A USPS barcode that can encode tracking, routing, mailer identification, and service information for letters and flats.
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Updated 2026-07-24
Intelligent Mail barcode
Barcodes & Tracking
Definition reviewed 2026-07-24. Plavidian reference, written from the USPS Domestic Mail Manual. Final mail classification, postage, and preparation are confirmed after list processing and production review.
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Mail tracking and verified production
The mail tracking cluster: from the Intelligent Mail barcode on the piece to the USPS scan data that indicates when it reached delivery.
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