USPIS Law and Legal Definition

USPIS is the abbreviation for the United States Postal Inspection Service. The USPIS is the federal law enforcement arm of the U.S. Postal Service. The USPIS’s jurisdiction is defined as "crimes that may adversely affect or fraudulently use the U.S. Mail, the postal system or postal employees."

The USPIS investigates postal offenses and civil matters relating to the Postal Service. USPIS leads and assists in numerous joint federal and state investigations. It has forensic laboratories and the required professional and technical staff to support the investigations. They assist Inspectors in analyzing evidentiary material needed for identifying and tracing criminal suspects and in providing expert testimony for cases brought to trial.

As fact-finding and investigative agents, Postal Inspectors are federal law enforcement officers who carry firearms, make arrests and serve federal search warrants and subpoenas. Inspectors work closely with U.S. Attorneys, other law enforcement agencies, and local prosecutors to investigate postal cases and prepare them for court.