In this paper, we design a return mail forecasting system that can reduce the bounce rate of postal customers for moving. Customers will request a change of address from their service provider if their residence address changes due to a move. At this time, the customer and other customers who have the same address as the previous address or the customer who has the same address after the change of residence are set as the estimated moving customers. A mail return prediction system is designed to reduce the mail return rate of the estimated moving customers by performing residential address renewal for these customers. This system can prevent waste of manpower and material resources in management and loss of returned mail, and it is possible to update the residence address by using short text message and can prevent exposure of personal information due to membership.