Press Release

(New York, N.Y. – 20 October 2008) – ACI Worldwide, Inc. (NASDAQ: ACIW), a leading international provider of software for electronic payment systems, today announced that Bank of Hawaii, the largest independent financial institution in Hawaii, has renewed its commitment to ACI Enterprise Banker. Along with the renewal the bank will roll out many new capabilities to its business customer base.

“We are pleased to play an ongoing strategic role in Bank of Hawaii’s efforts to offer innovative products to a larger customer base,” said Ralph Dangelmaier, president of ACI Worldwide Americas.  “With Enterprise Banker, ACI has always strived to readily integrate with customers’ systems, delivering robust online banking solutions that are easy to access and easy to use.”

ACI Enterprise Banker is an enterprise-wide solution that allows financial institutions of all sizes to uniquely package products and services for different markets and customers from a single, flexible platform.  The solution offers a full range of functionality including balance and transaction reporting, ACH origination, wire transfer origination and reporting, remote check deposit, bill presentment and payment, and cash concentration.  In addition, the solution provides an infrastructure for easily integrating other products and services offered by an institution.

About Bank of Hawaii

Bank of Hawaii Corporation is a regional financial services company serving businesses, consumers and governments in Hawaii, American Samoa and the West Pacific. The Company's principal subsidiary, Bank of Hawaii, was founded in 1897 and is the largest independent financial institution in Hawaii. For more information on Bank of Hawaii Corporation visit the company's web site: www.boh.com.

About ACI Worldwide, Inc.

ACI Worldwide is a leading provider of electronic payments software and services to major banks, retailers and processors around the world. The company's solutions enable online payment processing, online banking, fraud prevention and detection, and back office services such as settlement, account management, card management and dispute processing. ACI solutions provide market-leading levels of reliability, manageability and scale to over 800 customers in 88 countries. Visit ACI Worldwide 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 ACI Worldwide Incorporated, 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 risk factors, parties that are relying on the forward-looking statements should review the Company's filings with the Securities and Exchange Commission, including the Company's Form 10-K filed on January 30, 2008, the Company’s Form 10-Q filed on February 19, 2008, both as amended by the Form 10-K/A and Form 10-Q/A, respectively, filed on March 4, 2008, the Company’s 10-Q filed on May 9.2008, and the Company’s 10-Q filed on August 11, 2008.

Contact details

For more information contact:
Alynn W. Atherton
ACI Worldwide
+1 508 424 5375
alynn.atherton@aciworldwide.com