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

If you file on paper, you should ask for a postmark at the post-office counter or choose certified mail with a return receipt.

From The Wall Street Journal • Jan. 26, 2026

In its filing, the Postal Service said it’s also seeking price adjustments on special services such as money order fees and certified mail.

From Seattle Times • Apr. 9, 2024

There is also the cost of envelopes, printer ink and certified mail when sending client letters.

From New York Times • Jun. 7, 2023

Also increasing would be the cost of domestic and international postcards, one-ounce international letters, certified mail, post office box rentals, money order fees and mailing insurance.

From Washington Times • Apr. 10, 2023

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