8-K

                                  UNITED STATES
                       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: March 5, 2003
                        (Date of earliest event reported)


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



                      TRANSACTION SYSTEMS ARCHITECTS, INC.
             (Exact name of registrant as specified in its charter)



          Delaware                   0-25346                     47-0772104
(State or other jurisdiction       (Commission                (I.R.S. Employer
      of incorporation)            File Number)              Identification No.)


                             224 South 108th Avenue,
                              Omaha, Nebraska 68154
          (Address of principal executive offices, including zip code)


                                 (402) 334-5101
              (Registrant's telephone number, including area code)


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







Item 5.  Other Events.

     On March 5, 2003, Transaction Systems Architects, Inc. issued a reminder
notice to its Directors and Executive Officers that March 20th is the beginning
of the Company's Stock Trading Black-Out Period for the current quarter,
continuing through and including the third business day after the quarter's
financial results have been publicly released. This notice reminds the Company's
Directors and Executive Officers that they are not permitted to buy or sell any
of the Company's stock, including shares held within the Company's 401(k) Plan,
during the Stock Trading Black-Out Period.


Item 7.  Financial Statements and Exhibits.

         (c)  Exhibits.

        99.1  Reminder Notice to Directors and Executive Officers
              dated March 5, 2003.






                                    SIGNATURE

     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 hereunto duly authorized.


                                         TRANSACTION SYSTEMS ARCHITECTS, INC.


 Date: March 5, 2003                     By:       /s/ Dwight G. Hanson
                                            ------------------------------------
                                                     Dwight G. Hanson
                                             Chief Financial Officer, Treasurer
                                                 and Senior Vice President








                                  EXHIBIT INDEX

  Exhibit
  Number      Description

    99.1      Reminder Notice to Directors and Executive Officers
              dated March 5, 2003

EX-99

                                                                    Exhibit 99.1


March 5, 2003


                   REMINDER TO DIRECTORS & EXECUTIVE OFFICERS

Thursday, March 20th, is the beginning of the Stock Trading Black-Out Period for
the current quarter. This Trading Black-Out Period will continue through and
include the third business day after the quarter's financial results have been
publicly released. An E-mail message will be sent to notify you of the end of
the Stock Trading Black-Out Period.

Directors & Executive Officers are not permitted to buy or sell any of the
Company's stock, however acquired, during the Trading Black-Out Period. Please
refer to the "Policies and Guidelines on Trading, Reporting and Disclosure"
booklet for more information.

Transaction Systems Architects, Inc.
Attention: Corporate Programs
224 South 108th Avenue
Omaha, Nebraska 68154
phone: (402) 334-5101