Carreker Corporation Press Release - November 21, 2002

ALLIED IRISH BANKS, p.l.c. CHOOSES CARREKER’S FRAUDLINK SOLUTIONS TO PREVENT CHECK FRAUD

DALLAS (November 21, 2002) — Carreker Corporation (Nasdaq: CANI ), a leading provider of technology and consulting solutions for the financial industry, announced today that Allied Irish Banks, p.l.c. (AIB), Ireland’s leading financial institution, has selected Carreker’s FraudLink™ solutions to detect and prevent fraudulent check activity.

Edel McDermott, group fraud manager at Allied Irish Banks, p.l.c., said, “Embedded deep within the culture of AIB is our commitment to protect customers’ assets, as well as the integrity of our organization. Carreker’s FraudLink allows us to deter check fraud by quickly and consistently identifying suspect items and delivering our customers the highest standards of security and service.”

Already installed at 90 of the leading banks in Ireland, U.K., Australia, South Africa, U.S. and Canada, Carreker’s FraudLink suite enables banks to expand their fraud mitigation capabilities for teller stations, the back office, and deposited items. It uses advanced check-writing and deposit behavior analytics to identify potentially fraudulent check transactions. It also helps improve risk management costs by allowing banks to better allocate resources to prioritized items and streamline the investigation process.

John Carreker, executive vice president and managing director of Carreker’s international operations, said, “Although paper check volumes are leveling off in today’s payments environment, they are still extremely vulnerable to a variety of fraud and can pose a significant financial threat in terms of lost revenue. The new Basel II Capital Accord will increase financial institutions' focus on operational risk, especially in the key areas of people, processes and technology.”

“Approximately 90 percent of checks in Australia are inspected by Carreker’s fraud mitigation technology, and these solutions are quickly gaining market share within other international markets,” said J. D. (Denny) Carreker, chairman and CEO of Carreker Corporation. “Now, with three of the major banking institutions in Ireland using FraudLink, our risk solutions will also scrutinize 75 percent of Ireland’s checks.”

About Allied Irish Banks, p.l.c.
AIB Group is Ireland’s leading banking and financial services organization, with total assets of over €88 billion. It operates principally in Ireland, Britain, the USA and Poland and employs 30,000 people worldwide in more than 1,000 offices. Additional information about AIB can be found at www.aibgroup.com

About Carreker Corporation
Carreker Corporation improves earnings for financial institutions around the world. The Company’s integrated consulting and software solutions are designed to increase clients’ revenues and reduce their expenses, while improving security and increasing the value of their customer relationships. Carreker provides products and services to more than 250 clients in the United States, Canada, the United Kingdom, Ireland, Australia, and South Africa. Clients include the full range of community, regional and large banks, among them more than 75 of the largest 100 banks in the United States. Headquartered in Dallas, Texas since 1978, Carreker Corporation also has offices located around the world including London, Toronto, and Sydney. For more information, visit www.carreker.com.

Forward Looking Statement - Except for historical information, the statements in this release, including statements regarding future financial performance, the market for our products and services, and the value of our new contract signings, are forward-looking statements within the meaning of the federal securities laws. These statements are subject to numerous risks and uncertainties that could cause actual results to differ materially, including but not limited to economic, competitive, governmental and technological factors affecting our operations, markets, services, products and prices. For information concerning these risks and uncertainties, see our most recent Form 10-K. We assume no obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as may be required by law.

Carreker Corporation Contacts:

Vickie Gorton, Senior Vice President,
Director Investor Relations
972 371-1601 PH
972 458-2567 FX
Email: vgorton@carreker.com

Lisa Jackson,
Marketing and PR, International
+44 (0) 20 7469 1628 PH (London)
+44 (0) 20 7283 5806 FX