Transaction Systems Architects Provides Options Review Progress Update and Schedules Investor Call for March 12, 2007.

NEW YORK -- Transaction Systems Architects, Inc. (Nasdaq:TSAI), today announced the expected schedule for completing its voluntary review of historical stock option grants, and has scheduled an investor call for March 12, 2007.

The independent review of historical stock options grants by the Company's Audit Committee and outside advisors continues. Based on progress made to date, the Company presently expects the review to be completed and its Annual Report on Form 10-K for the 2006 fiscal year to be filed by the end of March 2007. However, the Company is working to progress the review as much as possible prior to its next regularly scheduled Board of Directors meeting, scheduled for March 6-7, 2007.

Based on this updated schedule, the Company will hold an investor call at 4:00 pm EDT Monday, March 12, 2007 to update investors regarding the status of the options review and regulatory filings and other corporate matters. Interested persons may access a real-time audio broadcast of the teleconference at www.tsainc.com/investors.

Non Reliance on Prior Financial Communications

On October 27, 2006, the Company announced that its financial statements and all earnings releases and similar communications relating to financial periods since fiscal year 1995 should not be relied upon in light of the stock option review the Company has undertaken. Subject to completion of the stock option review and a determination of the financial statement impact, including the need to restate any historical financial statements, the Company presently expects to provide appropriate disclosure in its 2006 Form 10-K to reflect any and all such restatements.

About Transaction Systems Architects, Inc.

The Company's software facilitates electronic payments by providing consumers and companies access to their money. Its products are used to process transactions involving credit cards, debit cards, secure electronic commerce, mobile commerce, smart cards, checks, high-value money transfers, bulk payment clearing and settlement, and enterprise e-infrastructure. The Company's solutions are used by over 800 customers in 83 countries on six continents.

Forward-Looking Statements

This press release contains forward-looking statements based on current expectations that involve a number of risks and uncertainties. Generally, forward-looking statements do not relate strictly to historical or current facts and may include words or phrases such as the Company "believes," "will", "expects," "looks forward to," and words and phrases of similar impact, and include but are not limited to statements regarding the timing of completing the review of its historical stock option practices and the filing of its Annual Report on Form 10-K for the year ended September 30, 2006.

The forward-looking statements are made pursuant to safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Forward-looking statements in this press release include, but are not limited to, statements regarding the:

* Company's expectations regarding the timing of completing the review of its historical stock option practices;

* Company's expected timing regarding completion of the audit of its 2006 consolidated financial statements and the filing of its Annual Report on Form 10-K; and

* Company's expectation to include the effects of any restatements in its 2006 Form 10-K.

Any or all of the forward-looking statements may turn out to be wrong. They can be affected by the judgments and estimates underlying such assumptions or by known or unknown risks and uncertainties. Many of these factors will be important in determining the Company's actual future results. These factors include, without limitation, the risk that additional information may arise from the preparation of the Company's financial statements or other subsequent events that would require the Company to make additional adjustments than those previously disclosed. Consequently, no forward-looking statement can be guaranteed. Actual future results may vary materially from those expressed or implied in any forward-looking statements. In addition, the Company disclaims any obligation to update any forward-looking statements after the date of this release.

All of the foregoing forward-looking statements are expressly qualified by the risk factors discussed in the Company's filings with the Securities and Exchange Commission. For a detailed discussion of these risk factors, parties that are relying on the forward-looking statements should review the Company's filings with the Securities and Exchange Commission, including the Company's Form 10-K filed on December 14, 2005, the Company's Form 10-Q filed on February 9, 2006, the Company's Form 10-Qs filed on May 10, 2006 and August 9, 2006 and specifically the section entitled "Factors That May Affect the Company's Future Results or the Market Price of the Company's Common Stock."