Mellon Financial Selects ACI Software for Online Banking Convergence

Business Wire, June 6, 2007

ACI Solution Offers Front End Online Banking Consolidation with Back End Integration

OMAHA, Neb. -- ACI Worldwide (NASDAQ:TSAI), a leading international provider of software for electronic payment systems, today announced that Mellon Financial Corporation has licensed ACI Enterprise Banker([TM]) software to consolidate their retail and commercial web banking systems under a single online banking product. Mellon will leverage ACI's On Demand hosted services environment to integrate Enterprise Banker with the company's core portal application, offering Mellon's clients an easy-to-use single sign-on experience.

"Consolidation of our front end online banking solutions requires a flexible and scalable solution, and we are confident that Enterprise Banker will deliver," said Tim Tully, chief operating officer of Mellon's Private Wealth Management group. "After extensive analysis, we chose ACI based on their expertise and their unique ability to provide the breadth of functionality needed to service our broad spectrum of clients, from consumers to our largest and most demanding corporate clients in a hosted systems environment. The ability of Enterprise Banker to consolidate multiple solutions into a single product plays directly into our strategy to deliver our services more efficiently."

"Mellon recognized the efficiencies that could be gained by implementing a single product across retail and commercial markets," said Ralph Dangelmaier, president of the wholesale banking group at ACI Worldwide. "ACI offers unmatched expertise regarding hosted payment systems solutions, and Mellon will leverage Enterprise Banker to deliver to their clients the full range of Mellon's online products and services."

About Mellon Financial Corporation

Mellon Financial Corporation is a global financial services company. Headquartered in Pittsburgh, Mellon is one of the world's leading providers of financial services for institutions, corporations and high net worth individuals, providing asset management, private wealth management, asset servicing, issuer services and treasury services. Mellon has approximately $5.8 trillion in assets under management, administration or custody, including $1.034 trillion under management. News and other information about Mellon is available at www.mellon.com.

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.