MasterCard Inc. received an antitrust complaint from European Union watchdogs over concerns it's "artificially raising" card-payment fees.

The EU's statement of objections targets measures thwarting cross-border competition among banks that offer card services to retailers as well as excessive fees when foreign visitors go shopping in the 28-nation bloc, the European Commission said in an e-mailed statement today.

"We currently suspect MasterCard is artificially raising the costs of card payments, which would harm consumers and retailers in the EU," said EU Competition Commissioner Margrethe Vestager.

EU antitrust regulators have targeted swipe fees on credit- and debit-cards for more than a decade, warning that the way the charges are collectively agreed on is anti-competitive. Visa Europe Ltd. has also tussled with the Brussels-based commission over its fees system. Last year, it pledged to cut levies for processing credit card payments in a settlement with the EU that would reduce charges by 40 percent to 60 percent.

Amid a regulatory clampdown, the EU has passed a law that would cap interchange fees on card payments and cut costs by 6 billion euros ($6.6 billion) per year. MasterCard was previously accused by the EU of waging a "mad campaign" seeking to derail the rules.

MasterCard said it will respond to the EU complaint and is working with the commission "as part of an ongoing constructive dialog."

"Throughout this procedure we have kept the needs of both consumers and merchants in mind and aim to further encourage the uptake of electronic payments inside and outside the European Union," Purchase, New York-based MasterCard said.

The EU's antitrust complaint alleges MasterCard's rules prevent banks from offering lower interchange fees to retailers based in another EU state, where levies may be higher.

The commission also said MasterCard's levies for EU-based transactions with cards issued outside the region set an artificially high minimum price for processing payments.

A statement of objections allows the EU to set out its case, laying out where officials suspect a company has violated competition rules and citing evidence from complainants. Companies have a chance to respond in writing.

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