LexisNexis Completes Acquisition of Seisint, Inc.
Acquisition Enhances Ability to Provide Customers with Powerful,
Fast and Easy-to-Use Risk Management Products and Services

DAYTON, OHIO, September 1, 2004 – LexisNexis U.S., a leading provider of legal, news and business information services, announced today that it has closed on its acquisition of Seisint, Inc., a U.S.-based provider of information management products and services, for $775 million. LexisNexis is a member of Reed Elsevier Group plc [NYSE: ENL; NYSE: RUK].

Seisint will become part of the LexisNexis U.S. Risk Management business of the Corporate and Federal Markets division. The LexisNexis Risk Management business includes flagship products such as RiskWise®, PeopleWise® and Banko. Risk Management products and services are used by lawyers, financial services, insurance, telecommunications and retail businesses, the Federal Government and law enforcement agencies. Those products and services are used to authenticate identity, predict fraud, control credit and fraud losses, to improve risk assessment and communicate with customers during the customer-management cycle. LexisNexis PeopleWise services help companies create better, more productive workplaces through pre-employment screening and background checking.

The technology and products developed by Seisint will fortify the LexisNexis capabilities in identity authentication, fraud prevention, credit and security risk products. The acquisition will allow LexisNexis to offer its customers expanded data, technology and product offerings.

Seisint provides information products that allow business, financial services, legal and government customers to quickly and easily extract valuable knowledge from a vast array of data. Its products, including Accurint and Securint, support customers in critical activities such as debt recovery, due diligence, fraud detection, identity verification, law enforcement, legal investigations, pre-employment screening, resident screening, and data supercomputing. Seisint’s services and products are supported by integrating the Seisint Data Supercomputer™ technology and patent-pending data linking methods.

About LexisNexis
LexisNexis (www.lexisnexis.com) is a leader in comprehensive and authoritative legal, news and business information and tailored applications. A member of Reed Elsevier Group plc [NYSE: ENL; NYSE: RUK] (www.reedelsevier.com), the company does business in 100 countries with 13,000 employees worldwide. In addition to its flagship Web-based Lexis® and Nexis® research services, the company includes some of the world’s most respected legal publishers such as Martindale-Hubbell, Matthew Bender, Butterworths, JurisClasseur, Abeledo-Perrot and Orac.

Through its risk management flagship products, RiskWise®, PeopleWise® and Banko, LexisNexis Risk Management helps to locate people and assets, authenticate identity, enable commerce, conduct background screening, and support national security initiatives. Customers include government agencies, top law firms and major corporations. For more information, contact www.lexisnexis.com/riskmanagement