The OIG's audits and reviews are designed to protect assets and revenue, ensure efficient and economical mail delivery, and safeguard the integrity of the postal system. We perform audits and reviews in compliance with standards published by the Comptroller General of the United States, the American Institute of Certified Public Accountants, the Institute of Internal Auditors, and the President's Council on Integrity and Efficiency.Visit the Office of Audit page

The investigative efforts of OIG Special Agents assist the Postal Service in protecting the mail and help in maintaining the integrity of postal personnel. These Special Agents - federal law enforcement officers - investigate internal crimes and frauds against the Postal Service. Visit the Office of Investigations page