certified mail

American  

noun

1. uninsured first-class mail requiring proof of delivery.

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Etymology

Origin of certified mail

First recorded in 1950–55

Example Sentences

Use certified mail, registered mail, or an approved private delivery service like FedEx or UPS, not labels from self-service kiosks or postage meters.

From The Wall Street Journal • Mar. 20, 2026

Under the terms of his contract, Huggins would have had to submit a letter by registered or certified mail to voluntarily resign.

From Washington Times • Jul. 10, 2023

Attorneys for Paris and the Baxters then sent notice of service by certified mail to 10 Scientology addresses in Clearwater and California, according to court records.

From Seattle Times • Dec. 29, 2022

Mr. Camacho did not respond to multiple attempts to contact him by telephone, email, text message and through certified mail.

From New York Times • May 4, 2022

If you want to know when the Copyright Office receives your material, send it by registered or certified mail and request a return receipt from the U.S.

From Supplementary Copyright Statutes, US Copy. Office by Library of Congress. Copyright Office