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Postal Encyclopedia

Tabbing

Updated 2026-07-24

Wafer seal closure

Preparation & Production

Applying tabs or wafer seals to folded self-mailers/booklets so they stay closed during USPS processing.

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.

Related terms in Preparation & Production

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