MasterCard's and Visa's network rules prohibit ATM operators from offering lower prices for transactions over PIN-debit networks that are not affiliated with Visa or MasterCard. The suit says that this price-fixing artificially raises the price that consumers pay using ATMs, limits the revenue that ATM-operators earn, and violates the Sherman Act's prohibition against unreasonable restraints of trade. Johnathan Rubin, an attorney for the plaintiffs said, "Visa and MasterCard are the ringleaders, organizers, and enforcers of a conspiracy among U.S. banks to fix the price of ATM access fees in order to keep the competition at bay." In 2017, a US district court denied the ATM operators' request to stop Visa from enforcing the ATM fees. Debit card swipe fees In 1996, a class of U.S. merchants, including Walmart, brought an antitrust lawsuit against Visa and MasterCard over their "Honor All Cards" policy, which forced merchants who accepted Visa and MasterCard branded credit cards to also accept their respective debit cards (such as the "Visa Check Card"). Over 4 million class members were represented by the plaintiffs. According to a website associated with the suit, Visa and MasterCard settled the plaintiffs' claims in 2003 for a total of $3.05 billion. Visa's share of this settlement is reported to have been the larger. U.S. Justice Department actions In 1998, the Department of Justice sued Visa over rules prohibiting its issuing banks from doing business with American Express and Discover. The Department of Justice won its case at trial in 2001 and the verdict was upheld on appeal. American Express and Discover filed suit as well. In October 2010, Visa and MasterCard reached a settlement with the U.S. Justice Department in another antitrust case. The companies agreed to allow merchants displaying their logos to decline certain types of cards (because interchange fees differ), or to offer consumers discounts for using cheaper cards. Antitrust issues in Europe In 2002, the European Commission exempted Visa's multilateral interchange fees from Article 81 of the EC Treaty that prohibits anti-competitive arrangements. However, this exemption expired on December 31, 2007. In the United Kingdom, Mastercard has reduced its interchange fees while it is under investigation by the Office of Fair Trading. In January 2007, the European Commission issued the results of a two-year inquiry into the retail banking sector. The report focuses on payment cards and interchange fees. Upon publishing the report, Commissioner Neelie Kroes said the "present