A collection agency is a business that contacts customers on behalf of their clients, using various methods to enforce payment of overdue receivable and loan payments. Clients typically turn to collection agencies when they are unable to collect funds through their own internal efforts. Collection agencies tend to be more aggressive and persistent in their activities, and so are more likely to be targeted at those customers with whom a client no longer wants to maintain an ongoing relationship. There are many fee arrangements between clients and collection agencies, with the most common being a commission paid only when funds are successfully collected from customers. In this case, the collection agency collects from customers, extracts its commission, and forwards the remaining amounts to its clients.