What is the IM®pb?
The Intelligent Mail® package barcode is the Postal Service's next generation tracking barcode for parcels and Extra Services. A package with an IMpb allows the USPS® to provide end users with detailed tracking information. The barcode offers full visibility to package tracking on the delivery status of the parcel as it routes to its destination.
What items require a barcode?
Parcels, packages, and Priority Mail® Express or Priority Mail® pieces of any shape, size, or price category, including flat-rate boxes and envelopes require an IMpb (barcode). In addition, the following mail classes require an IMpb:
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