The federal government is suing Walmart and the fintech company Branch Messenger, accusing the companies of forcing employees to use specific accounts to access their pay and of opening the accounts on the employees’ behalf.

The U.S. consumer finance watchdog accused Walmart and the workforce payments company Branch Messenger on Monday of forcing more than a million delivery drivers into using accounts that cost them more than $10 million in junk fees.

CFPB sues Walmart and Branch Messenger over allegations of opening up deposit accounts for workers without their authorization.