Can a collection agency add monthly interest on an unpaid balance?
The Fair Debt Collection Practices Act section 808(1) prohibits a debt collection agency from adding any charges to the original debt you owe, unless they have the legal right to do so within the confines of your original contract with your creditor. "Original charges" includes the amount you owe plus any charges for returned checks, collection charges, interest, or late fees. These amounts have to be provided for in your original contract or terms of service.