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): January 27, 2000


                          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
     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
       6.65% Class A Credit Card Participation Certificates, Series 1999-7
       6.90% Class B Credit Card Participation Certificates, Series 1999-7
                       (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)


                                                Year Ended December 31,
                                            -------------------------------
                                            1999           1998        1997
                                         ----------      --------    ---------
Average Principal
 Receivables Outstanding(2)........     $42,641,990    $36,082,462   $33,529,923

Net Losses(3)......................      $2,009,133     $2,137,557    $2,099,096

Net Losses as a Percentage
 of Average Principal
 Receivables Outstanding...........           4.71%          5.89%         6.26%
---------------
(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 each of the years ended
    December 31, 1999, 1998 and 1997 were 89.80%, 91.56% and 92.49%,
    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.


                                       3


<PAGE>

               Delinquencies as a Percentage of the Accounts(1)(2)
                             (Dollars in Thousands)


                                      As of December 31,
                 ---------------------------------------------------------------
                        1999                   1998                 1997
                 -------------------   --------------------  -------------------

Number of Days   Delinquent  Percent-  Delinquent  Percent-  Delinquent Percent-
Delinquent        Amount(1)   age(2)    Amount(1)   age(2)    Amount(1)  age(2)
--------------  -----------  --------  ----------  --------  ---------- --------

35-64 days......  $705,753    1.63%      $669,655   1.83%     $683,773   2.01%
65-94 days......   379,166    0.88        391,200   1.07       389,897   1.15
95 days or more.   721,337    1.67        701,872   1.92       699,696   2.06
                ----------   --------  ----------  --------  ---------- ------
 Total......... $1,806,256    4.18%    $1,762,727   4.82%    $1,773,366  5.22%

---------------
(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  each  year of the  three-year  period  ended
December 31, 1999 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)


                                                Year Ended December 31,
                                      ------------------------------------------
                                         1999            1998            1997
                                      ----------      ----------      ----------
Finance Charges and Fees Paid...      $7,430,599      $6,768,295      $6,189,383
Average Revenue Yield (1).......         17.43%          18.66%           18.46%

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

      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


                                                  Year Ended December 31,
                                           -----------------------------------
                                            1999           1998          1997
                                           ------         ------        ------
Lowest Month..........................     20.66%         19.15%        18.00%
Highest Month.........................     22.57%         22.31%        21.98%
Average of the Months in the Period...     21.54%         21.06%        19.92%

THE RECEIVABLES

      The  Receivables  in  the  Accounts  as  of  December  25,  1999  included
$650,605,076  of Finance Charge  Receivables  and  $46,547,973,964  of Principal
Receivables  (which  amounts  include  overdue  Finance Charge  Receivables  and
overdue Principal  Receivables).  As of December 25, 1999, there were 36,930,928
Accounts.  Included  within the  Accounts  are  inactive  Accounts  that have no
balance.  The Accounts had an average Principal Receivable balance of $1,260 and
an average credit limit of $5,614.


                                       6


<PAGE>

The average  total  Receivable  balance in the Accounts as a  percentage  of the
average credit limit with respect to the Accounts was 23%.  Approximately 84% of
the Accounts were opened prior to December 1997. Of the Accounts,  approximately
13.58% related to cardholders  with billing  addresses in California,  10.68% in
New York, 6.64% in Texas and 5.75% 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
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  for
purchases  ranged from 13.9% to 21.4%.  The periodic  finance charge assessed on
balances in most accounts for cash advances is currently 19.99%. 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
December 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)..............    297,348     0.81%     $(68,917,640)   (0.15)%
No Balance(2).................. 19,755,748    53.50                 0     0.00
Less than or equal to $500.00..  3,789,692    10.26       754,184,526     1.60
$500.01 to $1,000.00...........  2,090,987     5.66     1,552,325,919     3.29
$1,000.01 to $2,000.00.........  3,008,011     8.14     4,429,193,325     9.38
$2,000.01 to $3,000.00.........  2,091,916     5.66     5,180,509,830    10.98
$3,000.01 to $4,000.00.........  1,514,123     4.10     5,269,807,582    11.17
$4,000.01 to $5,000.00.........  1,293,360     3.50     5,832,684,772    12.36
$5,000.01 to $6,000.00.........    963,459     2.61     5,279,486,345    11.19
$6,000.01 to $7,000.00.........    658,478     1.78     4,261,735,634     9.03
$7,000.01 to $8,000.00.........    445,058     1.21     3,327,192,440     7.05
$8,000.01 to $9,000.00.........    306,477     0.83     2,595,816,394     5.50
$9,000.01 to $10,000.00........    220,077     0.60     2,087,285,365     4.42
Over $10,000.00................    496,194     1.34     6,697,274,548    14.18
                                ----------   -------  ---------------   --------
     Total..................... 36,930,928   100.00%  $47,198,579,040   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..  2,536,192    6.87%      $89,479,267    0.19%
$500.01 to $1,000.00...........  2,231,417    6.04       444,356,178    0.94
$1,000.01 to $2,000.00.........  4,524,860   12.25     1,902,989,121    4.03
$2,000.01 to $3,000.00.........  3,687,874    9.99     2,451,507,766    5.19
$3,000.01 to $4,000.00.........  2,810,443    7.61     2,491,516,440    5.28
$4,000.01 to $5,000.00.........  4,128,823   11.18     4,376,246,052    9.27
Over $5,000.00................. 17,011,319   46.06    35,442,484,216   75.10
                                ----------  ------   ---------------  -------
     Total..................... 36,930,928  100.00%  $47,198,579,040  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)................. 35,578,238    96.33%   $42,984,172,030     91.07%
Up to 34 days delinquent...    797,178     2.16      2,408,150,679      5.10
35 to 64 days delinquent...    246,954     0.67        705,753,424      1.50
65 to 94 days delinquent...    109,632     0.30        379,166,136      0.80
95 to 124 days delinquent..     87,597     0.24        302,913,258      0.64
125 to 154 days delinquent.     65,582     0.18        239,005,904      0.51
155 to 184 days delinquent.     45,747     0.12        179,417,609      0.38
                            ----------   -------   ---------------    -------
     Total................. 36,930,928   100.00%   $47,198,579,040    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.  1,479,009    4.00%    $2,418,288,577    5.12%
Over 6 months to 12 months.....  1,873,782    5.07      3,134,694,411    6.64
Over 12 months to 24 months....  2,737,044    7.41      3,876,532,737    8.21
Over 24 months to 36 months....  2,377,479    6.44      3,018,919,228    6.40
Over 36 months to 48 months....  2,675,754    7.25      3,088,588,103    6.54
Over 48 months................. 25,787,860   69.83     31,661,555,984   67.09
                                ----------  -------   ---------------  -------
     Total..................... 36,930,928  100.00%   $47,198,579,040  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: January 27, 2000