The Missing Mail App from USPS is a free, 24/7 service available to all classes of mail that do not arrive at their destination on time. Customers may log into their USPS account at https://missingmail.usps.com and enter details of their missing item to assist the Mail Recovery Center with identification. Learn more at USPS.com.
Any mail that has gone missing, whether insured or not, can be searched on the app on USPS.com.
This feature includes packages and pieces of mail that were deemed undeliverable, lost, or delayed.