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Postmarkr

Proof Of Mailing

USPS accuracy rollout taxonomy tag

ARTICLES

Illustration of a fill-in letter template linked by a dotted trail to a Certified Mail receipt stub, an accepted postmark and a delivery record card.

CERTIFIED MAIL ·

Certified Letter Template: What to Write and How to Send It (2026)

A fill-in certified letter template with three worked examples, the exact 2026 cost to send it Certified Mail, what the receipt proves, and the file to keep so the letter holds up later.