Chip Cards Slap U.S. Merchants With Unexpected Higher Debit Fees

  • Terminals seen favoring Visa, MasterCard signature systems
  • Wal-Mart suit highlights issue facing retailers of all sizes

Wal-Mart Stores Inc.’s lawsuit this week against Visa Inc. over how debit transactions are verified is casting a spotlight on an issue that’s been plaguing U.S. retailers since they began accepting European-style chip cards last year.

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