The nation's largest retailer is making headway in promoting the use of PIN debit over more costly forms of payment. But Wal-Mart Stores Inc. still is unhappy with the U.S. interchange system.
This spring’s settlement between the bank-owned card associations and retailers led by Wal-Mart Stores Inc. has been widely interpreted as a blow to the fortunes of so-called PIN-based debit, or debit ...
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