and MasterCard International authorization and settlement systems. Should
either system materially curtail its activities, or should Citibank (South
Dakota) cease to be a member of VISA or MasterCard International, for any
reason, an Early Amortization Event, as such term is defined in the related
Series Supplement, could occur, and delays in payments on the Receivables and
possible reductions in the amounts thereof could also occur. The VISA and
MasterCard accounts, the receivables in which have been conveyed to the Trust,
include both nonpremium and premium VISA and MasterCard accounts. Such
accounts differ with respect to certain characteristics such as annual fees,
periodic finance charges and late fees on amounts charged for goods and
services, as more fully described below. See "The Accounts" in this Prospectus
Supplement.
 
  The VISA and MasterCard credit cards of the type pursuant to which the
Accounts were established may be used to purchase merchandise and services and
to obtain cash advances. A cash advance is made when a credit card account is
used to obtain cash from a financial institution or automated teller machine,
which may be located at a financial institution, supermarket or other business
establishment. Amounts due with respect to both purchases and cash advances
will be included in the Receivables.
 
  The VISA and MasterCard credit card accounts owned by Citibank (South
Dakota) were principally generated through: (i) applications mailed directly
to prospective cardholders; (ii) applications made available to prospective
cardholders at the banking facilities of Citibank (South Dakota), at other
 
                                     S-11
<PAGE>
 
financial institutions and at retail outlets; (iii) applications generated by
advertising on television, on radio and in magazines; (iv) direct mail and
telemarketing solicitation for accounts on a pre-approved credit basis; (v)
solicitation of cardholders of existing nonpremium accounts for premium
accounts; (vi) applications through affinity and co-brand marketing programs;
and (vii) purchases of accounts from other credit card issuers.
 
ACQUISITION AND USE OF CREDIT CARDS
 
  When Citibank (South Dakota) generates new VISA and MasterCard accounts
through the solicitation of individual applications to open an account, it
reviews each application for completeness and creditworthiness. In addition,
Citibank (South Dakota) generally obtains a credit report issued by an
independent credit reporting agency with respect to the applicant. In the
event there are discrepancies between the application and the credit report
and in certain other circumstances, Citibank (South Dakota) may verify certain
of the information regarding the applicant. Citibank (South Dakota) generally
evaluates the ability of an applicant for a VISA or MasterCard credit card
account to repay credit card balances by applying a credit scoring system
using models developed in-house and models developed with the assistance of an
independent firm with extensive experience in developing credit scoring
models. Credit scoring is intended to provide a general indication, based on
the information available, of the applicant's willingness and ability to repay
his or her obligations. Credit scoring evaluates a potential cardholder's
credit profile to arrive at an estimate of the associated credit risk. Models
for credit scoring are developed by using statistics to evaluate common
characteristics and their correlation with credit risk. The credit scoring
model used to evaluate a particular applicant is based on a variety of
factors, including the manner in which the application was made or the manner
in which the account was acquired as well as the type of residence of the
applicant or cardholder. From time to time the credit scoring models used by
Citibank (South Dakota) are reviewed and, if necessary, updated to reflect
more current statistical information. Once an application to open an account
is approved an initial credit limit is established for the account based on,
among other things, the applicant's credit score and the source from which the
account was acquired.
 
  Citibank (South Dakota) also generates new VISA and MasterCard accounts
through direct mail and telemarketing solicitation campaigns directed at
individuals who have been pre-approved by Citibank (South Dakota). Citibank
(South Dakota) identifies potential cardholders for pre-approved direct mail
or telemarketing solicitation campaigns by supplying a list of credit criteria
to a credit bureau which generates a list of individuals who meet such
criteria and forwards such list to a processing vendor. The processing vendor
screens the list in accordance with the credit criteria of Citibank (South
Dakota) to determine the eligibility of the individuals on the list for a pre-
approved solicitation. Individuals qualifying for pre-approved direct mail or
telemarketing solicitation are offered a credit card without having to
complete a detailed application. In the case of pre-approved solicitations, a
predetermined credit limit is reserved for each member of the group being
solicited, which credit limit may be based upon, among other things, each
member's individual credit profile, level of existing and potential
indebtedness relative to assumed income and estimated income and the
availability of additional demographic data for such member.
 
  In recent years, Citibank (South Dakota) has added affinity and co-brand
marketing to its other means of business development. Affinity marketing
involves the solicitation of prospective cardholders from identifiable groups
with a common interest and/or common cause. Affinity marketing is conducted
through two approaches: the first relies on the solicitation of organized
membership groups with the written endorsement of the group's leadership and
the second utilizes direct mail solicitation of prospective cardholders
through the use of a list purchased from a group. Co-brand marketing is an
outgrowth of affinity marketing. It involves the solicitation of customers of
a retailer, service provider or manufacturer which has a recognizable brand
name or logo. Consumers are likely to acquire and use a co-branded card
because of the benefits provided by the co-brander. The co-brander may play a
major role in the marketing and solicitation of co-branded cards. Solicitation
activities used in
 
                                     S-12
<PAGE>
 
connection with affinity and co-brand marketing also include solicitations in
appropriate magazines, telemarketing and applications made available to
prospective cardholders in appropriate locations. In certain cases, pre-
approved solicitations will be used in the same manner as described in the
preceding paragraph.
 
  Credit card accounts that have been purchased by Citibank (South Dakota)
were originally opened using criteria established by the institution from
which the accounts were purchased or by the institution from which the selling
institution originally purchased the accounts. Purchased accounts are screened
against criteria which are set at the time of acquisition to determine whether
any of the purchased accounts should be closed immediately. Any accounts
failing the criteria are closed and no further purchases or cash advances are
authorized. All other such accounts remain open. The credit limits on such
accounts are based initially on the limits established or maintained by the
selling institution. It is expected that portfolios of credit card accounts
purchased by the Banks from other credit card issuers will be added to the
Trust from time to time. It is expected that such accounts will be screened in
the manner described above.
 
  Each cardholder is subject to an agreement governing the terms and
conditions of the accounts. Pursuant to such agreement, Citibank (South
Dakota) reserves the right to change or terminate any terms, conditions,
services or features of the accounts (including increasing or decreasing
periodic finance charges, other charges or minimum payments). Credit limits
may be adjusted periodically based upon an evaluation of the cardholder's
performance.
 
COLLECTION OF DELINQUENT ACCOUNTS
 
  Generally, Citibank (South Dakota) considers a VISA or MasterCard account
delinquent if a minimum payment due thereunder is not received by Citibank
(South Dakota) by the due date indicated on the cardholder's statement.
Efforts to collect delinquent credit card receivables are made by the
personnel of Citibank (South Dakota) and affiliated credit card processors
pursuant to service contracts, supplemented by collection agencies and
attorneys retained by Citibank (South Dakota). Under current practice,
Citibank (South Dakota) includes a request for payment of overdue amounts on
all billing statements issued after the account becomes delinquent. While
collection personnel initiate telephone contact with cardholders whose credit
card accounts have become as little as five days delinquent, based on credit
scoring criteria, generally such contact is initiated when an account is 35
days or more delinquent. In the event that initial telephone contact fails to
resolve the delinquency, Citibank (South Dakota) continues to contact the
cardholder by telephone and by mail. Generally, 15 days after an account
becomes delinquent or whenever a cardholder exceeds such cardholder's credit
limit by more than 5% no additional extensions of credit through such account
are authorized, and no more than 95 days after an account becomes delinquent
it is closed. The Servicer may also, at its discretion, enter into
arrangements with delinquent cardholders to extend or otherwise change payment
schedules. The current policy of the Servicer is to charge-off the receivables
in an account when that account becomes 185 days delinquent or, if the
Servicer receives notice that a cardholder has filed for bankruptcy or has had
a bankruptcy petition filed against it, the Servicer will charge-off the
receivables in such account not later than 60 days after the Servicer receives
such notice. The credit evaluation, servicing and charge-off policies and
collection practices of Citibank (South Dakota) may change over time in
accordance with the business judgment of Citibank (South Dakota), applicable
law and guidelines established by applicable regulatory authorities.
 
                                     S-13
<PAGE>
 
                                 THE ACCOUNTS
 
GENERAL
 
  The Receivables arise in the Accounts. The Accounts have been selected from
substantially all of the Eligible Accounts in the Portfolio. Citibank (South
Dakota) believes that the Accounts are representative of the Eligible Accounts
in the Portfolio and that the inclusion of the Accounts, as a whole, does not
represent an adverse selection from among the Eligible Accounts. The balance
of the Receivables arising from nonpremium and premium accounts as a
percentage of the total Receivable balance of the Accounts, as of January 5,
1997, was approximately 72% and 28%, respectively.
 
  The Accounts include receivables which have been charged-off as
uncollectible prior to their addition to the Trust in accordance with normal
servicing policies. However, for purposes of calculation of the amount of
Principal Receivables and Finance Charge Receivables in the Trust for any
date, the balance of such charged-off receivables is zero and the Trust owns
only the right to receive recoveries with respect to such receivables.
 
  As of January 11, 1991 (the "Trust Cut-Off Date") and any Series Cut-Off
Date, as such term is defined in the prospectus supplement relating to such
Series (and on the date any new Receivables are generated), the Banks have
represented and warranted, and will represent and warrant, to the Trust that
the Receivables (and such new Receivables) meet the eligibility requirements
set forth in the Pooling Agreement. There can be no assurance that all of the
Accounts will continue to meet applicable eligibility requirements throughout
the life of the Trust.
 
  The Accounts consist of Eligible Accounts, which consist of VISA and
MasterCard credit card accounts. The Banks may (subject to certain limitations
and conditions), and, in certain circumstances, will be obligated to,
designate from time to time Additional Accounts and to convey to the Trust all
Receivables of such Additional Accounts, whether such Receivables are then
existing or thereafter created. The Banks have made Lump Sum Additions to the
Trust which, in the aggregate, included approximately $17.55 billion of
Principal Receivables. The Lump Sum Additions consist primarily of receivables
arising from (a) certain premium and nonpremium VISA and MasterCard credit
card accounts which had been previously transferred by the Banks to credit
card trusts originated by the Banks which had reached their maturity dates and
terminated pursuant to their terms and (b) certain other premium and non-
premium VISA and MasterCard credit card accounts.
 
  Additional Accounts may be subject to different eligibility criteria from
those used in selecting the Initial Accounts and may not be accounts of the
same type previously included in the Trust. Therefore there can be no
assurance that such Additional Accounts will be of the same credit quality as
the Initial Accounts or the Additional Accounts, the Receivables in which have
been conveyed previously to the Trust. Moreover, Additional Accounts may
contain Receivables which consist of fees, charges and amounts which are
different from the fees, charges and amounts described below. Such Additional
Accounts may also be subject to different credit limits, balances and ages.
Consequently, there can be no assurance that the Accounts will continue to
have the characteristics described below as Additional Accounts are added. In
addition, the inclusion in the Trust of Additional Accounts with lower
periodic finance charges may have the effect of reducing the Portfolio Yield.
The Banks intend to file with the Securities and Exchange Commission, on
behalf of the Trust, a Current Report on Form 8-K with respect to any addition
of accounts which would have a material effect on the composition of the
Accounts.
 
LOSS AND DELINQUENCY EXPERIENCE
 
  The following tables set forth the loss and delinquency experience with
respect to payments by cardholders for each of the periods shown for the
Accounts. With respect to the Loss Experience table
 
                                     S-14
<PAGE>
 
below, loss experience is shown on a cash basis for Principal Receivables. If
accrued Finance Charge Receivables which have been written off were included
in losses in the following table, Net Losses would be higher as an absolute
number and as a percentage of the average of Principal and Finance Charge
Receivables outstanding during the periods indicated. There can be no
assurance that the loss and delinquency experience for the Receivables in the
future will be similar to the historical experience set forth below with
respect to the Accounts.
 
                      LOSS EXPERIENCE FOR THE ACCOUNTS(1)
                            (DOLLARS IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                              YEAR ENDED DECEMBER 31,
                                        -------------------------------------
                                           1996         1995         1994
                                        -----------  -----------  -----------
<S>                                     <C>          <C>          <C>
Average Principal Receivables
 Outstanding(2)........................ $31,225,337  $25,083,447  $18,066,914
Net Losses(3).......................... $ 1,678,991  $   956,261  $   685,118
Net Losses as a Percentage of Average
 Principal Receivables Outstanding.....        5.38%        3.81%        3.79%
</TABLE>
- --------
(1) Losses consist of write-offs of Principal Receivables.
(2) Average Principal Receivables Outstanding is the average of Principal
    Receivables outstanding during the periods indicated.
(3) Net losses as a percentage of gross charge-offs for the years ended
    December 31, 1996, 1995 and 1994 were 92.46%, 88.49% and 86.14%,
    respectively. Gross charge-offs are charge-offs before recoveries and do
    not include the amount of any reductions in Average Principal Receivables
    Outstanding due to fraud, returned goods, customer disputes or certain
    other miscellaneous write-offs.
 
              DELINQUENCIES AS A PERCENTAGE OF THE ACCOUNTS(1)(2)
                            (DOLLARS IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                     AS OF DECEMBER 31,
                         --------------------------------------------------------------------------
                                   1996                     1995                     1994
                         ------------------------ ------------------------ ------------------------
     NUMBER OF DAYS      DELINQUENT               DELINQUENT               DELINQUENT
       DELINQUENT        AMOUNT(1)  PERCENTAGE(2) AMOUNT(1)  PERCENTAGE(2) AMOUNT(1)  PERCENTAGE(2)
- ------------------------ ---------- ------------- ---------- ------------- ---------- -------------
<S>                      <C>        <C>           <C>        <C>           <C>        <C>
35-64 days.............. $  714,532     2.25%     $  699,878     2.75%     $  439,224     2.40%
65-94 days..............    394,432     1.25         353,832     1.39         228,335     1.25
95 days or more.........    687,988     2.17         558,613     2.20         360,774     1.97
                         ----------     ----      ----------     ----      ----------     ----
   Total................ $1,796,952     5.67%     $1,612,323     6.34%     $1,028,333     5.62%
</TABLE>
- --------
(1) The Delinquent Amount includes both the Principal Receivables and Finance
   Charge Receivables.
(2) The percentages are the result of dividing the Delinquent Amount by the
   average of Principal and Finance Charge Receivables outstanding during the
   periods indicated.
 
                                     S-15
<PAGE>
 
REVENUE EXPERIENCE
 
  The revenues for the Accounts from finance charges, fees paid by cardholders
and interchange for each year of the three-year period ended December 31, 1996
are set forth in the following table.
 
  The revenue experience in the following table is presented on a cash basis
before deduction for charge-offs. Revenues from finance charges, fees and
interchange will be affected by numerous factors, including the periodic
finance charge on the Receivables, the amount of any annual membership fee,
other fees paid by cardholders, the percentage of cardholders who pay off
their balances in full each month and do not incur periodic finance charges on
purchases, the percentage of Accounts bearing finance charges at promotional
rates and changes in the level of delinquencies on the Receivables.
 
                      REVENUE EXPERIENCE FOR THE ACCOUNTS
                            (DOLLARS IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                 YEAR ENDED DECEMBER 31,
                                             ----------------------------------
                                                1996        1995        1994
                                             ----------  ----------  ----------
<S>                                          <C>         <C>         <C>
Finance Charges and Fees Paid (1)........... $5,732,865  $4,545,420  $3,397,756
Average Revenue Yield (2)...................      18.36%      18.11%      18.81%
</TABLE>
- --------
(1) Certain amounts included in Finance Charges and Fees Paid will be treated
    for purposes of the Pooling Agreement as Principal Receivables rather than
    Finance Charge Receivables. These amounts were less than 5% of Finance
    Charges and Fees Paid for each of the periods shown in the table.
(2) Average Revenue Yield is the result of dividing Finance Charges and Fees
    Paid by Average Principal Receivables Outstanding during the periods
    indicated.
 
  The periodic finance charge assessed on most of the premium accounts for
purchases of merchandise and services and cash advances in the Accounts is
lower than the periodic finance charge assessed on most of the nonpremium
accounts for such purchases and advances. The revenues related to periodic
finance charges and fees (other than annual fees) depend in part upon the
collective preference of cardholders to use their credit cards as revolving
debt instruments for purchases and cash advances and to pay off account
balances over several months as opposed to convenience use (where the
cardholders prefer instead to pay off their entire balance each month, thereby
avoiding periodic finance charges on purchases) and upon other services of
which the cardholder chooses to avail himself and which are paid for by the
use of the card. Fees for these other services will be treated for purposes of
the Pooling Agreement and the Series Supplement as Principal Receivables
rather than Finance Charge Receivables; however, the Banks will be permitted
to specify that any such fees will be treated as Finance Charge Receivables.
Revenues related to periodic finance charges and fees also depend on the types
of charges and fees assessed on the Accounts and on whether such Accounts are
nonpremium or premium Accounts. Accordingly, revenues will be affected by
future changes in the types of charges and fees assessed on the Accounts, on
the respective percentages of the Receivables balances of nonpremium and
premium Accounts and in the types of Additional Accounts, the receivables in
which are added to the Trust from time to time. Revenues could be adversely
affected by future changes in fees and charges assessed by Citibank (South
Dakota) and other factors.
 
  Citibank (South Dakota) has previously reduced the finance charges and
reduced or eliminated the annual fees applicable to, and modified some other
terms of, certain of the Accounts. Effective January 1, 1995, Citibank (South
Dakota) eliminated the annual fees applicable to certain other Accounts,
including certain of its affinity and co-branded card products. These changes
have reduced the gross yield of the Accounts. See "The Accounts--Billing and
Payments" in this Prospectus Supplement.
 
                                     S-16
<PAGE>
 
CARDHOLDER MONTHLY PAYMENT RATES FOR THE ACCOUNTS
 
  Monthly payment rates on the Receivables may vary because, among other
things, cardholders may fail to make a required payment, may only make
payments as low as the minimum required payment or may make payments as high
as the entire outstanding balance. Monthly payment rates on the Receivables
may also vary due to seasonal purchasing and payment habits of cardholders.
The following table sets forth the highest and lowest cardholder monthly
payment rates for the Accounts during any month in the periods shown and the
average of the cardholder monthly payment rates for all months during the
periods shown, in each case calculated as a percentage of the total beginning
account balances for such month. Monthly payment rates reflected in the table
include amounts which would be deemed payments of Principal Receivables and
Finance Charge Receivables with respect to the Accounts. In addition, the
amount of outstanding Receivables and the rates of payments, delinquencies,
charge-offs and new borrowings on the Accounts depend on a variety of factors
including seasonal variations, the availability of other sources of credit,
general economic conditions, tax laws, consumer spending and borrowing
patterns and the terms of the Accounts (which are subject to change by
Citibank (South Dakota)).
 
               CARDHOLDER MONTHLY PAYMENT RATES FOR THE ACCOUNTS
 
<TABLE>
<CAPTION>
                                                                 YEAR ENDED
                                                                DECEMBER 31,
                                                            --------------------
                                                             1996   1995   1994
                                                            ------ ------ ------
<S>                                                         <C>    <C>    <C>
Lowest Month............................................... 17.65% 17.59% 18.21%
Highest Month.............................................. 21.05% 20.92% 21.33%
Average of the Months in the Period........................ 19.39% 19.09% 19.69%
</TABLE>
 
  Citibank (South Dakota) has changed certain fees and other terms of certain
Accounts, including a decrease in the required minimum monthly payment.
Citibank (South Dakota) does not expect these changes to have any material
adverse effect on cardholder monthly payment rates for the Accounts. Effective
January 1, 1995, Citibank (South Dakota) eliminated the annual fees applicable
to certain Accounts, including certain of its affinity and co-branded card
products. This change did not have a material adverse effect on cardholder
monthly payment rates for the Accounts. See "The Accounts--Billing and
Payments" in this Prospectus Supplement.
 
INTERCHANGE
 
  Creditors participating in the VISA and MasterCard International
associations receive Interchange as partial compensation for taking credit
risk, absorbing fraud losses and funding receivables for a limited period
prior to initial billing. Under the VISA and MasterCard International systems,
a portion of this Interchange in connection with cardholder charges for
merchandise and services is passed from banks which clear the transactions for
merchants to credit card-issuing banks. Interchange ranges from approximately
1% to 1.85% of the transaction amount. Citibank (South Dakota) is required,
pursuant to the terms of the Pooling Agreement, to transfer to the Trust
Interchange attributed to cardholder charges for merchandise and services in
the Accounts. Interchange is allocated to the Trust on the basis of the
percentage equivalent of the ratio which the amount of cardholder charges for
merchandise and services in the Accounts bears to the total amount of
cardholder charges for merchandise and services in the Portfolio. VISA and
MasterCard International may from time to time change the amount of
Interchange reimbursed to banks issuing their credit cards. On each
Distribution Date, Servicer Interchange with respect to the related Due Period
that is on deposit in the Collection Account will be withdrawn from the
Collection Account and paid to the Servicer as described under "Series
Provisions--Servicing Compensation and Payment of Expenses" in the Prospectus.
 
THE RECEIVABLES
 
  The Receivables in the Accounts as of January 5, 1997 included $418,037,204
of Finance Charge Receivables and $32,633,125,361 of Principal Receivables
(which amounts include overdue Finance
 
                                     S-17
<PAGE>
 
Charge Receivables and overdue Principal Receivables). As of January 5, 1997
there were 25,678,632 Accounts. Included within the Accounts are inactive
Accounts that have no balance. The Accounts had an average Principal
Receivable balance of $1,271 and an average credit limit of $4,796. The
average total Receivable balance in the Accounts as a percentage of the
average credit limit with respect to the Accounts was 27%. Approximately 84%
of the Accounts were opened prior to December 1994. Approximately 13.27%,
11.03%, 6.65% and 5.61% of the Accounts related to cardholders having billing
addresses in California, New York, Texas and Florida, respectively. Not more
than 5% of the Accounts related to cardholders having billing addresses in any
other single state.
 
  The following tables summarize the Accounts by various criteria as of
January 5, 1997. References to "Receivables Outstanding" in the following
tables include both Finance Charge Receivables and Principal Receivables.
Because the composition of the Accounts will change in the future, these
tables are not necessarily indicative of the future composition of the
Accounts.
 
                  COMPOSITION OF ACCOUNTS BY ACCOUNT BALANCE
 
<TABLE>
<CAPTION>
                                       PERCENTAGE                  PERCENTAGE
                                        OF TOTAL                    OF TOTAL
                            NUMBER OF  NUMBER OF    RECEIVABLES    RECEIVABLES
      ACCOUNT BALANCE        ACCOUNTS   ACCOUNTS    OUTSTANDING    OUTSTANDING
- --------------------------- ---------  ---------- ---------------  -----------
<S>                         <C>        <C>        <C>              <C>
Credit Balance(1)..........    209,349     0.82%  $   (36,311,353)    (0.11)%
No Balance(2).............. 10,789,262    42.02                 0      0.00
Less than or equal to
 $500.00...................  3,391,921    13.21       716,032,557      2.17
$500.01 to $1,000.00.......  2,205,987     8.59     1,638,414,973      4.96
$1,000.01 to $2,000.00.....  3,315,730    12.91     4,878,052,723     14.76
$2,000.01 to $3,000.00.....  1,979,658     7.71     4,880,306,866     14.76
$3,000.01 to $4,000.00.....  1,214,022     4.73     4,203,714,817     12.72
$4,000.01 to $5,000.00.....    890,749     3.47     4,018,730,760     12.16
$5,000.01 to $6,000.00.....    560,707     2.18     3,065,532,598      9.27
$6,000.01 to $7,000.00.....    357,681     1.39     2,314,450,919      7.00
$7,000.01 to $8,000.00.....    247,130     0.96     1,846,671,368      5.59
$8,000.01 to $9,000.00.....    164,885     0.64     1,397,769,758      4.23
$9,000.01 to $10,000.00....    125,355     0.49     1,189,004,352      3.60
Over $10,000.00............    226,196     0.88     2,938,792,227      8.89
                            ----------   ------   ---------------    ------
  Total.................... 25,678,632   100.00%  $33,051,162,565    100.00%
</TABLE>
- --------
(1) Credit balances are a result of cardholder payments and credit adjustments
    applied in excess of an Account's unpaid balance. Accounts which currently
    have a credit balance are included because Receivables may be generated
    with respect thereto in the future.
(2) Accounts which currently have no balance are included because Receivables
    may be generated with respect thereto in the future.
 
                    COMPOSITION OF ACCOUNTS BY CREDIT LIMIT
 
<TABLE>
<CAPTION>
                                        PERCENTAGE                 PERCENTAGE
                                         OF TOTAL                   OF TOTAL
                             NUMBER OF  NUMBER OF    RECEIVABLES   RECEIVABLES
        CREDIT LIMIT          ACCOUNTS   ACCOUNTS    OUTSTANDING   OUTSTANDING
- ---------------------------- ---------- ---------- --------------- -----------
<S>                          <C>        <C>        <C>             <C>
Less than or equal to
 $500.00....................  1,551,458     6.04%  $    89,601,813     0.27%
$500.01 to $1,000.00........  1,736,049     6.76       563,784,057     1.71
$1,000.01 to $2,000.00......  4,496,063    17.51     2,986,440,479     9.03
$2,000.01 to $3,000.00......  3,370,648    13.13     3,086,898,571     9.34
$3,000.01 to $4,000.00......  2,409,046     9.38     2,739,808,275     8.29
$4,000.01 to $5,000.00......  2,813,650    10.96     3,760,834,216    11.38
Over $5,000.00..............  9,301,718    36.22    19,823,795,154    59.98
                             ----------   ------   ---------------   ------
  Total..................... 25,678,632   100.00%  $33,051,162,565   100.00%
</TABLE>
 
 
                                     S-18
<PAGE>
 
                   COMPOSITION OF ACCOUNTS BY PAYMENT STATUS
 
<TABLE>
<CAPTION>
                                         PERCENTAGE                 PERCENTAGE
                                          OF TOTAL                   OF TOTAL
                              NUMBER OF  NUMBER OF    RECEIVABLES   RECEIVABLES
       PAYMENT STATUS          ACCOUNTS   ACCOUNTS    OUTSTANDING   OUTSTANDING
- ----------------------------- ---------- ---------- --------------- -----------
<S>                           <C>        <C>        <C>             <C>
Current(1)................... 23,948,301    93.26%  $28,860,955,114    87.32%
Up to 34 days delinquent.....  1,018,380     3.97     2,393,256,552     7.24
35 to 64 days delinquent.....    318,537     1.24       714,531,764     2.16
65 to 94 days delinquent.....    149,902     0.58       394,431,726     1.19
95 to 124 days delinquent....    103,393     0.40       282,777,850     0.86
125 to 154 days delinquent...     78,250     0.31       224,318,662     0.68
155 to 184 days delinquent...     61,869     0.24       180,890,897     0.55
                              ----------   ------   ---------------   ------
  Total...................... 25,678,632   100.00%  $33,051,162,565   100.00%
</TABLE>
- --------
(1) Includes Accounts on which the minimum payment has not been received prior
    to the next billing date following the issuance of the related bill.
 
                        COMPOSITION OF ACCOUNTS BY AGE
 
<TABLE>
<CAPTION>
                                         PERCENTAGE                 PERCENTAGE
                                          OF TOTAL                   OF TOTAL
                              NUMBER OF  NUMBER OF    RECEIVABLES   RECEIVABLES
            AGE                ACCOUNTS   ACCOUNTS    OUTSTANDING   OUTSTANDING
- ----------------------------  ---------- ---------- --------------- -----------
<S>                           <C>        <C>        <C>             <C>
Less than or equal to 6
 months.....................           0     0.00%  $             0     0.00%
Over 6 months to 12 months..           0     0.00                 0     0.00
Over 12 months to 24
 months.....................   4,028,388    15.69     5,054,501,211    15.29
Over 24 months to 36
 months.....................   4,221,370    16.44     4,565,019,318    13.81
Over 36 months to 48
 months.....................   2,198,314     8.56     2,850,409,511     8.63
Over 48 months..............  15,230,560    59.31    20,581,232,525    62.27
                              ----------   ------   ---------------   ------
  Total.....................  25,678,632   100.00%  $33,051,162,565   100.00%
</TABLE>
 
BILLING AND PAYMENTS
 
  The Accounts have various billing and payment structures, including varying
periodic finance charges and fees. The following is information on the current
billing and payment characteristics of the Accounts.
 
  Monthly billing statements are sent by Citibank (South Dakota) to
cardholders with balances at the end of the billing period. Each month a VISA
or MasterCard cardholder must make a minimum payment equal to (a) with respect
to nonpremium accounts, the sum of (i) the greater of $20 (or, if the then
current balance is less than $20, such balance) and 1/48 of the then current
balance, (ii) any amount which is past due and (iii) any amount which is in
excess of the credit limit; or (b) with respect to premium accounts, the sum
of (i) the greater of $50 (or, if the then current balance is less than $50,
such balance) and 1/48 of the then current balance, (ii) any amount which is
past due and (iii) any amount which is in excess of the credit limit;
provided, that in each case the required minimum payment will not be less than
the finance charges billed. Prior to December 1993, the minimum payments were
determined by reference to 1/36 of the then current balance, rather than 1/48.
 
  A periodic finance charge is assessed on the Accounts. The periodic finance
charge assessed on balances for cash advances is calculated by multiplying (i)
the average daily balances for cash advances during the billing cycle by (ii)
the number of days in the billing cycle by (iii) the applicable daily periodic
finance charge. Cash advances are included in the average daily balance for
cash advances from the date such advances are made. The periodic finance
charge assessed on balances for purchases is calculated by multiplying the
average daily balance for purchases (the balance thereof on which finance
charges are assessed) by the applicable monthly periodic finance charge.
 
                                     S-19
<PAGE>
 
Purchases are included in the average daily balance for purchases generally
from the date of purchase. Periodic finance charges are not assessed in most
circumstances on purchase amounts if all balances shown in the previous
billing statement are paid in full by the due date indicated on such
statement. The periodic finance charge assessed on balances in most accounts
for cash advances and purchases is currently the Prime Rate (as published in
The Wall Street Journal ) plus a percentage ranging from 5.4% to 11.4% for
accounts in good standing, and the Prime Rate plus 12.9% for accounts which
have been recently, or currently are, delinquent. As of the most recent
quarterly reset date, the periodic finance charge ranged from 13.65% to 19.65%
for most accounts in good standing, and was 21.25% for most accounts which
have been recently, or currently are, delinquent. Citibank (South Dakota) may
change the periodic finance charge on accounts at any time by written notice
to the cardholders. Any announced increase in such rate will become effective
upon the earlier of subsequent use of a card and the expiration of a 25-day
period from the date such change was made effective (assuming failure on the
part of the cardholder to object to the new rate). Citibank (South Dakota)
also offers promotional rates of limited duration to attract new cardholders
and to promote balance transfers from other credit card issuers and, under
certain circumstances, the periodic finance charge on a limited number of
accounts may be greater or less than those assessed by Citibank (South Dakota)
generally.
 
  Prior to December 1993, Citibank (South Dakota) generally assessed an annual
membership fee of between $20 and $100 per account. Effective December 1,
1993, Citibank (South Dakota) eliminated the annual membership fee for certain
premium and nonpremium cardholders who met specified non-delinquency criteria.
This change did not apply to affinity or co-branded card products. In
addition, effective January 1, 1995, Citibank (South Dakota) eliminated the
annual fees applicable to certain other accounts, including certain of its
affinity and co-branded card products. These changes have reduced the gross
yield of the Accounts. Citibank (South Dakota) management believes that the
elimination of annual fees is within industry norm and is an important
component of management's initiative to maintain Citibank (South Dakota)'s
leadership position in the market for bank credit cards. Certain of the
Accounts may be subject to certain additional fees, including: (a) a late fee
of $20 if Citibank (South Dakota) does not receive a required minimum payment
by the payment due date shown on the monthly billing statement, which fee is
assessed monthly until the account is less than 30 days past due; (b) a cash
advance fee which is generally equal to 2% of the amount of the cash advance
(subject to a minimum fee of $2 with no maximum); (c) a returned payment fee
of $20; (d) a returned check fee of $20; (e) a stop payment fee of $20 and (f)
a fee of $20 with respect to each account with an outstanding balance over the
credit limit established for such account.
 
  Payments by cardholders to Citibank (South Dakota) on the Accounts are
processed and applied to all minimum amounts due, from the oldest to the most
current, with respect to the following items in the following order: (i)
periodic finance charges on cash advances; (ii) periodic finance charges on
purchases; (iii) cash advance amounts and (iv) purchase amounts. When all
minimum amounts due are paid, payments are generally allocated first to cash
advance balances and then to purchase balances. There can be no assurance that
periodic finance charges, fees and other charges will remain at current levels
in the future.
 
                                   THE BANKS
 
  Citibank (South Dakota), a national banking association and an indirect
wholly owned subsidiary of Citicorp located in Sioux Falls, South Dakota, was
formed in 1981 and conducts nationwide consumer lending programs primarily
comprised of credit card-related activities. Citibank (South Dakota) is the
nation's largest bank credit card issuer. The principal executive office of
Citibank (South Dakota) is located at 701 East 60th Street, North, Sioux
Falls, South Dakota 57117 (telephone (605) 331-2626).
 
 
                                     S-20
<PAGE>
 
  Citibank (Nevada), a national banking association and an indirect wholly
owned subsidiary of Citicorp located in Las Vegas, Nevada, was formed in 1985
and conducts a retail banking business in
the Las Vegas, Nevada area and services credit card accounts for certain of
its affiliates. The principal executive office of Citibank (Nevada) is located
at 8725 West Sahara Avenue, Las Vegas, Nevada 89163 (telephone (702) 797-
4444).
 
                        SUPPLEMENTAL SERIES PROVISIONS
 
CERTAIN DEFINITIONS
 
  "Class A Monthly Interest" means, with respect to any Distribution Date, the
product of (a) the Class A Certificate Rate in effect with respect to the
relevant Interest Period, (b) the outstanding principal amount of the Class A
Certificates as of the close of business on the preceding Distribution Date
(after subtracting therefrom the aggregate amount of all distributions of
Class A Monthly Principal previously made either to the Class A Principal
Funding Account or to the Class A Certificateholders) and (c) a fraction, the
numerator of which is the actual number of days from and including the prior
Distribution Date to but excluding such Distribution Date and the denominator
of which is 360 or, with respect to the first Distribution Date, interest on
the initial Class A Invested Amount at the Class A Certificate Rate from and
including the Series Issuance Date to but excluding such Distribution Date,
provided that such amount will be adjusted to reflect any Additional Issuance
during the related Due Period, and provided further that, solely for the
purpose of calculating Group One Investor Monthly Interest as described under
"Series Provisions--Allocations, Reallocations and Subordination--
Reallocations Among Investor Certificates of Different Series--Group One
Investor Finance Charges" in the Prospectus and, so long as the Servicer has
not terminated the Class A Interest Rate Swaps with the prior approval of the
Rating Agency, the reference to the Class A Certificate Rate in clause (a)
above shall be replaced by the Class A Swap Rate and the fraction referred to
in clause (c) above shall be replaced with one-twelfth.
 
  "Class B Monthly Interest" means, with respect to any Distribution Date, the
product of (a) the Class B Certificate Rate in effect with respect to the
relevant Interest Period, (b) the Class B Invested Amount as of the close of
business on the preceding Distribution Date (after giving effect to any
increase or decrease in the Class B Invested Amount on such preceding
Distribution Date) and (c) a fraction, the numerator of which is the actual
number of days from and including the prior Distribution Date to but excluding
such Distribution Date and the denominator of which is 360 or, with respect to
the first Distribution Date, interest on the initial Class B Invested Amount
at the Class B Certificate Rate from and including the Series Issuance Date to
but excluding such Distribution Date, provided that such amount will be
adjusted to reflect any Additional Issuance during the related Due Period and
provided further that, solely for the purpose of calculating Group One
Investor Monthly Interest as described under "Series Provisions--Allocations,
Reallocations and Subordination--Reallocations Among Investor Certificates of
Different Series--Group One Investor Finance Charges" in the Prospectus and,
so long as the Servicer has not terminated the Class B Interest Rate Swaps
with the prior approval of the Rating Agency, the reference to the Class B
Certificate Rate in clause (a) above shall be replaced by the Class B Swap
Rate and the fraction referred to in clause (c) above shall be replaced with
one-twelfth.
 
DETERMINATION OF LIBOR
 
  The Servicer will determine LIBOR for each applicable Interest Period on the
second business day prior to the applicable Payment Date (or, in the case of
the initial Interest Period, the second business day prior to the Series
Issuance Date) on which such Interest Period commences (each a "LIBOR
Determination Date"). For purposes of calculating LIBOR, a business day is any
day on which dealings in deposits in U.S. Dollars are transacted in the London
interbank market.
 
                                     S-21
<PAGE>
 
  "LIBOR" means, as of any LIBOR Determination Date, the rate for deposits in
U.S. Dollars for a period of the Designated Maturity (commencing on the first
day of the relevant Interest Period) which appears on the Telerate Page 3750
as of 11:00 a.m., London time, on such date. If such rate does not appear on
Telerate Page 3750, the rate for that day will be determined on the basis of
the rates at which deposits in U.S. Dollars are offered by the Reference Banks
at approximately 11:00 a.m., London time, on that day to prime banks in the
London interbank market for a period of the Designated Maturity (commencing on
the first day of the relevant Interest Period). The Servicer will request the
principal London office of each of the Reference Banks to provide a quotation
of its rate. If at least two such quotations are provided, the rate for that
day will be the arithmetic mean of the quotations. If fewer than two
quotations are provided as requested, the rate for that day will be the
arithmetic mean of the rates quoted by major banks in New York City, selected
by the Servicer, at approximately 11:00 a.m., New York City time, on that day
for loans in U.S. Dollars to leading European banks for a period of the
Designated Maturity (commencing on the first day of the relevant Interest
Period).
 
  "Designated Maturity" shall mean, for any LIBOR Determination Date, with
respect to the Revolving Period or the Accumulation Period, three months, and
for any LIBOR Determination Date with respect to the Early Amortization
Period, one month.
 
  "Telerate Page 3750" means the display page currently so designated on the
Dow Jones Telerate Service (or such other page as may replace that page on
that service for the purpose of displaying comparable rates or prices).
 
  "Reference Banks" means four major banks in the London interbank market
selected by the Servicer.
 
THE INTEREST RATE SWAPS
 
  On the Series Issuance Date, the Trustee will enter into the Class A
Interest Rate Swaps and the Class B Interest Rate Swaps with the Swap
Counterparties. The Class A Interest Rate Swaps will be for the exclusive
benefit of the Class A Certificateholders and the Class B Interest Rate Swaps
will be for the exclusive benefit of the Class B Certificateholders.
 
  Pursuant to the Class A Interest Rate Swaps, on each Swap Payment Date
payment will be made by the Trust to the Swap Counterparties (if the following
is a positive number) or by the Swap Counterparties to the Trust (if the
following is a negative number) of an amount in the aggregate equal to (i)
one-twelfth of the product of (A) the Class A Notional Amount and (B) the
Class A Swap Rate (or, with respect to the first Swap Payment Date, an amount
specified in the Series Supplement) minus (ii) the product of (A) a fraction,
the numerator of which is the actual number of days from and including the
prior Distribution Date to but excluding the related Distribution Date (or,
with respect to the first Swap Payment Date, the actual number of days from
and including the Series Issuance Date to but excluding the first Distribution
Date) and the denominator of which is 360, (B) the Class A Notional Amount and
(C) the Class A Certificate Rate. If such amount is positive, it will be
referred to herein as the "Class A Net Swap Payment", and if such amount is
negative, it will be referred to herein as the "Class A Net Swap Receipt". Any
Class A Net Swap Receipt in respect of a Swap Payment Date will be deposited
in the Class A Interest Funding Account and will be available to make
distributions of interest due on the Class A Certificates on the next Class A
Interest Payment Date. Any Class A Net Swap Payment in respect of a Swap
Payment Date will be paid out of funds on deposit in the Collection Account.
Each Class A Interest Rate Swap will terminate on the earliest of (a) the
Series Termination Date, (b) the Distribution Date on which the Class A
Invested Amount is reduced to zero and (c) the date designated by either the
Trustee or a Swap Counterparty as an early termination date with respect to
the relevant Class A Interest Rate Swap following a payment default by such
Swap Counterparty or the Trust, respectively, or certain other customary early
termination events. In addition,
 
                                     S-22
<PAGE>
 
upon approval of the Rating Agency, including confirmation that the ratings of
the Investor Certificates by the Rating Agency will not be withdrawn or
reduced, the Servicer may terminate the Class A Interest Rate Swaps, without
any liability of the Trust to the Swap Counterparties and without any
obligation of the Servicer to obtain a replacement interest rate swap.
 
  Pursuant to the Class B Interest Rate Swaps, on each Swap Payment Date
payment will be made by the Trust to the Swap Counterparties (if the following
is a positive number) or by the Swap Counterparties to the Trust (if the
following is a negative number) of an amount in the aggregate equal to (i)
one-twelfth of the product of (A) the Class B Notional Amount and (B) the
Class B Swap Rate (or, with respect to the first Swap Payment Date, an amount
specified in the Series Supplement) minus (ii) the product of (A) a fraction,
the numerator of which is the actual number of days from and including the
prior Distribution Date to but excluding the related Distribution Date (or,
with respect to the first Swap Payment Date, the actual number of days from
and including the Series Issuance Date to but excluding the first Distribution
Date) and the denominator of which is 360, (B) the Class B Notional Amount and
(C) the Class B Certificate Rate. If such amount is positive, it will be
referred to herein as the "Class B Net Swap Payment", and if such amount is
negative, it will be referred to herein as the "Class B Net Swap Receipt". Any
Class B Net Swap Receipt in respect of a Swap Payment Date will be deposited
in the Class B Interest Funding Account and will be available to make
distributions of interest due on the Class B Certificates on the next Class B
Interest Payment Date. Any Class B Net
Swap Payment in respect of a Swap Payment Date will be paid out of funds on
deposit in the Collection Account. Each Class B Interest Rate Swap will
terminate on the earliest of (a) the Series Termination Date, (b) the
Distribution Date on which the outstanding principal amount of the Class B
Certificates is reduced to zero and (c) the date designated by either the
Trustee or a Swap Counterparty as an early termination date with respect to
the relevant Class B Interest Rate Swap following a payment default by such
Swap Counterparty or the Trust, respectively, or certain other customary early
termination events. In addition, upon approval of the Rating Agency, including
confirmation that the ratings of the Investor Certificates by the Rating
Agency will not be withdrawn or reduced, and provided the Servicer has
terminated the Class A Interest Rate Swaps with the prior approval of the
Rating Agency, the Servicer may terminate the Class B Interest Rate Swaps,
without any liability of the Trust to the Swap Counterparties and without any
obligation of the Servicer to obtain a replacement interest rate swap.
 
  In the event the short-term debt rating of either Swap Counterparty is
withdrawn or reduced below A-1+ by Standard & Poor's or its long-term debt
rating is withdrawn or reduced below Aa3 by Moody's, the Servicer will, within
30 days after such rating withdrawal or reduction, use reasonable efforts to
(i) obtain a replacement interest rate swap agreement with terms substantially
the same as the respective Interest Rate Swap or (ii) establish any other
arrangement satisfactory to the applicable Rating Agency, such that the
ratings of the Investor Certificates by the applicable Rating Agency will not
be withdrawn or reduced. In the event no such replacement interest rate swap
agreement is obtained or any other such satisfactory arrangement established
within such period, an Early Amortization Event will occur. In addition, in
the event either Swap Counterparty fails to make any payment required under
its respective Interest Rate Swap within five days of the date such payment
was due, an Early Amortization Event will occur. See "Series Provisions--Early
Amortization Events" in the Prospectus.
 
  If the Class A Interest Rate Swaps or the Class B Interest Rate Swaps are
terminated by the Servicer with the prior approval of the Rating Agency, the
Class A Certificateholders or Class B Certificateholders, as the case may be,
will only be entitled to look to the assets of the Trust then available to
such Class for payments of interest. Any necessary conforming amendments to
the Series Supplement to reflect such termination may be made without the
consent of the Investor Certificateholders.
 
THE SWAP COUNTERPARTIES
 
  The Swap Counterparties will be Citibank (South Dakota), N.A. and Citibank
(Nevada), National Association (in such capacity, collectively, the "Swap
Counterparties" and individually, each a "Swap Counterparty").
 
                                     S-23
<PAGE>
 
  Citibank (South Dakota), a national banking association and an indirect
wholly owned subsidiary of Citicorp located in Sioux Falls, South Dakota, was
formed in 1981 and conducts nationwide consumer lending programs primarily
comprised of credit card-related activities. Citibank (South Dakota) is the
nation's largest bank credit card issuer. The principal executive office of
Citibank (South Dakota) is located at 701 East 60th Street, North, Sioux
Falls, South Dakota 57117. Citibank (South Dakota) has been assigned long-term
debt ratings of Aa3 by Moody's and AA- by Standard & Poor's and short-term
debt ratings of P-1 by Moody's and A-1+ by Standard & Poor's.
 
  As reflected in its Call Reports, Citibank (South Dakota) had total assets
(unaudited) of $13.5 billion and $12.7 billion at December 31, 1996 and 1995,
respectively, and net income (unaudited) of $436 million and $580 million for
the year ended December 31, 1996 and 1995, respectively.
 
  Citibank (Nevada), a national banking association and an indirect wholly
owned subsidiary of Citicorp located in Las Vegas, Nevada, was formed in 1985
and conducts a retail banking business in the Las Vegas, Nevada area and
services credit card accounts for certain of its affiliates. The principal
executive office of Citibank (Nevada) is located at 8725 West Sahara Avenue,
Las Vegas, Nevada 89163. Citibank (Nevada) has been assigned long-term debt
ratings of Aa3 by Moody's and AA- by Standard & Poor's and short-term debt
ratings of P-1 by Moody's and A-1+ by Standard & Poor's.
 
  As reflected in its Call Reports, Citibank (Nevada) had total assets
(unaudited) of $12.0 billion and $9.4 billion at December 31, 1996 and 1995,
respectively, and net income (unaudited) of $409 million and $410 million for
the year ended December 31, 1996 and 1995, respectively.
 
  Each of the Swap Counterparties submits quarterly to the Office of the
Comptroller of the Currency (the "Comptroller") certain reports called
"Consolidated Reports of Condition and Income for a Bank With Domestic Offices
Only" ("Call Reports"). The Call Reports are on file with, and publicly
available at, the Comptroller's offices at 250 E. Street, S.W., Washington,
D.C. 20219. The Call Reports of the Swap Counterparties for December 31, 1996
and December 31, 1995 are available upon request from the Trustee and the
Servicer. Each Call Report consists of a Balance Sheet, Income Statement,
Changes in Equity Capital and other supporting schedules as of the end of the
period to which the report relates. The Call Reports were prepared in
accordance with regulatory instructions issued by the Federal Financial
Institutions Examination Council. Because of the special supervisory,
regulatory and economic policy needs served by these Call Reports, those
regulatory instructions do not in all cases follow generally accepted
accounting principles or the opinions and statements of the Accounting
Principles Board or the Financial Accounting Standards Board. While the Call
Reports are supervisory and regulatory documents, not primarily accounting
documents, and do not provide a complete range of financial disclosure about
the Swap Counterparties, they nevertheless provide important information
concerning the financial condition of the Swap Counterparties.
 
ISSUANCE OF ADDITIONAL INVESTOR CERTIFICATES
 
  The Series Supplement provides that, from time to time during the Revolving
Period, the Banks may, subject to certain conditions described below, cause
the Trustee to issue Additional Investor Certificates (each such issuance, an
"Additional Issuance"). When issued, the Additional Investor Certificates of
each class will be identical in all respects to the other outstanding Investor
Certificates of that class and will be equally and ratably entitled to the
benefits of the Pooling Agreement and the Series Supplement without
preference, priority or distinction.
 
  In connection with each Additional Issuance, the outstanding principal
amounts of the Class A Certificates and the Class B Certificates and the
aggregate amount of Series Enhancement will all be increased pro rata. The
additional Series Enhancement provided in connection with an Additional
Issuance may take the form of an additional deposit to the Cash Collateral
Account, the purchase of interest rate caps or swaps and/or another form of
Series Enhancement, provided that the form and amount of additional Series
Enhancement will not cause a Ratings Effect.
 
                                     S-24
<PAGE>
 
  Following an Additional Issuance, the respective portions of the Series
Enhancement that are for the benefit of the Class A Certificateholders and the
Class B Certificateholders will remain the same, as a percentage of the total
Series Enhancement, as the respective proportions in effect on the Series
Issuance Date. The Class A Controlled Amortization Amount will be increased
proportionately to reflect the principal amount of additional Class A
Certificates, and the Class A Investment Fee will also be increased, provided
that the ratio of the maximum possible Class A Investment Fee to the Invested
Amount after giving effect to the Additional Issuance shall not be more than
150% of that ratio as in effect on the Series Issuance Date.
 
  Additional Investor Certificates may be issued only upon the satisfaction of
certain conditions provided in the Series Supplement, including the following:
(a) on or before the fifth Business Day immediately preceding the date on
which the Additional Investor Certificates are to be issued, the Banks shall
have given the Trustee, the Servicer and any provider of Series Enhancement
written notice of such issuance and the date upon which it is to occur; (b)
after giving effect to the Additional Issuance, the total amount of Principal
Receivables shall be at least equal to the Required Minimum Principal Balance;
(c) the Banks shall have delivered to the Trustee any additional Series
Enhancement agreement related to the Additional Issuance, executed by each of
the parties to such agreement; (d) the Trustee shall have received
confirmation from the Rating Agency that such Additional Issuance will not
result in a Ratings Effect; (e) the Banks shall have delivered to the Trustee
a certificate of an authorized officer, dated the date upon which the
Additional Issuance is to occur, to the effect that the Banks reasonably
believe that such issuance will not at the time of its occurrence or at a
future date cause an Adverse Effect; (f) as of the date of the Additional
Issuance and taking the Additional Issuance into account, the amount on
deposit in the Cash Collateral Account, together with any additional Series
Enhancement, shall not be less than the amount required so that the Additional
Issuance will not result in a Ratings Effect; (g) as of the date of the
Additional Issuance, all amounts due and owing to the holders of Investor
Certificates shall have been paid, and there shall not be any unreimbursed
Class A or Class B Investor Charge-Offs; (h) the excess of the principal
amount of the Additional Investor Certificates over their issue price shall
not exceed the maximum amount permitted under the Code without the creation of
original issue discount; (i) the Banks' remaining interest in Principal
Receivables shall not be less than 2% of the total amount of Principal
Receivables, in each case as of the date upon which the Additional Issuance is
to occur after giving effect to such issuance; (j) as of the date of the
Additional Issuance and taking the Additional Issuance into account, the
Notional Amount must equal the sum of the initial principal amount of the
Class A Certificates and the principal amount of any Class A Certificates
issued pursuant to such Additional Issuance; and (k) the Banks shall have
delivered to the Trustee an opinion of counsel acceptable to the Trustee that
for federal and South Dakota income and franchise tax purposes (i) following
the Additional Issuance the Trust will not be an association (or publicly
traded partnership) taxable as a corporation, (ii) the Additional Investor
Certificates will be properly characterized as debt and (iii) the Additional
Issuance will not adversely affect the characterization of the outstanding
Investor Certificates or the investor certificates of any other Series as debt
and will not cause a taxable event to holders of any such investor
certificates.
 
  There are no restrictions on the timing or amount of any Additional
Issuance, provided that the conditions described above are met. As of the date
of any Additional Issuance, the Class A Invested Amount and the Class B
Invested Amount will be increased to reflect the initial principal balance of
the Additional Investor Certificates of the respective classes.
 
POSTPONEMENT OF ACCUMULATION PERIOD
 
  Upon written notice to the Trustee, the Sellers, the Rating Agency and the
Cash Collateral Depositor, the Servicer may elect to shorten the length of the
Accumulation Period, and extend by an equivalent period the length of the
Revolving Period, subject to certain conditions including those set
 
                                     S-25
<PAGE>
 
forth below. The Servicer may make such election only if the Accumulation
Period Length (determined as described below) is less than twelve months. On
the Determination Date immediately preceding the February 2008 Distribution
Date and thereafter on each Determination Date until the date the Accumulation
Period begins, the Servicer will determine the "Accumulation Period Length"
based on the amount of principal available to the investor certificates of all
Series determined based on the lowest monthly principal payment rate on the
Receivables for the prior 12 months and the amount of principal distributable
to the Certificateholders of all outstanding Series (excluding certain
specified Series) which are not in their revolving period. If the Accumulation
Period Length is less than twelve months, the Servicer may, at its option,
postpone the commencement of the Accumulation Period such that the number of
months included in the Accumulation Period will be equal to or exceed the
Accumulation Period Length. The effect of the foregoing calculation is to
permit the reduction of the length of the Accumulation Period based on the
invested amounts of certain other Series which are scheduled to be in their
revolving periods during the Accumulation Period and on increases in the
principal payment rate, which, if continued, would result in a shorter
Accumulation Period. The length of the Accumulation Period will not be less
than one month and will not be shorter than the period determined as of the
first date of determination unless the Trust has issued another Series of
investor certificates subsequent to that date and such Series is in its
revolving period. If the Accumulation Period is postponed in accordance with
the foregoing, and if an Early Amortization Event occurs after the date
originally scheduled as the commencement of the Accumulation Period, it is
probable that holders of Investor Certificates would receive some of their
principal later than if the Accumulation Period had not been so postponed.
 
                                 UNDERWRITING
 
  Subject to the terms and conditions set forth in the underwriting agreement
relating to the Class A Certificates (the "Class A Underwriting Agreement"),
the Banks have agreed to cause the Trust to sell to each of the underwriters
named below (the "Class A Underwriters"), and each of the Class A Underwriters
has severally agreed to purchase, the principal amount of Class A Certificates
set forth opposite its name:
 
                             CLASS A CERTIFICATES
 
<TABLE>
<CAPTION>
                                                                    PRINCIPAL
        CLASS A UNDERWRITERS                                          AMOUNT
        --------------------                                       ------------
   <S>                                                             <C>
   Goldman, Sachs & Co. .......................................... $187,500,000
   Citibank, N.A. ................................................  187,500,000
   Credit Suisse First Boston Corporation.........................  187,500,000
   Salomon Brothers Inc...........................................  187,500,000
                                                                   ------------
        Total..................................................... $750,000,000
                                                                   ============
</TABLE>
 
  In the Class A Underwriting Agreement, the several Class A Underwriters have
agreed, subject to the terms and conditions set forth therein, to purchase all
$750,000,000 aggregate principal amount of the Class A Certificates offered
hereby if any Class A Certificates are purchased. In the event of default by
any Class A Underwriter, the Class A Underwriting Agreement provides that, in
certain circumstances, purchase commitments of the nondefaulting Class A
Underwriters may be increased or the Class A Underwriting Agreement may be
terminated. The Banks have been advised by the Class A Underwriters that the
several Class A Underwriters propose initially to offer the Class A
Certificates to the public at the public offering price set forth on the cover
page of this Prospectus Supplement, and to certain dealers at such price less
a concession not in excess of 0.40% of the principal amount of the Class A
Certificates. The Class A Underwriters may allow and such dealers may reallow
to other dealers a concession not in excess of 0.20% of such principal amount.
After the initial public offering, the public offering price and such
concessions may be changed.
 
                                     S-26
<PAGE>
 
  Subject to the terms and conditions set forth in the underwriting agreement
relating to the Class B Certificates (the "Class B Underwriting Agreement";
the Class A Underwriting Agreement and the Class B Underwriting Agreement are
collectively referred to herein as the "Underwriting Agreements"), the Banks
have agreed to cause the Trust to sell to each of the underwriters named below
(the "Class B Underwriters"; the Class A Underwriters and the Class B
Underwriters are collectively referred to herein as the "Underwriters") and
each of the Class B Underwriters has severally agreed to purchase, the
principal amount of Class B Certificates set forth opposite its name:
 
                             CLASS B CERTIFICATES
 
<TABLE>
<CAPTION>
                                                                      PRINCIPAL
        CLASS B UNDERWRITERS                                           AMOUNT
        --------------------                                         -----------
   <S>                                                               <C>
   Citibank, N.A. .................................................. $24,000,000
   Goldman, Sachs & Co. ............................................  24,000,000
                                                                     -----------
        Total....................................................... $48,000,000
                                                                     ===========
</TABLE>
 
  In the Class B Underwriting Agreement, the several Class B Underwriters have
agreed, subject to the terms and conditions set forth therein, to purchase all
$48,000,000 aggregate principal amount of the Class B Certificates offered
hereby if any Class B Certificates are purchased. In the event of default by a
Class B Underwriter, the Class B Underwriting Agreement provides that, in
certain circumstances, the purchase commitment of the nondefaulting Class B
Underwriter may be increased or the Class B Underwriting Agreement may be
terminated. The Banks have been advised by the Class B Underwriters that the
several Class B Underwriters propose initially to offer the Class B
Certificates to the public at the public offering price set forth on the cover
page of this Prospectus Supplement, and to certain dealers at such price less
a concession not in excess of 0.425% of the principal amount of the Class B
Certificates. The Class B Underwriters may allow and such dealers may reallow
to other dealers a concession not in excess of 0.25% of such principal amount.
After the initial public offering, the public offering price and such
concessions may be changed.
 
  Each Underwriter that is a foreign broker or dealer not eligible for
membership in the National Association of Securities Dealers, Inc. (the
"NASD") has agreed not to make any sales within the United States, its
territories or possessions or to persons who are citizens thereof or residents
therein (other than certain sales made by the Underwriters as a group) except
that each such Underwriter shall be permitted to make sales to the other
Underwriters or to their United States affiliates provided that such sales are
made in compliance with applicable rules under the Exchange Act and in
conformity with the Rules of Fair Practice of the NASD.
 
  Each Underwriter will represent and agree that:
 
    (a) it has complied and will comply with all applicable provisions of the
  Financial Services Act 1986 with respect to anything done by it in relation
  to the Investor Certificates in, from or otherwise involving the United
  Kingdom;
 
    (b) it has only issued, distributed or passed on and will only issue,
  distribute or pass on in the United Kingdom any document received by it in
  connection with the issue of the Investor Certificates to a person who is
  of a kind described in Article 11(3) of the Financial Services Act 1986
  (Investment Advertisements) (Exemptions) Order 1996 or is a person to whom
  such document may otherwise lawfully be issued, distributed or passed on;
 
    (c) if it is an authorized person under Chapter III of Part I of the
  Financial Services Act 1986, it has only promoted and will only promote (as
  that term is defined in Regulation 1.02(2) of the Financial Services
  (Promotion of Unregulated Schemes) Regulations 1991) to any person in the
  United Kingdom the scheme described in this Prospectus Supplement and the
  Prospectus if that person is a kind described either in section 76(2) of
  the Financial Services Act 1986 or in
 
                                     S-27
<PAGE>
 
  Regulation 1.04 of the Financial Services (Promotion of Unregulated
  Schemes) Regulations 1991; and
 
    (d) it is a person of a kind described in Article 11(3) of the Financial
  Services Act 1986 (Investment Advertisements) (Exemptions) Order 1996.
 
  The Underwriting Agreements provide that the Banks will indemnify the
Underwriters against certain liabilities, including liabilities under
applicable securities laws, or contribute to payments the Underwriters may be
required to make in respect thereof.
 
  The closing of the sale of each class of Investor Certificates is
conditioned upon the closing of the sale of the other class.
 
  Citibank, N.A. is an affiliate of the Banks.
 
                                 LEGAL MATTERS
 
  Certain legal matters relating to the Investor Certificates will be passed
upon for the Banks and the Trust by Stephen E. Dietz, an Associate General
Counsel of Citibank, N.A., and for the Underwriters by Cravath, Swaine &
Moore, New York, New York. Mr. Dietz owns or has the right to acquire a number
of shares of common stock of Citicorp equal to less than .01% of the
outstanding common stock of Citicorp. Certain federal income tax and ERISA
matters will be passed upon for the Banks and the Trust by Cravath, Swaine &
Moore, New York, New York and certain South Dakota tax matters will be passed
upon for the Banks and the Trust by Davenport, Evans, Hurwitz & Smith, L.L.P.,
Sioux Falls, South Dakota.
 
                                     S-28
<PAGE>
 
                              GLOSSARY SUPPLEMENT
 
<TABLE>
<S>                                                                         <C>
Accumulation Period........................................................  S-9
Accumulation Period Length................................................. S-26
Additional Investor Certificates...........................................  S-9
Additional Issuance........................................................ S-24
Banks......................................................................  S-1
Call Reports............................................................... S-24
Cash Collateral Account....................................................  S-7
Citibank (Nevada)..........................................................  S-1
Citibank (South Dakota)....................................................  S-1
Cedel......................................................................  S-1
Class A Certificate Rate...................................................  S-3
Class A Certificates.......................................................  S-1
Class A Controlled Amortization Amount.....................................  S-3
Class A Enhancement........................................................  S-3
Class A ERISA Eligibility..................................................  S-5
Class A Expected Final Payment Date........................................  S-3
Class A Interest Payment Dates.............................................  S-3
Class A Interest Rate Swaps................................................  S-4
Class A Investment Fee.....................................................  S-3
Class A Monthly Interest................................................... S-21
Class A Net Swap Payment...................................................  S-5
Class A Net Swap Receipt...................................................  S-5
Class A Notional Amount....................................................  S-4
Class A Ratings............................................................  S-5
Class A Swap Rate..........................................................  S-4
Class A Underwriters....................................................... S-26
Class A Underwriting Agreement............................................. S-26
Class B Certificate Rate...................................................  S-5
Class B Certificates.......................................................  S-1
Class B Enhancement........................................................  S-6
Class B ERISA Eligibility..................................................  S-7
Class B Expected Final Payment Date........................................  S-6
Class B Interest Payment Dates.............................................  S-6
Class B Interest Rate Swaps................................................  S-6
Class B Net Swap Payment...................................................  S-7
Class B Net Swap Receipt...................................................  S-7
Class B Monthly Interest................................................... S-21
Class B Notional Amount....................................................  S-6
Class B Ratings............................................................  S-7
Class B Swap Rate..........................................................  S-6
Class B Underwriters....................................................... S-27
Class B Underwriting Agreement............................................. S-27
Comptroller................................................................ S-24
Credit Enhancement.........................................................  S-7
Designated Maturity........................................................ S-22
Distribution Date..........................................................  S-7
DTC........................................................................  S-1
Euroclear..................................................................  S-1
Group One..................................................................  S-9
Initial Cash Collateral Amount.............................................  S-7
Initial Class B Enhancement Amount.........................................  S-6
Initial Shared Enhancement Amount..........................................  S-4
</TABLE>
 
                                      S-29
<PAGE>
 
<TABLE>
<S>                                                                         <C>
Interchange................................................................ S-17
Interest Rate Swaps........................................................  S-2
Investor Certificates......................................................  S-1
LIBOR ..................................................................... S-22
LIBOR Determination Date................................................... S-21
NASD....................................................................... S-27
Net Servicing Fee Rate..................................................... S-10
Portfolio.................................................................. S-11
Receivables................................................................  S-9
Reference Banks............................................................ S-22
Revolving Period...........................................................  S-9
Series Cut-Off Date........................................................  S-9
Series Issuance Date.......................................................  S-9
Series Supplement..........................................................  S-9
Series Termination Date.................................................... S-10
Servicer Interchange Rate.................................................. S-10
Servicing Compensation..................................................... S-10
Summary of Terms...........................................................  S-3
Swap Counterparties........................................................ S-23
Swap Counterparty.......................................................... S-23
Swap Payment Date..........................................................  S-4
Telerate Page 3750......................................................... S-22
Trust......................................................................  S-1
Trust Cut-Off Date......................................................... S-14
Underwriters............................................................... S-27
Underwriting Agreements.................................................... S-27
</TABLE>
 
                                      S-30
<PAGE>
 
                                    ANNEX I
 
                   PRIOR ISSUANCES OF INVESTOR CERTIFICATES
 
  The tables below set forth the principal characteristics of the Credit Card
Participation Certificates, Series 1991-3, 1991-6, 1992-1, 1992-3, 1993-1,
1993-2, 1993-3, 1994-1, 1994-2, 1994-3, 1994-A, 1994-4, 1995-1, 1995-3, 1995-
4, 1995-5, 1995-6, 1995-A, 1995-J1, 1995-7, 1995-8, 1995-9, 1995-10, 1995-11,
1996-1, 1996-2, 1996-3, 1996-4, 1996-5, 1996-6, 1997-1, 1997-2 and 1997-3, the
only other Series heretofore issued by the Trust and still outstanding. For
more specific information with respect to any Series, any prospective investor
should contact the Servicer at (718) 248-5163. The Servicer will provide,
without charge, to any prospective purchaser of Investor Certificates, a copy
of the Disclosure Documents for any previous or concurrent publicly issued
Series.
 
1. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1991-3
 
Group..................................................................... One 
Class A Invested Amount.......................................... $875,000,000
Class B Invested Amount.......................................... $109,000,000
Class A Certificate Rate..................................... 8 7/8% per annum
Class B Certificate Rate..................................... 9 1/4% per annum
Class A Expected Final Payment Date............... July 1998 Distribution Date
Class B Expected Final Payment Date.......... September 1998 Distribution Date
Initial Cash Collateral Amount.................................... $68,880,000
Series Servicing Fee Rate*.................................... 1.87% per annum
Series Termination Date...................... September 1999 Distribution Date 
Series Issuance Date............................................ June 27, 1991
 
2. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1991-6
 
Group..................................................................... One 
Class A Invested Amount.......................................... $850,000,000
Class B Invested Amount.......................................... $105,500,000
Class A Certificate Rate..................................... 7.875% per annum
Class B Certificate Rate..................................... 8.350% per annum
Class A Expected Final Payment Date........... November 1998 Distribution Date
Class B Expected Final Payment Date............ January 1999 Distribution Date
Initial Cash Collateral Amount.................................... $47,775,000
Stated L/C Amount................................................. $19,110,000
Series Servicing Fee Rate*.................................... 1.87% per annum
Series Termination Date........................ January 2000 Distribution Date
Series Issuance Date........................................ November 20, 1991
 
- --------
* With respect to Series 1991-3 through Series 1992-3, the Series Servicing
  Fee did not include any Servicer Interchange or similar amount. As a result,
  the term "Portfolio Yield", when used with respect to any such Series, would
  not be reduced by the amount of any Servicer Interchange or similar amount
  with respect to any Series. See "Special Considerations--Master Trust
  Considerations--The Ability of Citibank (South Dakota) to Change Terms of
  the Accounts" in the Prospectus.
 
                                      I-1
<PAGE>
 
3. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1992-1
 
Group..................................................................... One
Class A Invested Amount........................................ $1,550,000,000
Class B Invested Amount.......................................... $134,800,000
Class A Certificate Rate....................................... Floating  Rate
Class B Certificate Rate..................................... 6 1/4% per annum
Class A Expected Final Payment Date............. August 1997 Distribution Date
Class B Expected Final Payment Date.......... September 1997 Distribution Date
Initial Cash Collateral Amount.................................... $80,300,000
Stated L/C Amount................................................. $25,000,000
Series Servicing Fee Rate*.................................... 1.87% per annum
Series Termination Date...................... September 1998 Distribution Date
Series Issuance Date.......................................... August 20, 1992
 
4. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1992-3
 
Group..................................................................... One
Class A Invested Amount........................................ $1,250,000,000
Class B Invested Amount........................................... $80,000,000
Class A Certificate Rate........................................ Floating Rate
Class B Certificate Rate........................................ Floating Rate
Class A Expected Final Payment Date............... September 1997 Payment Date
Class B Expected Final Payment Date................. October 1997 Payment Date
Initial Shared Enhancement Amount................................. $66,500,000
Initial Class B Enhancement Amount................................ $26,600,000
Series Servicing Fee Rate*.................................... 1.87% per annum
Series Termination Date............................. October 1998 Payment Date
Series Issuance Date....................................... September 30, 1992
 
5. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1993-1
 
Group..................................................................... One
Maximum Class A Invested Amount.................................. $850,000,000
Class B Invested Amount........................................... $74,000,000
Class A Certificate Rate........................................ Floating Rate
Class B Certificate Rate..................................... 5 1/2% per annum
Class A Expected Final Payment Date............. August 1997 Distribution Date
Class B Expected Final Payment Date.......... September 1997 Distribution Date
Stated L/C Amount................................................. $55,440,000
Series Servicing Fee Rate..................................... 0.37% per annum
Series Termination Date...................... September 1998 Distribution Date
Series Issuance Date.......................................... August 11, 1993
 
- --------
* With respect to Series 1991-3 through Series 1992-3, the Series Servicing Fee
  did not include any Servicer Interchange or similar amount. As a result, the
  term "Portfolio Yield", when used with respect to any such Series, would not
  be reduced by the amount of any Servicer Interchange or similar amount with
  respect to any Series. See "Special Considerations--Master Trust
  Considerations--The Ability of Citibank (South Dakota) to Change Terms of the
  Accounts" in the Prospectus.
 
                                      I-2
<PAGE>
 
6. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1993-2
 
Group...................................................................... One
Class A Invested Amount........................................... $750,000,000
Class B Invested Amount............................................ $48,000,000
Class A Certificate Rate....................................... 5.95% per annum
Class B Certificate Rate....................................... 6.15% per annum
Class A Expected Final Payment Date........... September 2003 Distribution Date
Class B Expected Final Payment Date............. October 2003 Distribution Date
Initial Shared Enhancement Amount.................................. $39,900,000
Initial Class B Enhancement Amount................................. $15,960,000
Series Servicing Fee Rate...................................... 0.37% per annum
Series Termination Date......................... October 2004 Distribution Date
Series Issuance Date......................................... September 2, 1993
 
7. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1993-3
 
Group...................................................................... One
Class A Invested Amount........................................... $750,000,000
Class B Invested Amount............................................ $48,000,000
Class A Certificate Rate....................................... 5.50% per annum
Class B Certificate Rate....................................... 5.70% per annum
Class A Expected Final Payment Date............. January 1999 Distribution Date
Class B Expected Final Payment Date............ February 1999 Distribution Date
Initial Shared Enhancement Amount.................................. $39,900,000
Initial Class B Enhancement Amount................................. $15,960,000
Series Servicing Fee Rate...................................... 0.37% per annum
Series Termination Date........................ February 2000 Distribution Date
Series Issuance Date......................................... December 21, 1993
 
8. CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1994-1
 
Group...................................................................... One
Class B Invested Amount............................................ $48,000,000
Class B Certificate Rate....................................... 4.85% per annum
Class B Expected Final Payment Date............... March 1997 Distribution Date
Initial Shared Enhancement Amount.................................. $39,900,000
Initial Class B Enhancement Amount................................. $15,960,000
Series Servicing Fee Rate...................................... 0.37% per annum
Series Termination Date........................... March 1999 Distribution Date
Series Issuance Date.......................................... January 28, 1994
 
                                      I-3
<PAGE>
 
9. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1994-2
 
Group................................................................ One
Class A Invested Amount..................................... $940,000,000
Class B Invested Amount...................................... $60,000,000
Class A Certificate Rate................................. 7.25% per annum
Class B Certificate Rate................................. 7.50% per annum
Class A Expected Final Payment Date......... April 2006 Distribution Date
Class B Expected Final Payment Date......... April 2006 Distribution Date
Initial Shared Enhancement Amount............................ $50,000,000
Initial Class B Enhancement Amount........................... $20,000,000
Series Servicing Fee Rate................................ 0.37% per annum
Series Termination Date..................... April 2008 Distribution Date
Series Issuance Date...................................... March 30, 1994
 
10. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1994-3
 
Group................................................................ One
Class A Invested Amount..................................... $500,000,000
Class B Invested Amount...................................... $32,000,000
Class A Certificate Rate................................. 6.80% per annum
Class B Certificate Rate................................. 7.00% per annum
Class A Expected Final Payment Date......... April 1999 Distribution Date
Class B Expected Final Payment Date......... April 1999 Distribution Date
Initial Shared Enhancement Amount............................ $26,600,000
Initial Class B Enhancement Amount........................... $10,640,000
Series Servicing Fee Rate................................ 0.37% per annum
Series Termination Date..................... April 2001 Distribution Date
Series Issuance Date...................................... April 14, 1994
 
11. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1994-A
 
Group................................................................ One
Class A Invested Amount..................................... $350,000,000
Class B Invested Amount...................................... $22,400,000
Class A Certificate Rate................................ 7.875% per annum
Class B Certificate Rate................................... Floating Rate
Class A Expected Final Payment Date...... December 1997 Distribution Date
Class B Expected Final Payment Date...... December 1997 Distribution Date
Initial Shared Enhancement Amount............................ $18,620,000
Initial Class B Enhancement Amount............................ $7,448,000
Series Servicing Fee Rate................................ 0.37% per annum
Series Termination Date.................. December 1999 Distribution Date
Series Issuance Date.................................... December 7, 1994
 
                                      I-4
<PAGE>
 
12. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1994-4
 
Group...................................................................... One
Class A Invested Amount........................................... $750,000,000
Class B Invested Amount............................................ $48,000,000
Class A Certificate Rate....................................... 8.25% per annum
Class B Certificate Rate......................................... Floating Rate
Class A Expected Final Payment Date............ November 2001 Distribution Date
Class B Expected Final Payment Date............ November 2001 Distribution Date
Initial Shared Enhancement Amount.................................. $39,900,000
Initial Class B Enhancement Amount................................. $15,960,000
Series Servicing Fee Rate...................................... 0.37% per annum
Series Termination Date........................ November 2003 Distribution Date
Series Issuance Date......................................... December 14, 1994
 
13. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1995-1
 
Group...................................................................... One
Class A Invested Amount........................................... $625,000,000
Class B Invested Amount............................................ $40,000,000
Class A Certificate Rate....................................... 8.25% per annum
Class B Certificate Rate....................................... 8.45% per annum
Class A Expected Final Payment Date............. January 2005 Distribution Date
Class B Expected Final Payment Date............. January 2005 Distribution Date
Initial Shared Enhancement Amount.................................. $33,250,000
Initial Class B Enhancement Amount................................. $13,300,000
Series Servicing Fee Rate...................................... 0.37% per annum
Series Termination Date......................... January 2007 Distribution Date
Series Issuance Date.......................................... January 20, 1995
 
14. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1995-3
 
Group...................................................................... One
Class A Invested Amount........................................... $625,000,000
Class B Invested Amount............................................ $40,000,000
Class A Certificate Rate....................................... 7.85% per annum
Class B Certificate Rate......................................... Floating Rate
Class A Expected Final Payment Date............ February 2000 Distribution Date
Class B Expected Final Payment Date............ February 2000 Distribution Date
Initial Shared Enhancement Amount.................................. $33,250,000
Initial Class B Enhancement Amount................................. $13,300,000
Series Servicing Fee Rate...................................... 0.37% per annum
Series Termination Date........................ February 2002 Distribution Date
Series Issuance Date......................................... February 16, 1995
 
                                      I-5
<PAGE>
 
15. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1995-4
 
Group...................................................................... One
Class A Invested Amount......................................... $1,000,000,000
Class B Invested Amount............................................ $64,000,000
Class A Certificate Rate......................................... Floating Rate
Class B Certificate Rate....................................... 7.65% per annum
Class A Expected Final Payment Date................. February 1998 Payment Date
Class B Expected Final Payment Date................. February 1998 Payment Date
Initial Shared Enhancement Amount.................................. $53,200,000
Initial Class B Enhancement Amount................................. $21,280,000
Series Servicing Fee Rate...................................... 0.37% per annum
Series Termination Date............................. February 2000 Payment Date
Series Issuance Date......................................... February 23, 1995
 
16. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1995-5
 
Group...................................................................... One
Class A Invested Amount......................................... $1,000,000,000
Class B Invested Amount............................................ $64,000,000
Class A Certificate Rate......................................... Floating Rate
Class B Certificate Rate......................................... Floating Rate
Class A Expected Final Payment Date................. May 1998 Distribution Date
Class B Expected Final Payment Date................. May 1998 Distribution Date
Initial Shared Enhancement Amount.................................. $53,200,000
Initial Class B Enhancement Amount................................. $21,280,000
Series Servicing Fee Rate...................................... 0.37% per annum
Series Termination Date............................. May 2000 Distribution Date
Series Issuance Date............................................... May 9, 1995
 
17. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1995-6
 
Group...................................................................... One
Class A Invested Amount........................................... $750,000,000
Class B Invested Amount............................................ $48,000,000
Class A Certificate Rate....................................... 6.75% per annum
Class B Certificate Rate....................................... 6.90% per annum
Class A Expected Final Payment Date................ June 1998 Distribution Date
Class B Expected Final Payment Date................ June 1998 Distribution Date
Initial Shared Enhancement Amount.................................. $39,900,000
Initial Class B Enhancement Amount................................. $15,960,000
Series Servicing Fee Rate...................................... 0.37% per annum
Series Termination Date............................ June 2000 Distribution Date
Series Issuance Date.............................................. May 11, 1995
 
                                      I-6
<PAGE>
 
18. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1995-A
 
Group...................................................................... One
Class A Invested Amount........................................... $300,000,000
Class B Invested Amount............................................ $19,150,000
Class A Certificate Rate......................................... Floating Rate
Class B Certificate Rate......................................... Floating Rate
Class A Expected Final Payment Date................ September 1998 Payment Date
Class B Expected Final Payment Date................ September 1998 Payment Date
Initial Shared Enhancement Amount.................................. $15,957,500
Initial Class B Enhancement Amount.................................. $6,383,000
Series Servicing Fee Rate...................................... 0.37% per annum
Series Termination Date............................ September 2000 Payment Date
Series Issuance Date............................................ August 2, 1995
 
19. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1995-J1
 
Group...................................................................... One
Class A Invested Amount........................................... $340,715,503
Class B Invested Amount............................................ $21,750,000
Class A Certificate Rate...................................... 6.483% per annum
Class B Certificate Rate......................................... Floating Rate
Class A Expected Final Payment Date.............. August 2000 Distribution Date
Class B Expected Final Payment Date.............. August 2000 Distribution Date
Initial Shared Enhancement Amount.................................. $18,123,276
Initial Class B Enhancement Amount.................................. $7,249,310
Series Servicing Fee Rate...................................... 0.37% per annum
Series Termination Date.......................... August 2002 Distribution Date
Series Issuance Date............................................ August 7, 1995
 
20. CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1995-7
 
Group.......................................................................One
Maximum Allocable Invested Amount................................$2,000,000,000
Certificate Rate..................................................Floating Rate
Required Available Cash Collateral Amount.......7.75% of the Allocable Invested
                                                                        Amount
Series Servicing Fee Rate.......................................0.37% per annum
Earliest Possible Series Termination Date.........August 2001 Distribution Date
Series Issuance Date............................................August 17, 1995
 
                                      I-7
<PAGE>
 
21. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1995-8
 
Group.......................................................................One
Class A Invested Amount............................................$400,000,000
Class B Invested Amount.............................................$25,540,000
Class A Certificate Rate........................................6.70% per annum
Class B Certificate Rate........................................6.85% per annum
Class A Expected Final Payment Date............September 2000 Distribution Date
Class B Expected Final Payment Date............September 2000 Distribution Date
Earliest Possible Initial Principal Payment Date....September 1998 Distribution
                                                                          Date
Initial Shared Enhancement Amount...................................$21,277,000
Initial Class B Enhancement Amount...................................$8,510,800
Series Servicing Fee Rate.......................................0.37% per annum
Series Termination Date........................September 2002 Distribution Date
Series Issuance Date..........................................September 7, 1995
 
22. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1995-9
 
Group.......................................................................One
Class A Invested Amount............................................$500,000,000
Class B Invested Amount.............................................$32,000,000
Class A Certificate Rate........................................6.55% per annum
Class B Certificate Rate........................................6.65% per annum
Class A Expected Final Payment Date..............October 2005 Distribution Date
Class B Expected Final Payment Date..............October 2005 Distribution Date
Initial Shared Enhancement Amount...................................$26,600,000
Initial Class B Enhancement Amount..................................$10,640,000
Series Servicing Fee Rate.......................................0.37% per annum
Series Termination Date..........................October 2007 Distribution Date
Series Issuance Date...........................................October 13, 1995
 
23. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1995-10
 
Group.......................................................................One
Class A Invested Amount............................................$750,000,000
Class B Invested Amount.............................................$48,000,000
Class A Certificate Rate........................................5.90% per annum
Class B Certificate Rate........................................6.05% per annum
Class A Expected Final Payment Date.............February 1999 Distribution Date
Class B Expected Final Payment Date.............February 1999 Distribution Date
Initial Shared Enhancement Amount...................................$39,900,000
Initial Class B Enhancement Amount..................................$15,960,000
Series Servicing Fee Rate.......................................0.37% per annum
Series Termination Date.........................February 2001 Distribution Date
Series Issuance Date..........................................November 16, 1995
 
                                      I-8
<PAGE>
 
24. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1995-11
 
Group.......................................................................One
Class A Invested Amount............................................$625,000,000
Class B Invested Amount.............................................$40,000,000
Class A Certificate Rate..........................................Floating Rate
Class B Certificate Rate..........................................Floating Rate
Class A Expected Final Payment Date..................November 1998 Payment Date
Class B Expected Final Payment Date..................November 1998 Payment Date
Initial Shared Enhancement Amount...................................$33,250,000
Initial Class B Enhancement Amount..................................$13,300,000
Series Servicing Fee Rate.......................................0.37% per annum
Series Termination Date..............................November 2000 Payment Date
Series Issuance Date..........................................November 29, 1995
 
25. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1996-1
 
Group.......................................................................One
Class A Face Amount(1)...........................................$1,000,000,000
Class B Face Amount(1)..............................................$64,000,000
Class A Initial Invested Amount....................................$748,172,375
Class B Initial Invested Amount.....................................$47,532,597
Current Class A Invested Amount....................................$793,683,491
Current Class B Invested Amount.....................................$50,499,437
Class A Certificate Rate............................................Zero Coupon
Class B Certificate Rate............................................Zero Coupon
Class A Accretion Rate.......................................5.79069% per annum
Class B Accretion Rate......................................5.937664% per annum
Class A Expected Final Payment Date.............February 2001 Distribution Date
Class B Expected Final Payment Date.............February 2001 Distribution Date
Initial Shared Enhancement Amount...................................$53,200,000
Initial Class B Enhancement Amount..................................$21,280,000
Series Servicing Fee Rate.......................................0.37% per annum
Series Termination Date.........................February 2003 Distribution Date
Series Issuance Date...........................................January 29, 1996
 
26. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1996-2
 
Group.......................................................................One
Class A Invested Amount............................................$500,000,000
Class B Invested Amount.............................................$32,000,000
Class A Certificate Rate.......................................5.625% per annum
Class B Certificate Rate..........................................Floating Rate
Class A Expected Final Payment Date.....................March 2001 Payment Date
Class B Expected Final Payment Date.....................March 2001 Payment Date
Initial Shared Enhancement Amount...................................$26,600,000
Initial Class B Enhancement Amount..................................$10,640,000
Series Servicing Fee Rate.......................................0.37% per annum
Series Termination Date.................................March 2003 Payment Date
Series Issuance Date...............................................March 7,1996
- --------
(1) Indicates amount payable to the Certificateholders at maturity assuming,
    among other things, that (a) neither an Early Amortization Event nor an
    Accretion Termination Event occurs and (b) the monthly accretion amount
    with respect to each Class of Investor Certificates is fully funded each
    month prior to the Expected Final Payment Date for such Class.
 
                                      I-9
<PAGE>
 
27. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1996-3
 
Group........................................................................One
Class A Invested Amount.............................................$664,761,018
Class B Invested Amount..............................................$42,440,000
Class A Certificate Rate...........................................Floating Rate
Class B Certificate Rate...........................................Floating Rate
Class A Expected Final Payment Date........................May 1999 Payment Date
Class B Expected Final Payment Date...................May 1999 Distribution Date
Initial Shared Enhancement Amount....................................$35,360,051
Initial Class B Enhancement Amount...................................$14,144,020
Series Servicing Fee Rate........................................0.37% per annum
Series Termination Date....................................May 2001 Payment Date
Series Issuance Date................................................May 15, 1996
 
28. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1996-4
 
Group........................................................................One
Class A Invested Amount.............................................$675,082,698
Class B Invested Amount..............................................$43,200,000
Class A Certificate Rate...........................................Floating Rate
Class B Certificate Rate...........................................Floating Rate
Class A Expected Final Payment Date.....................August 2001 Payment Date
Class B Expected Final Payment Date................August 2001 Distribution Date
Initial Shared Enhancement Amount....................................$35,914,135
Initial Class B Enhancement Amount...................................$14,365,654
Series Servicing Fee Rate........................................0.37% per annum
Series Termination Date.................................August 2003 Payment Date
Series Issuance Date.............................................August 22, 1996
 
29. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1996-5
 
Group........................................................................One
Class A Invested Amount.............................................$750,000,000
Class B Invested Amount..............................................$48,000,000
Class A Certificate Rate...........................................Floating Rate
Class B Certificate Rate...........................................Floating Rate
Class A Expected Final Payment Date..................September 2003 Payment Date
Class B Expected Final Payment Date..................September 2003 Payment Date
Initial Shared Enhancement Amount....................................$39,900,000
Initial Class B Enhancement Amount...................................$15,960,000
Series Servicing Fee Rate........................................0.37% per annum
Series Termination Date..............................September 2005 Payment Date
Series Issuance Date.............................................August 29, 1996
 
                                      I-10
<PAGE>
 
30. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1996-6
 
Group........................................................................One
Class A Invested Amount.............................................$940,000,000
Class B Invested Amount..............................................$60,000,000
Class A Certificate Rate...........................................Floating Rate
Class B Certificate Rate...........................................Floating Rate
Class A Expected Final Payment Date...................December 2006 Payment Date
Class B Expected Final Payment Date...................December 2006 Payment Date
Initial Shared Enhancement Amount....................................$50,000,000
Initial Class B Enhancement Amount...................................$20,000,000
Series Servicing Fee Rate........................................0.37% per annum
Series Termination Date...............................December 2008 Payment Date
Series Issuance Date............................................December 3, 1996
 
31. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1997-1
 
Group........................................................................One
Class A Invested Amount.............................................$250,000,000
Class B Invested Amount..............................................$16,000,000
Class A Certificate Rate.........................................6.25% per annum
Class B Certificate Rate...........................................Floating Rate
Class A Expected Final Payment Date..............February 2000 Distribution Date
Class B Expected Final Payment Date..............February 2000 Distribution Date
Initial Shared Enhancement Amount....................................$13,300,000
Initial Class B Enhancement Amount....................................$5,320,000
Series Servicing Fee Rate........................................0.37% per annum
Series Termination Date..........................February 2002 Distribution Date
Series Issuance Date...........................................February 10, 1997
 
32. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1997-2
 
Group........................................................................One
Class A Invested Amount.............................................$750,000,000
Class B Invested Amount..............................................$48,000,000
Class A Certificate Rate.........................................6.55% per annum
Class B Certificate Rate.........................................6.70% per annum
Class A Expected Final Payment Date..............February 2002 Distribution Date
Class B Expected Final Payment Date..............February 2002 Distribution Date
Initial Shared Enhancement Amount....................................$39,900,000
Initial Class B Enhancement Amount...................................$15,960,000
Series Servicing Fee Rate........................................0.37% per annum
Series Termination Date..........................February 2004 Distribution Date
Series Issuance Date............................................January 28, 1997
 
                                      I-11
<PAGE>
 
33. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1997-3
 
Group........................................................................One
Class A Invested Amount.............................................$400,000,000
Class B Invested Amount..............................................$25,540,000
Class A Certificate Rate........................................6.839% per annum
Class B Certificate Rate....................................... 6.989% per annum
Class A Expected Final Payment Date......February 2002 Distribution Date Class B
Expected Final Payment Date......................February 2002 Distribution Date
Earliest Possible Initial Principal Payment Date......February 2000 Distribution
                                                                           Date
Initial Shared Enhancement Amount....................................$21,277,000
Initial Class B Enhancement Amount....................................$8,510,800
Series Servicing Fee Rate........................................0.37% per annum
Series Termination Date..........................February 2004 Distribution Date
Series Issuance Date...........................................February 10, 1997
 
                                      I-12
<PAGE>
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
 NO DEALER, SALESMAN OR ANY OTHER PERSON HAS BEEN AUTHORIZED TO GIVE ANY INFOR-
MATION OR TO MAKE ANY REPRESENTATIONS NOT CONTAINED OR INCORPORATED BY REFER-
ENCE IN THIS PROSPECTUS SUPPLEMENT OR THE ACCOMPANYING PROSPECTUS IN CONNECTION
WITH THE OFFER MADE BY THIS PROSPECTUS SUPPLEMENT AND THE ACCOMPANYING PROSPEC-
TUS AND, IF GIVEN OR MADE, SUCH INFORMATION OR REPRESENTATIONS MUST NOT BE RE-
LIED UPON. NEITHER THE DELIVERY OF THIS PROSPECTUS SUPPLEMENT NOR THE ACCOMPA-
NYING PROSPECTUS NOR ANY SALE MADE HEREUNDER AND THEREUNDER SHALL UNDER ANY
CIRCUMSTANCES CREATE ANY IMPLICATION THAT THERE HAS BEEN NO CHANGE IN THE AF-
FAIRS OF CITIBANK (SOUTH DAKOTA), N.A. OR CITIBANK (NEVADA), NATIONAL ASSOCIA-
TION OR IN THE RECEIVABLES OR THE ACCOUNTS SINCE THE DATE HEREOF. THIS PROSPEC-
TUS SUPPLEMENT AND THE ACCOMPANYING PROSPECTUS DO NOT CONSTITUTE AN OFFER OR
SOLICITATION BY ANYONE IN ANY STATE IN WHICH SUCH OFFER OR SOLICITATION IS NOT
AUTHORIZED OR IN WHICH THE PERSON MAKING SUCH OFFER OR SOLICITATION IS NOT
QUALIFIED TO DO SO OR TO ANYONE TO WHOM IT IS UNLAWFUL TO MAKE SUCH OFFER OR
SOLICITATION.
 
                                ---------------
 
                               TABLE OF CONTENTS
 
                             PROSPECTUS SUPPLEMENT
 
<TABLE>
<CAPTION>
                                                                           PAGE
                                                                           ----
<S>                                                                        <C>
Summary of Series Terms...................................................  S-3
The Credit Card Business of Citibank
 (South Dakota)........................................................... S-11
The Accounts.............................................................. S-14
The Banks................................................................. S-20
Supplemental Series Provisions............................................ S-21
Underwriting.............................................................. S-26
Legal Matters............................................................. S-28
Glossary Supplement....................................................... S-29
Annex I: Prior Issuances of Investor Certificates.........................  I-1
                                   PROSPECTUS
Available Information.....................................................    2
Reports to Certificateholders.............................................    2
Incorporation of Certain Documents by Reference...........................    2
Prospectus Summary........................................................    3
Special Considerations....................................................   13
The Banks.................................................................   21
Use of Proceeds...........................................................   21
The Trust.................................................................   21
Master Trust Provisions...................................................   22
Series Provisions.........................................................   28
The Pooling Agreement Generally...........................................   55
Certain Legal Aspects of the Receivables..................................   68
Tax Matters...............................................................   70
ERISA Considerations......................................................   74
Plan of Distribution......................................................   76
Legal Matters.............................................................   77
Glossary..................................................................   78
Annex I: Global Clearance, Settlement and Tax Documentation Procedures....  I-1
</TABLE>
 
 
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- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
                      CITIBANK CREDIT CARD MASTER TRUST I
 
                                  $750,000,000
  FLOATING RATE CLASS A CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1997-4
 
                                  $48,000,000
  FLOATING RATE CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1997-4
 
                         CITIBANK (SOUTH DAKOTA), N.A.
                              SELLER AND SERVICER
 
                    CITIBANK (NEVADA), NATIONAL ASSOCIATION
                                     SELLER
 
 
                         ----------------------------
 
                             PROSPECTUS SUPPLEMENT
                         ----------------------------
 
 
                    Underwriters of the Class A Certificates
                              GOLDMAN, SACHS & CO.
                                    CITIBANK
                           CREDIT SUISSE FIRST BOSTON
                              SALOMON BROTHERS INC
 
                    Underwriters of the Class B Certificates
                                    CITIBANK
                              GOLDMAN, SACHS & CO.
 
 
 
                            DATED FEBRUARY 12, 1997
 
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