NEW YORK (AP) — The U.S. Justice Department has filed an antitrust complaint against Visa, alleging that the financial services giant uses its size and dominance to stifle competition in the debit card market, costing consumers and businesses billions of dollars.

The complaint filed Tuesday claims that Visa penalizes merchants and banks that don’t use its own payment processing technology to handle debit transactions, even though alternatives exist. Visa collects additional fees on each transaction processed on its network.

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