MasterCard's and Visa's bickering over debit card rules has taken a new turn with the release of a letter from five state antitrust regulators critical of MasterCard.

The opinion was delivered in October but came to light last week. MasterCard International Inc. executives said the opinion supported their recent decision to allow issuers of its Maestro debit card also to participate in competing Visa programs.

Limited Time Offer

Save $400 off your subscription. Special offer ends April 30, 2017.

14-Day Free Trial

No credit card required. Complete access to articles, breaking news and industry data.