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When Is a Letter Postmarked?

When the United States Postal Service formally receives and assumes custody of a letter, it is postmarked. A postmark contains the complete name of the post office where the item was processed, the state abbreviation, the postal code, and the date of shipping.

After a letter has been delivered to the post office or retrieved from the lobby drop boxes, it is postmarked. Once collected, letters dropped in collection boxes or left at the post officeโ€™s retail counter are also postmarked.

Mail that is metered, has a permit, or has pre-canceled postage stamps does not require a postmark. All other letters and flats, excluding those with a postage-verification system-applied indication, must be postmarked. The postmark nullifies the customer-applied postage.

Postmarks can be added either manually or automatically. Requests for hand-affixed postmarks are possible, and each local postmark is unique. Automated systems can process a huge volume of mail in a short amount of time and add an additional degree of protection. As mail passes through the postmarking equipment, it is screened for biohazardous substances. Previously, postmarks were applied via a mechanical mechanism.

Joel Gomez
Joel Gomezhttps://www.gadgetclock.com
Joel Gomez is an Avid Coder and technology enthusiast. To keep up with his passion he started Gadgetclock 3 years ago in 2018. Now It's his hobby at the night :) If you have any questions/queries and just wanna chit chat about technology, shoot a mail - Joel at gadgetclock com.

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