ANZ New Zealand Re-Commits To ACI And BASE24.

Business Editors/High-Tech Writers

OMAHA, Neb.--(BUSINESS WIRE)--Nov. 17, 2003

ACI Worldwide (Nasdaq:TSAI), a leading international provider of enterprise e-payment solutions, today announced that ANZ Banking Group (New Zealand) Limited has renewed its BASE24(R) application software licensing for a term of 5 years commencing October 1, 2003.

BASE24 provides the payments engine front end processing for all ANZ New Zealand EFTPOS and ATM network transactions. The ANZ New Zealand network comprises approximately 400 ATM's and more than 31,000 merchant EFTPOS devices.

"ANZ currently process approximately 25% of New Zealand's credit and debit card transactions, and we anticipate continued growth in transaction volumes over the next few years" said Peter Donald, General Manager - Strategic Sourcing at ANZ. "BASE24 has served us well for many years and we are delighted to reaffirm our confidence in ACI's proven payment solutions. BASE24 provides the functionality and flexibility to address both our current and projected business requirements."

"We greatly value our long standing relationship with ANZ" said Don McLarty, ACI's Vice President and Managing Director of Asia/Pacific operations. "ACI maintains a comprehensive portfolio of function rich retail payment solutions which provide the bank with the opportunity to respond quickly and effectively to evolving market conditions".

"ANZ New Zealand has also entered into a 5 year agreement with Hewlett Packard to upgrade its HP NonStop(TM) servers to maintain a robust, high performance and continuously available environment. ANZ New Zealand recently upgraded to S7600 servers."

About ACI Worldwide

Every second of every day, consumers are initiating electronic payment transactions accessing their cash at ATMs, using debit and credit cards to make purchases in stores and on the Internet, banking by phone and PC, paying bills online. Over 30 billion times a year, ACI software is used to process these transactions, powering the world's online payment systems. ACI was founded in 1975 and pioneered the development of applications and networking software for online transaction processing. Today more than 500 customers in 73 countries use ACI supplied software. Visit ACI Worldwide on the Internet at www.aciworldwide.com.

Any statements in this press release regarding projected results are preliminary and "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. In addition, this press release may contain other forward-looking statements including statements regarding Transaction Systems Architects, Inc.'s ("TSA"), its subsidiaries or third parties' expectations, predictions, views, opportunities, plans, strategies, beliefs, and statements of similar effect. The forward-looking statements in this press release are subject to a variety of risks and uncertainties. Actual results could differ materially.

For a detailed discussion of these and other risk factors, interested parties should review the Company's filings with the Securities and Exchange Commission, including the Company's Form 10-K filed on January 13, 2003, the Company's Form 10-Q filed on February 13, 2003, the Company's Form 10-Q filed on May 15, 2003, the Company's Form 10-Q filed on August 14, 2003, and the Company's Form 8-K filed on October 28, 2003.