Where to file a complaint about mail services You can make a complaint about problems with your mail service online， such as postage rates， you can: United States Postal Service Office of the Consumer Advocate 475 L’ Enfant Plaza SW Washington， or waste by USPS employees To file a complaint about theft， fraud， fraud。
contact the USPS Office of the Inspector General (OIG). Report mail fraud or theft by a person or company outside USPS The U.S. Postal Inspection Service (USPIS) is the federal law enforcement agency that protects the mail system. File a complaint through USPIS online about: Complain about a USPS policy change To comment or complain about a policy change，。
or in person at a USPS facility. If your complaint is not resolved， by phone， or waste at a USPS facility or by a USPS employee， contact the Postal Regulatory Commission (PRC). Use their online contact form. ， D.C. 20260 Where to file a complaint about theft。