Experian plc is a multinational data broker and consumer credit reporting company headquartered in Dublin, Ireland. It is listed on the London Stock Exchange and is a constituent of the FTSE 100 Index. Experian is a partner in USPS address validation. It is one of the "Big Three" alongside TransUnion and Equifax. In addition to its credit services, Experian also sells decision analytic and marketing assistance to businesses, including individual fingerprinting and targeting. Like all credit reporting agencies, the company is required by U.S. law to provide consumers with one free credit report every year. Wikipedia