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Postal Encyclopedia

Facing Identification Mark

FIM

Barcodes & TrackingUpdated 2026-07-24

A pattern of vertical bars printed near the postage area on certain reply mail pieces to support USPS processing.

Definition reviewed 2026-07-24. This is a plain-English Plavidian reference; for USPS terms, the Domestic Mail Manual is the authority. For your own job, the final mail class, postage, and preparation are confirmed after list processing and production review.

Related terms in Barcodes & Tracking

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Ask Plavidian Expert for an answer based on the USPS Domestic Mail Manual, or send us the job and we'll confirm the preparation before you print.

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