ACI Wholesale Payments System Earns Ninth Consecutive SWIFTReady Gold Accreditation.

OMAHA, Neb. -- ACI Worldwide (Nasdaq:TSAI), a leading international provider of enterprise payment solutions, today announced its market-leading ACI Wholesale Payments System(TM) has received the SWIFTReady Gold accreditation for Payments for the ninth consecutive year. The Gold Label, SWIFT's highest accreditation, recognizes that the Wholesale Payments System satisfies all SWIFT requirements and is testament to ACI's continued support and commitment to SWIFT's standards, products and services.

"Since the inception of the accreditation programme, ACI Worldwide has consistently been recognized as achieving the SWIFTReady Gold certification with its Wholesale Payments System solution," said Joel Ludvigsen, director of partner solutions at SWIFT. "It is with great pleasure that we recognise, for the ninth consecutive year, the Company's commitment to satisfying the standards set forth by SWIFT."

SWIFT, the Society for Worldwide Interbank Financial Telecommunication, supplies secure messaging services and interface software to wholesale financial entities. Third-party financial applications, like the ACI Wholesale Payments System, are either awarded SWIFTReady Silver or SWIFTReady Gold labels, depending on their level of compliance. The SWIFTReady accreditation certifies that Wholesale Payments System satisfied all SWIFT requirements across a wide range of criteria that are SWIFT-specific and re-evaluated on a yearly basis. The labeling also confirms that the Wholesale Payments System can be fully integrated into a SWIFT messaging environment.

The ACI Wholesale Payments System is a multi-bank and multi-currency global payments processing and risk management system that provides continuous processing capabilities, 24 hours a day. With interfaces to SWIFT - as well as Fedwire, CHIPS, telex carriers, Fed Book Entry Securities and many international RTGS networks - the system is a single, integrated solution for domestic and international payments processing. The ACI Wholesale Payments System for SEPA supports processing for prieuro, credeuro, and Pan-European direct debits.

"ACI Worldwide understands the importance of our customers having access to the most current technologies, and we pride ourselves on providing them with a strong framework for their payments processing," said Robert Cronin, vice president payment systems, ACI Worldwide. "The highest level of accreditation from SWIFT only enforces that philosophy, and we are proud to have earned the SWIFT seal of approval each year since the onset of the program."

About ACI Worldwide

Every second of every day, ACI solutions are at work processing electronic payments, managing risk, automating back office systems and providing application infrastructure services. Founded in 1975, ACI is a leading international provider of solutions for consumer and wholesale banking, retail and cross-industry systems. ACI serves more than 800 customers in 83 countries including many of the world's largest financial institutions, retailers and payment processors. 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 December 14, 2005 and the Company's 10-Q filed on February 9, 2006.