AMERICARD SERVICES ENHANCES AUTHENTICATION SERVICES VIA ACI SECURE COMMERCE SOFTWARE

AmeriCard taps ACI’s server solution to offer its customers Verified by Visa authentication services.

(OMAHA, Neb. — August 20, 2003) — ACI Worldwide (Nasdaq: TSAI), a leading international provider of enterprise e-payment solutions, today announced that AmeriCard Services, Inc. now offers Verified by Visa authentication services supported by ACI’s software. Through ACI’s issuer authentication software, AmeriCard issuer clients will conduct business using the added safety and reassurance of Visa’s secure authentication and enrollment services.

Verified by Visa allows a consumer to add a personal password to their Visa card and use that password for authentication when making purchases at participating online stores. The service guarantees merchant payment and allows merchants to eliminate the cost of online fraud.

“With Internet commerce on the rise, we wanted to provide a solution enabling card issuers to promote Verified by Visa secure shopping with their cardholders,” said Nancy Linxwiler, Director of Business Research at AmeriCard Services. “ACI’s solution allows us to offer secure enrollment and authentication services. It is a great addition to our risk management services.”

ACI’s secure authentication service is designed to promote consumer confidence in shopping on the Internet through increased security of their confidential card and password information. Through the exchange of consumer created text messages, consumers will be assured they are interacting with their financial institution by the exchange of confidential data they shared with their financial institution.

“With ACI’s secure authentication solution, processors like AmeriCard not only have a solution that supports Internet access, they also have a framework to support a wide array of multi-channel consumer access points including mobile devices such as PDAs,” said Mark Vipond, president of ACI Worldwide. “ACI is a long-time Visa payments partner and the products in our secure commerce suite provide issuers with an integrated payment platform to meet the unique challenges of conducting commerce over public networks.”

AmeriCard Services, Inc. is new to the ACI customer family. AmeriCard is a privately owned corporation that provides pass-through card processing services to financial institutions that issue Visa and MasterCard credit and debit cards.

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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 72 countries use ACI supplied software. Visit ACI Worldwide on the Internet at www.aciworldwide.com

About AmeriCard Services, Inc.
AmeriCard is a privately owned corporation that provides Pass-Through Card Processing services to financial institutions that process their Visa and/or MasterCard programs in-house. AmeriCard has been providing these credit and debit card processing services since 1994 and serves financial institutions from coast to coast. Using AmeriCard`s Pass-Through Card Processing service, financial institutions benefit from the integration and control that in-house card programs offer.

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 and the Company’s Form 10-Q filed on May 15, 2003.