The United States Postal Service (USPS) has an online Money Order Inquiry System for tracking the status of USPS money orders. Consumers track money orders by entering the serial number of the money order into the tracking system. Banks and financial institutions are required to fill out PS Form 6401 to track money orders issued by the postal service.
As part of the Money Order Inquiry System, the U.S. Postal Service publishes a current hot list of missing money orders. The list consists of money order serial numbers for money orders known to be missing. The list is compiled and updated by post office retail window employees. Any money orders that show up on the missing list is under a fraud alert, and employees are warned not to cash them.
The U.S. Postal Service replaces defective or damaged money orders. A replacement is issued after the negotiable portion of the money order is returned, along with a matching customer receipt. If a money order is lost or stolen, it can be replaced by submitting PS Form 6401. After receiving the form, the post office does an inquiry into the status of the money order. Upon verification that it is missing, the post office issues a replacement, which also requires a fee payment.