WASHINGTON (AP) — The Consumer Financial Protection Bureau sued a major debt collection law firm on Monday, alleging it is a “mill” that produces shoddy, mass-produced credit-card collection lawsuits.

The bureau’s claim, filed in federal court in Atlanta, states that Frederick J. Hanna & Associates has filed hundreds of thousands of lawsuits on behalf of banks including JPMorgan Chase, Bank of America, Capital One and Discover without doing even basic checks to determine whether the people they sued actually owed debts.