To amend the Fair Debt Collection Practices Act to restrict the debt collection practices of certain debt collectors.

Stop Debt Collection Abuse Act of 2017 This bill amends the Fair Debt Collection Practices Act to apply that Act's restrictions to collectors of debt owed to a federal agency. A federal agency that is a creditor may not sell or transfer a debt to a debt collector until 90 days after the obligation becomes delinquent or defaults. Specified notice to the consumer of such a sale or transfer is required. A collector of debt owed to a federal agency may not collect any interest, fee, charge, or expense that is: (1) unreasonable in relation to actual costs, (2) not authorized by a contract between the debt collector and the federal agency, or (3) greater than 10% of the amount collected. The Government Accountability Office shall study and report to Congress on the use of debt collectors by federal, state, and local government agencies.