Encore Capital Group Inc
Attorney General Lori Swanson said Encore's Midland Funding LLC unit took shortcuts in trying to extract payments, often using false and unreliable mass-produced, 'robo-signed' affidavits as supposed proof that money was owed.
A spokesman for Encore had no immediate comment.
Encore shares fell as much as 10.3 percent on Monday. They were down $1.33, or 5.2 percent, at $24.30 in early afternoon trading on the Nasdaq.
(Reporting by Jonathan Stempel in New York, editing by Matthew Lewis)