Mastercard has been caught with their hand in the cookie jar. The company has been fined €570 million ($648.4 million) by the European Union (EU) after it was found to be keeping lower fees inaccessible from merchants for cross-border payments.

The European Commission announced the fine through a press release on January 22. Margrethe Vestager, the Commissioner in charge of competition policy said in the release:

“European consumers use payment cards every day, when they buy food or clothes or make purchases online. By preventing merchants from shopping around for better conditions offered by banks in other Member States, Mastercard’s rules artificially raised the costs of card payments, harming consumers and retailers in the EU.”

The Commission does not divulge how much of the heightened fees brought in for the credit card company, although for a fee of over half a billion euros, it had to be significant. As Mastercard cooperated with the EU, they were given a 10% discount on the fine.