The legal battle between American Express and the credit card associations has taken another bizarre turn, with MasterCard International Inc. filing a lawsuit against one of its largest members.

The member, Advanta Corp., had already been sued by Visa U.S.A. for alleged trademark infringement in a marketing alliance with American Express Co., also a defendant in the case.

Subscribe Now

Access to authoritative analysis and perspective and our data-driven report series.

14-Day Free Trial

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