Fall 2025 Semiannual Report to Congress
The Office of Inspector General is tasked with ensuring efficiency, accountability, and integrity in the U.S. Postal Service. We also have the distinct mission of helping to maintain confidence in the mail and postal system, as well as to improve the Postal Service's bottom line. We use audits and investigations to help protect the integrity of the Postal Service. Our Semiannual Report to Congress presents a snapshot of the work we did to fulfill our mission for the six-month period ending September 30, 2025. Our dynamic report format provides readers with easy access to facts and information, as well as succinct summaries of the work by area. Links are provided to the full reports featured in this report, as well as to the appendices.
A Message from the Inspector General
It has been another successful year for the United States Postal Service Office of Inspector General (USPS OIG). Over the last six months alone, we returned over $184 million to the federal government and other victims, including more than $78 million to the Postal Service. We’ve issued 76 reports, made 498 arrests, and completed 1,348 investigations.
We remain a lean and efficient organization that always looks for new ways to leverage cutting-edge technology and data analytics to efficiently focus our limited resources. For example, to aid our investigations into mail theft, we developed a powerful tool that helps us pinpoint exactly where in the postal system checks and credit cards go missing. Another example is using data analytics to guide our audits by identifying where across the country postal problems are occurring. We have even started to venture into the use of AI.
Our work helps inform the Postal Service, the USPS Board of Governors, the Postal Regulatory Commission, and Congress. We also keep Congress informed by participating in congressional hearings. Over the past year, OIG leadership testified at four congressional hearings covering postal oversight, workers’ compensation, and mail theft.
I am proud of the USPS OIG as we continue to meet our mission to promote the integrity, accountability, and efficiency of the U.S. Postal Service and its regulator, the Postal Regulatory Commission. The USPS OIG continues to do its part to fight fraud, waste, and abuse in the federal government and help the Postal Service continue delivering for the American public.
Please take a moment to read this report and learn more about our work. In this Semiannual Report to Congress, we provide highlights from our work covering three major areas — Postal Crime, Service Performance, and Workforce Management.
Tammy L. Hull
Inspector General, United States Postal Service