(NEW YORK — September 11, 2008) —   ACI Worldwide, Inc. (NASDAQ: ACIW) today announced the appointment of a new member to its board of directors, Dr. James C. McGroddy. His appointment was effective September 10, 2008.  Dr. McGroddy will serve as chairman of the board’s newly established technology committee. 

(NEW YORK — July 23, 2008) —   ACI Worldwide, Inc. (NASDAQ: ACIW) today announced that it will hold a conference call on August 12, 2008 at 8:30 am EDT to discuss the June 30, 2008 quarterly financial results.  Interested persons may access a real-time audio broadcast of the teleconference at www.aciworldwide.com/investors or use the following numbers for dial in participation:  US/Canada: (800) 340-8364, International/Local:  (706) 634-2207.   Please provide your name, the conference name ACI Worldwide, Inc. and conference code 57035367.

(New York, N.Y. – 19 May 2008) – ACI Worldwide (NASDAQ: ACIW), a leading international provider of software for electronic payment systems, today announced that Empire National Bank, headquartered in Islandia, New York, has selected ACI to provide online banking services for their business and retail customers.  The newly formed Long Island-based bank has established ACI Enterprise Banker™ as the core of its online banking system, and available services will include information reporting, stop payment, ACH origination, wire transfer, internal transfer, and positive pay.  The product operates in the ACI On Demand hosted services environment, relieving the bank of the technical burden of system implementation and ongoing maintenance.

(New York, N.Y. – 19 May 2008) – ACI Worldwide (NASDAQ: ACIW), a leading international provider of software for electronic payment systems, today announced that Sterling Savings Bank has selected ACI Enterprise Banker™ as the single product solution for its online business banking customers.  The bank is a subsidiary of Sterling Financial Corporation with more than $12 billion in assets and 178 branches throughout Washington, Oregon, Idaho, Montana and California.  Sterling Savings Bank will implement the full suite of Enterprise Banker services, including reporting, transfers, ACH, wire and imaging.  The product will reside in ACI’s On Demand hosted services environment.

ACI Worldwide, Inc.(NASDAQ:ACIW), a leading international provider of software for electronic payment systems, today announced financial results for the period ending March 31, 2008.  We will hold a conference call on May 8, 2008, at 8.30 a.m. EDT to discuss this information.  Interested persons may also access a real-time audio broadcast of the teleconference at http://www.aciworldwide.com/investorrelations.

(New York, N.Y. – 7 May 2008) – ACI Worldwide, Inc. (NASDAQ: ACIW), a leading international provider of software for electronic payment systems, today announced that MasterCard Worldwide has selected ACI’s electronic payment solutions as key elements of the new MasterCard Integrated Processing Solutions™ (IPS).  MasterCard selected ACI’s next-generation payments solutions to help create the IPS platform, which provides banks a suite of branded debit network and card issuer processing services including PIN and signature debit and prepaid processing, and ATM driving. 

(Watford, UK – 16 April 2008) – ACI Worldwide (NASDAQ: ACIW), a leading international provider of software for electronic payment systems, today announced a strategic partnership with Eunexus, an internet banking fraud and security solutions company.  The partnership will offer financial institutions in the UK and Europe a more sophisticated fraud prevention strategy by integrating Eunexus’ IP profiling intelligence with ACI’s real-time transaction monitoring solution, ACI Proactive Risk Manager™.  This combination offers a proven solution that enables financial institutions to reduce transaction fraud losses over the internet banking channel.

(New York, N.Y. – 15 April 2008) – ACI Worldwide (NASDAQ: ACIW), a leading international provider of software for electronic payment systems, is celebrating 15 years working with Knet, the national banking switch in Kuwait.  The long time BASE24® customer uses a variety of ACI software solutions to manage Kuwait’s ATM banking network, deliver point of sale services and manage online debit card transactions.

 (New York, N.Y. – 3 April 2008) – ACI Worldwide (NASDAQ: ACIW), a leading international provider of software for electronic payment systems, today announced the latest version of its award-winning online banking solution, ACI Enterprise Banker 7.4.  The 7.4 release expands Enterprise Banker’s ability to serve the needs of business and consumer online banking customers with new and enhanced functionality that further strengthens integration options to the product.  Release 7.4 extends capabilities for integrating with a bank’s portal and to other third parties including bill payment providers.  It also enhances import and export capabilities.

(Watford, UK – 1 April 2008) – ACI Worldwide, (NASDAQ: ACIW), a leading international provider of software for electronic payment systems, today announced that Simba Technology, a major Sub Sahara company based in Nairobi, Kenya, has licensed BASE24®, the ACI Card Management System™ and ACI Proactive Risk Manager™ to establish an electronic payment service for banks in their region.

(NEW YORK – 25 March 2008) – ACI Worldwide, Inc. (NASDAQ:ACIW), a leading international provider of software for electronic payment systems, today announced that its BASE24-eps solution is live in more than 30 customer sites, managing electronic payment devices, acquiring transactions, and performing high-volume switching, routing and authorization services.  ACI has launched a global effort to help users of its earlier products migrate to BASE24-eps, outlining release and support strategies to help customers plan their migration to ACI’s next-generation solution. 

 (New York, NY. – 28 February 2008) – ACI Worldwide (NASDAQ: ACIW), a leading international provider of software for electronic payment systems, today announced that the company added 49 new customers in calendar year 2007, including 17 new customers in the quarter that ended December 31, 2007.  New customers licensed products spanning the breadth of ACI’s solutions from fraud and risk management to online banking, smart card management and online payments processing.  In addition, 50 existing ACI customers licensed one or more additional applications from the company in 2007, expanding their use of ACI’s integrated software. 

(New York, NY– February 7, 2008)  – ACI Worldwide (NASDAQ: ACIW), a leading international provider of software for electronic payment systems, today announced that it will use mFoundry’s Spotlight Financial Platform™ to offer mobile banking capabilities to users of its online business and consumer banking software.  The mobile banking solution will integrate mFoundry’s award-winning downloadable application software with ACI Enterprise Banker™, ACI’s industry-leading online banking system.  The solution will allow business and consumer online banking customers to use their cell phones and other wireless handheld devices to access real-time account information and other banking applications.

(New York, NY. – 05 February 2008) – ACI Worldwide (NASDAQ: ACIW), a leading international provider of software for electronic payment systems, today announced that AVENUE®, a distinguished brand in Redcats USA’s portfolio, and a specialty apparel retailer with over 480 stores, has selected an ACI On Demand solution to drive the switching and settlement of electronic payment transactions involving credit cards, debit cards, checks and gift cards.  The solution will interface with the new AVENUE® front-end payment system and help the company comply with various Payment Card Industry (PCI) mandates.

(Omaha, Neb. — 14 January 2008) — ACI Worldwide (NASDAQ: ACIW), a leading international provider of software for electronic payment systems, today announced a strategic alliance with Simply Retail Solutions (SRS), LLC.  The agreement allows ACI and SRS to combine and market their retail payment suites to deliver a more complete solution that will address all points within payment initiation and payment switching.  The SRS Multi-Channel Product Suite manages a retailer’s entire portfolio of sales transaction solutions and facilitates exposure of information across channels for everything related to customers and inventory.  The ACI Retail Commerce Server™ suite of solutions allows merchant retailers to tailor their payment acceptance strategy to maximize profits, manage transaction fees and optimize the customer purchase experience.  Together these products will offer mutual customers a proven end-to-end retail payment solution.

 (Omaha, Neb. – 14 January 2008) – ACI Worldwide (NASDAQ: ACIW), a leading international provider of software for electronic payment systems, today announced that nine retailers have upgraded their systems and are running ACI Retail Commerce Server™ release 4.4.  Several other customers are in various phases of product testing and implementation.