Walmart and Branch Messenger, a payments platform, accused of deceiving workers about pay from retailer for two years.

The federal Consumer Financial Protection Bureau has sued Walmart over the way it treats its "Spark Drivers." The lawsuit alleges that Walmart illegally opened bank accounts in the drivers' names by using their personal data—including Social Security numbers—without authorization,

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.