BBVA & Telefonica to Monitor Universal M-Payments With Fraud Detection Solution From Nestor and ACI Worldwide.

Business/Technology Editors

PROVIDENCE, R.I.--(BUSINESS WIRE)--Aug. 2, 2000

PRISM eFraud Integrated with ACI's Solution to Route and Authorize

Mobile-Commerce Payment Transactions

Nestor, Inc. (OTC:NEST), in conjunction with its alliance partner, ACI Worldwide (Nasdaq:TSAI) announce that Banco Bilbao Vizcaya Argentaria SA (BBVA) and Telefonica Moviles SA of Spain have selected Nestor's PRISM(R) eFraud to detect fraudulent mobile e-commerce transactions. Through their recently formed joint venture known as MovilPago, BBVA and Telefonica will integrate PRISM eFraud as a component of ACI's enterprise mobile payments solution.

MovilPago is an innovative payment system that allows consumers to effect m-payments via the Global System for Mobile Communications (GSM) or other mobile communications systems. MovilPago plans to deploy the system in 30 countries worldwide within two years, with an anticipated 100 million consumers using the system and 5 million merchants accepting payments.

MovilPago is expected to have a huge impact on the way all consumers make m-payments of both low and high value. MovilPago aims to become a common medium for everyday consumer e-payments -- particularly smaller value transactions in traditional, Internet and m-commerce environments. Organizers believe the system will appeal immediately to innovative consumers and particularly to younger segments of the market, and that it will gain universal acceptance very rapidly.

"The unique feature of the MovilPago system is that payments can be made from any existing GSM or other digital handset, with no modification required to the handset or SIM card. The system is open to all GSM or other digital operators and to all financial institutions," said Mario Cantero Brandes, CEO of MovilPago. "The ACI solution we've selected to power the system provides us with a high speed, high reliability m-payments platform that can scale to support the transaction volumes we anticipate and can adapt to increasing value-added transaction types."

About ACI

ACI Worldwide (Nasdaq: TSAI) is helping customers change the way the world works with solutions designed to improve the way we live, work and shop. Every minute of every day, financial institutions, retailers and networking industries rely on ACI solutions and services to smoothly move money and information. As a leading international provider of solutions for e-payments, ACI maintains operations in the Americas, Europe/Middle East/Africa and Asia/Pacific. More than 2,300 customers in 79 countries use ACI distributed solutions. Visit ACI Worldwide on the Internet at www.aciworldwide.com.

About BBVA

BBVA is the largest financial group in Spain both in terms of profit and market capitalization and is the second largest within the Euro zone. In 1999 group profits reached 1.75 billion euros and assets totaled 238 billion euros. BBVA Group is present in 37 countries, mainly in Europe and Latin America, through a network of more than 9,300 branches, and employs 130,000 people. The group has 35 million clients and 1.5 million shareholders. Its stock is quoted on nine stock exchanges around the world. BBVA employs advanced technology in distribution channels, manages one of the largest industrial portfolios in Spain, and shows an extraordinary strong balance sheet.

About Telefonica Moviles

Telefonica Moviles is the mobile telephone communications subsidiary of the Telefonica Group, which is one of the world's five largest telecom companies. It has more than 20 million clients throughout Spain (11.5 million clients), Latin America (Argentina, Brazil, Chile, Peru, El Salvador, Guatemala and Puerto Rico) and Morocco. The company is a true leader in the Spanish and Latin American markets, not only in terms of number of clients but also in terms of innovation and deployment of the latest technologies for the development of new services.

About NestorCommerce

NestorCommerce is a division of Nestor, Inc., a leading provider of intelligent decision-support solutions for the financial services and e-commerce industries. Nestor's client/server products incorporate innovative pattern-recognition technologies ideally suited for data-intensive, real-time decision applications. The company's products provide predictive fraud detection and case management for e-commerce fraud, credit, debit, retail and commercial card fraud, as well as merchant fraud, money laundering and customer relationship management. Nestor products are sold direct and by selected partners worldwide. Through its affiliate, Nestor Traffic Systems, Inc., the company also applies its technologies to a suite of video-based intelligent transportation systems that promote enhanced traffic management and improved safety. For more information, call 401-331-9640 or visit www.nestor.com.

This press release may contain forward-looking statements made pursuant to the "safe harbor" provisions of the Private Securities Litigation Reform Act of 1995. You are cautioned that such forward-looking statements are not guarantees of future performance and are subject to a variety of risks and uncertainties. Actual results could differ materially. For a discussion of risk factors, interested parties should review the Company's filings with the Securities and Exchange Commission, including Exhibit 99.01 to the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 1999, the quarterly report on From 10-Q for the quarter ended March 31, 2000, and the Form 10-Q to be filed for the quarter ended June 30, 2000.

PRISM is a registered trademark Nestor, Inc. All other trademarks are trademarks or registered trademarks of their respective companies.