Investigation Image

To protect the mail and to maintain the integrity of postal processes and personnel, the Postal Service relies on the investigative efforts of OIG special agents. These special agents – federal law enforcement officers investigate internal crimes and fraud against the Postal Service. Their efforts contribute to safeguarding the Postal Service’s revenue and assets and help deter postal crimes, ultimately helping to maintain a stable and sound Postal Service.


Special agents stationed in approximately 90 offices nationwide conduct investigations in the following program areas:

  • Contract Fraud
  • Financial Fraud
  • Internal Mail Theft
  • Official Misconduct
  • Special Inquiries (includes whistleblower reprisal and workplace environment)
  • Major Fraud
  • Healthcare Provider Fraud
  • Healthcare Claimant Fraud

Special agents also investigate bribery, kickbacks, extortion, conflicts of interest, and allegations against Postal Service executives. In addition, the Office of Investigations combats fraud and theft through the Countermeasures Directorate’s crime prevention efforts.