SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549


                                    FORM 8-K

                                 Current Report


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

       Date of Report (Date of earliest event reported): October 27, 1999


                          CITIBANK (SOUTH DAKOTA), N.A.
                                  ON BEHALF OF
                       CITIBANK CREDIT CARD MASTER TRUST I
          (Issuer in respect of the Citibank Credit Card Master Trust I
      5.95% Class A Credit Card Participation Certificates, Series 1993-2
      6.15% Class B Credit Card Participation Certificates, Series 1993-2
      7.25% Class A Credit Card Participation Certificates, Series 1994-2
      7.50% Class B Credit Card Participation Certificates, Series 1994-2
      8.25% Class A Credit Card Participation Certificates, Series 1994-4
      8.25% Class A Credit Card Participation Certificates, Series 1995-1
      8.45% Class B Credit Card Participation Certificates, Series 1995-1
      7.85% Class A Credit Card Participation Certificates, Series 1995-3
      6.55% Class A Credit Card Participation Certificates, Series 1995-9
      6.65% Class B Credit Card Participation Certificates, Series 1995-9
  Zero Coupon Class A Credit Card Participation Certificates, Series 1996-1
  Zero Coupon Class B Credit Card Participation Certificates, Series 1996-1
 Floating Rate Class A Credit Card Participation Certificates, Series 1996-5
 Floating Rate Class B Credit Card Participation Certificates, Series 1996-5
 Floating Rate Class A Credit Card Participation Certificates, Series 1996-6
 Floating Rate Class B Credit Card Participation Certificates, Series 1996-6
     6.55% Class A Credit Card Participation Certificates, Series 1997-2
     6.70% Class B Credit Card Participation Certificates, Series 1997-2
     6.839% Class A Credit Card Participation Certificates, Series 1997-3
     6.989% Class B Credit Card Participation Certificates, Series 1997-3
 Floating Rate Class A Credit Card Participation Certificates, Series 1997-4
 Floating Rate Class B Credit Card Participation Certificates, Series 1997-4
  Zero Coupon Class A Credit Card Participation Certificates, Series 1997-6
  Zero Coupon Class B Credit Card Participation Certificates, Series 1997-6


                                                       [Cover page 1 of 2 pages]


<PAGE>

     6.35% Class A Credit Card Participation Certificates, Series 1997-7
     6.45% Class B Credit Card Participation Certificates, Series 1997-7
 Floating Rate Class A Credit Card Participation Certificates, Series 1997-8
 Floating Rate Class A Credit Card Participation Certificates, Series 1997-10
 Floating Rate Class B Credit Card Participation Certificates, Series 1997-10
     5.750% Class A Credit Card Participation Certificates, Series 1998-1
     5.875% Class B Credit Card Participation Certificates, Series 1998-1
      6.05% Class A Credit Card Participation Certificates, Series 1998-2
      6.20% Class B Credit Card Participation Certificates, Series 1998-2
      5.80% Class A Credit Card Participation Certificates, Series 1998-3
      5.95% Class B Credit Card Participation Certificates, Series 1998-3
      5.85% Class A Credit Card Participation Certificates, Series 1998-6
      6.00% Class B Credit Card Participation Certificates, Series 1998-6
  Floating Rate Class A Credit Card Participation Certificates, Series 1998-7
  Floating Rate Class B Credit Card Participation Certificates, Series 1998-7
       5.30% Class A Credit Card Participation Certificates, Series 1998-9
       5.55% Class B Credit Card Participation Certificates, Series 1998-9
       5.50% Class A Credit Card Participation Certificates, Series 1999-1
       5.75% Class B Credit Card Participation Certificates, Series 1999-1
      5.875% Class A Credit Card Participation Certificates, Series 1999-2
      6.150% Class B Credit Card Participation Certificates, Series 1999-2
   Floating Rate Class A Credit Card Participation Certificates, Series 1999-3
   Floating Rate Class B Credit Card Participation Certificates, Series 1999-3
       6.10% Class A Credit Card Participation Certificates, Series 1999-5
       6.30% Class B Credit Card Participation Certificates, Series 1999-5
                       (collectively, the "Certificates"))

               (Exact name of registrant as specified in charter)


    UNITED STATES OF AMERICA                            46-0358360

  (State or other jurisdiction             (I.R.S. Employer Identification No.)
        of incorporation)


                33-41055, 33-43576, 33-62180, 33-77802, 33-84834,
                        33-97664, 33-99328 and 333-38803

                            (Commission File Numbers)


     701 EAST 60TH STREET, NORTH
      SIOUX FALLS, SOUTH DAKOTA                                57117

  (Address of principal executive offices)                   (Zip Code)


       Registrant's telephone number, including area code: (605) 331-2626


                                 NOT APPLICABLE

          (Former name or former address, if changed since last report)


                                                       [Cover page 2 of 2 pages]


                                       2


<PAGE>

ITEM 5.  OTHER EVENTS.

      The information provided below is provided in respect of Citibank Credit
Card Master Trust I. Certain capitalized terms used herein are used as defined
in the Glossary of Terms at the end of this Report.

LOSS AND DELINQUENCY EXPERIENCE

      The following tables set forth the loss and delinquency experience for the
Accounts with respect to cardholder payments for each of the periods shown. For
the Loss Experience table 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 that 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. Neither the Banks
nor the Trust can provide any assurance that the loss and delinquency experience
for the Receivables in the future will be similar to the historical experience
set forth below.


                       Loss Experience for the Accounts(1)
                             (Dollars in Thousands)


                             Nine Months           Year Ended December 31,
                                Ended      -------------------------------------
                         September 30, 1999    1998         1997         1996
                             -----------   -----------  -----------  -----------
Average Principal
 Receivables Outstanding(2). $42,027,262   $36,082,462  $33,529,923  $31,225,337
Net Losses(3)...............  $1,518,966    $2,137,557   $2,099,096   $1,678,991
Net Losses as a Percentage
 of Average Principal
 Receivables Outstanding(4).       4.83%         5.89%        6.26%        5.38%
---------------
(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 first nine months of
    1999 were 89.88% and for each of the years ended December 31, 1998, 1997 and
    1996 were 91.56%, 92.49% and 92.46%, 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.

(4) The percentage for the nine months ended September 30, 1999 is an annualized
    number.


                                       3


<PAGE>

<TABLE>
<CAPTION>
                                 Delinquencies as a Percentage of the Accounts(1)(2)
                                               (Dollars in Thousands)

                                                                           As of December 31,
                              As of                   --------------------------------------------------------------
                        September 30, 1999               1998                      1997                     1996
                     ------------------------         ----------                ----------                ----------
Number of Days        Delinquent                Delinquent                Delinquent                Delinquent
Delinquent             Amount(1)  Percentage(2)  Amount(1)  Percentage(2)  Amount(1)  Percentage(2)  Amount(1)  Percentage(2)
--------------       -----------  -----------   ----------  -----------   ----------  -----------   ----------  -----------
<S>                  <C>               <C>      <C>               <C>     <C>               <C>     <C>               <C>
35-64 days........     $659,534        1.55%      $669,655        1.83%     $683,773        2.01%     $714,532        2.25%
65-94 days........      361,179        0.85        391,200        1.07       389,897        1.15       394,432        1.25
95 days or more...      681,390        1.60        701,872        1.92       699,696        2.06       687,988        2.17
                     -----------   ----------   ----------- ------------  ----------  ------------  ----------  -----------
 Total............   $1,702,103        4.00%    $1,762,727        4.82%   $1,773,366        5.22%   $1,796,952        5.67%
</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.


REVENUE EXPERIENCE

         The revenues for the Accounts from finance charges, fees paid by
cardholders and interchange for the nine months ended September 30, 1999 and for
each year of the three-year period ended December 31, 1998 are set forth in the
following table.

         The revenue experience in this 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.


                                       4


<PAGE>

                       Revenue Experience for the Accounts
                             (Dollars in Thousands)


                                 Nine Months       Year Ended December 31,
                                   Ended      ----------------------------------
                            September 30, 1999   1998        1997        1996
                                 ----------   ----------  ----------  ----------
Finance Charges and Fees Paid..  $5,497,287   $6,768,295  $6,189,383  $5,732,865
Average Revenue Yield (1)(2)...      17.49%       18.66%      18.46%      18.36%

-----------------------

(1)      Average Revenue Yield is the result of dividing Finance Charges and
         Fees Paid by Average Principal Receivables Outstanding during the
         periods indicated.

(2)      The percentage for the nine months ended September 30, 1999 is an
         annualized number.


         The revenues from 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 cardholders pay off their entire balance each month, thereby avoiding
periodic finance charges on their purchases)--and upon other card-related
services for which the cardholder pays a fee. 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
may specify that they will treat these fees as Finance Charge Receivables.
Revenues from periodic finance charges and fees also depend on the types of
charges and fees assessed on the Accounts. Accordingly, revenues will be
affected by future changes in the types of charges and fees assessed on the
Accounts and in the types of Additional Accounts added from time to time. These
revenues could be adversely affected by future changes in fees and charges
assessed by CBSD and other factors.

         CBSD 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. These changes have reduced the gross yield of the
Accounts.


                                       5


<PAGE>

CARDHOLDER MONTHLY PAYMENT RATES

         Monthly payment rates on the Receivables may vary because, among other
things, a cardholder may fail to make a required payment, may only make the
minimum required payment or may pay 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 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 CBSD may change).

                Cardholder Monthly Payment Rates for the Accounts

                             Nine Months           Year Ended December 31,
                               Ended            ----------------------------
                         September 30, 1999      1998       1997       1996
                           --------------       ------     ------     ------
Lowest Month.............      20.66%           19.15%     18.00%     17.65%
Highest Month............      22.47%           22.31%     21.98%     21.05%
Average of the Months
 in the Period...........      21.53%           21.06%     19.92%     19.39%


THE RECEIVABLES

         The Receivables in the Accounts as of September 25, 1999 included
$637,287,573 of Finance Charge Receivables and $44,602,817,522 of Principal
Receivables (which amounts include overdue Finance Charge Receivables and
overdue Principal Receivables). As of September 25, 1999, there were 36,241,660
Accounts. Included within the Accounts are inactive Accounts that have no
balance. The Accounts had an average Principal Receivable balance of $1,231 and
an average credit limit of $5,590.


                                       6


<PAGE>

The average total Receivable balance in the Accounts as a percentage of the
average credit limit with respect to the Accounts was 22%. Approximately 84% of
the Accounts were opened prior to September 1997. Of the Accounts, approximately
13.56% related to cardholders with billing addresses in California, 10.75% in
New York, 6.62% in Texas and 5.71% in Florida. Not more than 5% of the Accounts
related to cardholders having billing addresses in any other single state.

         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 12.9%. As of the
most recent quarterly reset date, the periodic finance charge on balances in
most accounts ranged from 13.65% to 21.15%. CBSD may change the periodic finance
charge on accounts at any time by written notice to the cardholders. Any
increase in such finance charge 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). CBSD 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 CBSD generally.

         The Accounts consist of Eligible Accounts. The Banks may, 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 $34.99 billion of Principal Receivables.

         The following tables summarize the Accounts by various criteria as of
September 25, 1999. References to "Receivables Outstanding" in these 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.


                                       7


<PAGE>

                   Composition of Accounts by Account Balance

                                            Percentage               Percentage
                                             of Total                 of Total
                                 Number of   Number of  Receivables  Receivables
       Account Balance           Accounts    Accounts   Outstanding  Outstanding
  --------------------------    ----------  ----------  ------------ -----------
Credit Balance(1)..............    328,459     0.91%    $(72,532,316)    (0.16)%
No Balance(2).................. 19,124,177     52.77                0     0.00
Less than or equal to $500.00..  3,939,135     10.87      772,083,701     1.71
$500.01 to $1,000.00...........  2,104,843     5.81     1,561,248,338     3.45
$1,000.01 to $2,000.00.........  3,017,406     8.33     4,442,551,059     9.82
$2,000.01 to $3,000.00.........  2,066,476     5.70     5,115,038,163    11.31
$3,000.01 to $4,000.00.........  1,480,312     4.08     5,150,960,669    11.39
$4,000.01 to $5,000.00.........  1,272,080     3.51     5,737,936,140    12.68
$5,000.01 to $6,000.00.........    935,906     2.58     5,128,869,937    11.34
$6,000.01 to $7,000.00.........    625,027     1.72     4,044,389,712     8.94
$7,000.01 to $8,000.00.........    420,159     1.16     3,141,132,603     6.94
$8,000.01 to $9,000.00.........    284,660     0.79     2,411,065,382     5.33
$9,000.01 to $10,000.00........    204,543     0.56     1,939,910,864     4.29
Over $10,000.00................    438,477     1.21     5,867,450,843    12.96
                                ----------   -------  ---------------   -------
     Total..................... 36,241,660   100.00%  $45,240,105,095   100.00%

----------------------
(1)  Credit balances are a result of cardholder payments and credit adjustments
     applied in excess of an Account's unpaid balance. Accounts which have a
     credit balance are included because Receivables may be generated in these
     Accounts in the future.

(2)  Accounts which have no balance are included because Receivables may be
     generated in these Accounts in the future.


                     Composition of Accounts by Credit Limit

                                           Percentage                Percentage
                                            of Total                  of Total
                                 Number of  Number of  Receivables   Receivables
         Credit Limit            Accounts   Accounts   Outstanding   Outstanding
  -----------------------------  ---------  --------- -------------- -----------
Less than or equal to $500.00..  2,354,689    6.50%      $82,860,711     0.18%
$500.01 to $1,000.00...........  2,229,799    6.15       456,509,397     1.01
$1,000.01 to $2,000.00.........  4,544,607   12.54     1,979,632,661     4.38
$2,000.01 to $3,000.00.........  3,654,479   10.08     2,482,288,432     5.49
$3,000.01 to $4,000.00.........  2,729,280    7.53     2,454,504,988     5.43
$4,000.01 to $5,000.00.........  4,093,315   11.29     4,417,703,727     9.77
Over $5,000.00................. 16,635,491   45.91    33,366,605,179    73.74
                                ----------  ------   ---------------   -------
     Total..................... 36,241,660  100.00%  $45,240,105,095   100.00%


                                       8


<PAGE>

                    Composition of Accounts by Payment Status

                                       Percentage                   Percentage
                                        of Total                     of Total
                            Number of   Number of    Receivables    Receivables
     Payment Status         Accounts    Accounts     Outstanding    Outstanding
     --------------         ----------  ---------  ---------------  ------------
Current(1)................. 34,936,363    96.40%   $41,209,836,863     91.09%
Up to 34 days delinquent...    778,001     2.15      2,328,165,693      5.15
35 to 64 days delinquent...    229,552     0.63        659,534,317      1.46
65 to 94 days delinquent...    106,419     0.29        361,178,589      0.80
95 to 124 days delinquent..     82,976     0.23        281,735,343      0.62
125 to 154 days delinquent.     62,554     0.17        222,330,703      0.49
155 to 184 days delinquent.     45,795     0.13        177,323,587      0.39
                            ----------   -------   ---------------    -------
     Total................. 36,241,660   100.00%   $45,240,105,095    100.00%

---------------------

(1)  Includes Accounts on which the minimum payment has not been received before
     the next billing date following the issuance of the related bill.


                         Composition of Accounts by Age

                                            Percentage               Percentage
                                            of Total                  of Total
                                 Number of  Number of   Receivables  Receivables
          Age                    Accounts   Accounts    Outstanding  Outstanding
        -------                  ---------  ---------  --------------  ---------
Less than or equal to 6 months.  1,530,026    4.22%    $2,825,739,428    6.25%
Over 6 months to 12 months.....  1,941,514    5.36      3,192,132,416     7.06
Over 12 months to 24 months....  2,379,961    6.57      3,165,251,809     7.00
Over 24 months to 36 months....  2,434,205    6.72      2,841,146,962     6.28
Over 36 months to 48 months....  3,041,861    8.39      3,512,939,615     7.76
Over 48 months................. 24,914,093   68.74     29,702,894,865    65.65
                                ----------  -------   ---------------   -------
     Total..................... 36,241,660  100.00%   $45,240,105,095   100.00%


                                       9


<PAGE>

                                GLOSSARY OF TERMS

"Accounts" means the portfolio of revolving credit card accounts established and
supplemented in accordance with the Pooling Agreement.

"Additional Accounts" consist of newly originated Eligible Accounts to be
included as Accounts and Accounts relating to any Lump Sum Additions.

"Banks" means Citibank (South Dakota), N.A., a national banking association, and
Citibank (Nevada), National Association, a national banking association.

"CBSD" means Citibank (South Dakota), N.A.

"Eligible Accounts" An "Eligible Account" is defined to mean a credit card
account owned by CBSD which, as of the Trust Cut-Off Date with respect to an
Initial Account or as of the additional cut-off date with respect to an
Additional Account: (a) is in existence and maintained by CBSD; (b) is payable
in United States dollars; (c) in the case of the Initial Accounts, has a
cardholder who has provided, as his most recent billing address, an address
located in the United States or its territories or possessions or a military
address; (d) has a cardholder who has not been identified by CBSD in its
computer files as being involved in a voluntary or involuntary bankruptcy
proceeding; (e) has not been identified as an Account with respect to which the
related card has been lost or stolen; (f) has not been sold or pledged to any
other party; (g) does not have receivables which have been sold or pledged to
any other party; and (h) in the case of the Initial Accounts, is a VISA or
MasterCard revolving credit card account.

"Finance Charge Receivables" consist of all periodic finance charges, annual
membership fees, cash advance fees and late charges on amounts charged for
merchandise and services and certain other fees designated by the Banks. In
addition, certain Interchange attributed to cardholder charges for merchandise
and services in the Accounts will be treated as Finance Charge Receivables.

"Interchange" means interchange fees payable to Citibank (South Dakota) or any
additional seller, in its capacity as credit card issuer, through VISA,
Mastercard or any other similar entity or organization with respect to any other
type of revolving credit card accounts included as Accounts (except as otherwise
provided in the initial Assignment with respect to any such other type of
Accounts), in connection with cardholder charges for goods and services.

"Investor Certificates" means the Credit Card Participation Certificates issued
by the Trust.

"Lump Sum Addition" means the designation of additional Eligible Accounts to be
included as Accounts pursuant to Section 2.09(a) or (b) of the Pooling
Agreement.

"Pooling Agreement" means the Pooling and Servicing Agreement dated as of May
29, 1991 among the Banks and the Trustee, including all amendments thereto.

"Principal Receivables" consist of all amounts charged by cardholders for
merchandise and services, amounts advanced to cardholders as cash advances and
certain fees billed to cardholders on the Accounts.

"Receivables" means all amounts shown on the Servicer's records as amounts
payable by the person or persons obligated to make payments with respect to the
Accounts.

"Receivables Outstanding" as defined on page 7.

"Series Supplement" means any series supplement to the Pooling Agreement
executed in connection with the original issuance of a series of Investor
Certificates pursuant to Section 6.03 of the Pooling Agreement.

"Trust" means Citibank Credit Card Master Trust I (formerly known as Standard
Credit Card Master Trust I).

"Trustee" means Bankers Trust Company, as successor to Yasuda Bank and Trust
Company (U.S.A.).


                                       10


<PAGE>

                                   SIGNATURES

               Pursuant to the requirements of the Securities Exchange Act of
1934, the registrant has duly caused this report to be signed on its behalf by
the undersigned thereunto duly authorized.

                                     CITIBANK (SOUTH DAKOTA), N.A.,
                                       as Servicer
                                       (Registrant)


                                     By: /s/ Eugene D. Rowenhorst
                                         -------------------------
                                             Eugene D. Rowenhorst
                                             Senior Vice President


Dated: October 27, 1999