Alternate Title: USPS OIG [website]
"The U.S. Postal Service Office of Inspector General (USPS OIG) plays a key role in maintaining the integrity and accountability of America's postal service, its revenue and assets, and its employees. With $73 billion in revenue, the Postal Service is at the core of a $900 billion mailing industry that employs more than nine million people. The 800,000 employees and contractors of the Postal Service comprise the largest civilian federal workforce in the country. Delivering more than 213 billion pieces of mail yearly to 146 million delivery points and operating 37,000 postal facilities, America's postal system is one of the government's most trusted entities. The USPS OIG, an independent agency within the Postal Service under the general supervision of nine presidentially appointed governors, employs more than 1,100 auditors, investigators, and professional support personnel stationed in more than 90 offices to meet the challenge of preserving this trust."
United States Postal Service Office of the Inspector General: http://www.uspsoig.gov/index.cfm