A former high-ranking Visa executive who is considered one of the architects of the bank card industry said in trial testimony Monday that competition between MasterCard and Visa is still “tepid,” and that consumers and merchants suffer as a result.

Bennett Katz, who resigned last year as general counsel of Visa International after 29 years, testified that board members of Visa and MasterCard have leaked confidential information to the other association, and that there have been situations in which conflicts of interest have arisen.

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