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In Re Visa Check/mastermoney Antitrust Litigation In Re Visa Check/MasterMoney Antitrust Litigation(2003 U.S. Dist. LEXIS 4965)Background InformationIn 1999, a group of retailers[1] sued Visa and MasterCard for violating Sections 1 and 2 of the Sherman Act. Visa and MasterCard provide general purpose credit and debit card services to merchants and consumers.The retailers’ main allegation was that.