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Index/Topics/Informed Delivery

Informed Delivery

A service that provides email or dashboard notifications and previews of incoming letter-sized mail and certain package status updates.

Fact-Checks

2 results
Jan 31, 2026

why don't all USPS letters have the IMb barcode printed on them

The (IMb) is a 65-bar, sender-applied code that combines routing and tracking data and can be required for or for , but its use is optional for many mailers and constrained by technical, programmatic ...

Jan 13, 2026

How do you see if USPS certified mail was delivered

To verify delivery of a USPS Certified Mail piece, enter its Certified Mail tracking number into the USPS Tracking tool on tools.usps.com or the USPS Mobile app and review the scan history and deliver...

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