U.S. Postal Inspection Service
The U.S. Postal Inspection Service supports and protects the U.S. Postal Service and its customers by enforcing the laws that defend the nation’s mail system from illegal or dangerous use.
Toll-free number
1-877-876-2455
Find an office near you
Find Your Local Postal Inspection Service OfficeMain address
Criminal Investigations Service CenterAttn: Mail Fraud
433 W Harrison St., Room 3255
Chicago, IL 60699-3255
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