Discover Financial Services said Monday that it's dropping the Foreign Currency Fee on its cards.

As of Sunday, the Riverwoods, Il. company said it will no longer charge the 2 percent fee. Foreign transaction fees usually help banks increase revenue.

Discover's decision to drop the tax comes at a time when its customers are increasingly sensitive to bank fees, a spokeswoman said in an email.

Earlier this year, JPMorgan Chase eliminated its foreign transaction fee on its Sapphire Premium cards, giving cardholders a break on its 3% fee.

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