WMATA Implements BASE24-eps to Enhance Debit and Credit Card Processing from Automated Ticketing Network

ACI Worldwide (NASDAQ:TSAI), a leading international provider of software for electronic payment systems, today announced that the Washington Metropolitan Area Transit Authority (WMATA) has implemented BASE24-eps™ to enhance the processing and routing of debit and credit card transactions originating from WMATA’s ticketing machines in the Washington, D.C., metropolitan area. "The flexibility and scalability of BASE24-eps allows WMATA to easily add other transit systems to our network, such as the Maryland Transit Authority (MTA), which we plan to add later this year,” said Chris Cipperly, assistant treasurer, Office of the Treasurer Department of Finance at WMATA. "Our debit and credit transactions are routed and processed much more efficiently than before, which has benefited both WMATA and our customers.” WMATA’s previous system processed record transaction volumes in recent months as the use of debit and credit cards increased. With BASE24-eps, WMATA has greater flexibility in routing and processing card payments, as well as improved real-time transaction management and monitoring. The increased online management capability of BASE24-eps enables WMATA to monitor card traffic, help detect fraudulent transactions and reduce its overall network operation costs. BASE24-eps represents the next-generation of ACI’s world-class payments software and provides an integrated solution for multichannel transaction acquiring, authentication, routing, switching and authorization. BASE24-eps supports traditional debit and credit card transactions as well as mobile commerce Internet banking. "We are excited to have WMATA as a BASE24-eps customer,” said Tom Houghton, vice president of U.S. Global Services at ACI. "The success of BASE24-eps at WMATA is one more example of the solution’s power and flexibility.” About WMATA The Washington Metropolitan Area Transit Authority (WMATA) is an interstate compact agency authorized by Congress and is an instrumentality of the District of Columbia, State of Maryland, and the Commonwealth of Virginia. The agency is charged with providing a comprehensive mass transit system to the Washington Metropolitan Region and operates a 106 miles subway system as well as 1500 bus fleet. WMATA is the lead agency in providing Smartcard clearing and settlement for all of the major transit providers in the Washington, Maryland, and Virginia corridor. Currently, the region has an installed card base of over 2.3 million contactless SmarTrip cards. The region expects credit/debit transactions to become an increasingly important method of payment in the public transit sector. 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 retail banking, wholesale banking and cross-industry systems. ACI serves more than 800 customers in 84 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 May 11, 2007.