433 W.Harrison Street, Room 3255 Chicago, IL 60699-32551-877-876-2455USPS Criminal Investigations Service Center deals with security and safety of postal services. The Postal Inspection Service offers assistance in report postal fraud, mail lost or stolen. The service center helps in enforcing the laws that ensure public safety within the USA's mail system. USPS Criminal Investigations Service Center also offers security regarding mail and package theft, identity theft, mail fraud, fraud prevention and education. The service center also helps to report a suspicious mail.
USPS Service Center Contact
Customer Care Center
1-800-275-8777Hours of Operation
Monday to Friday between 8:00 a.m. to 8:30 p.m. ET and Saturday: 8:00 a.m. to 6:00 p.m. ETTechnical Support Team
1-800-344-7779Monday to Friday between 8:00 a.m. to 8:30 p.m. ET and Saturday: 8:00 a.m. to 6:00 p.m. ETDomestic & International USPS Tracking
1-800-222-1811Monday to Friday between 8:00 a.m. to 8:30 p.m. ET and Saturday: 8:00 a.m. to 6:00 p.m. ETStamps & Postal Store Orders
1-844-737-7826