Postmarking your Mail
What is a Postmark?
A postmark is a marking applied by the Postal Service™ to a mailpiece (letter, flat or package). A postmark displays the following:
- The name or location (city and state) of the processing facility or retail unit that applied the postmark
- The date of the first automated processing operation performed on that mailpiece, if the postmark was applied at a processing facility
- The date it was accepted at a retail unit, if the postmark was applied at retail
- Cancellation markings, where necessary, to cancel postage so that it may not be reused, which will typically be seen as lines or bars printed over the postage.
How do I get a Postmark?
Postmarks are generally applied by the Postal Service via automation on machines in processing facilities or manually applied by employees at those facilities. Postmarks may also be applied manually by employees at a retail unit upon request from the customer.
While we are not changing our postmarking practices, we have made adjustments to our transportation operations that will result in some mailpieces not arriving at our originating processing facilities on the same day that they are mailed. This means that the date on the postmarks applied at our processing facilities will not necessarily match the date on which your mailpiece was collected by a letter carrier, dropped off at a retail location, or placed in a collection box.
The Postal Service does not postmark every piece of mail in the normal course of operations. For example, Marketing Mail, Presort First-Class Mail, and metered mail presented to the Postal Service in trays will bypass originating processing operations, including machine cancellation. While the Postal Service intends to postmark letters and flats that are entered as Single-Piece First-Class Mail and processed on automated cancellation machines, there are circumstances when mail will not receive a postmark, including where a mailpiece is stuck to another mailpiece when it runs through the cancelling machine, or where the machine runs out of ink or smears when applying postmarks.
Note: If you want to ensure that your mail receives a postmark and that the date on the postmark aligns with the date of mailing, you can go to any USPS retail counter and request a postal employee to manually postmark, or "hand-cancel", up to 50 items for free. If you need to have more than 50 items hand-canceled, please contact the local Postmaster or other manager in advance to ensure adequate resources are available to assist.
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For more information on postmarks, please see:
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Why did the Postal Service change how it postmarks mail?
The Postal Service has not changed and is not changing our postmarking practices, which have been consistent since we began moving away from hand-canceling every item at Post Offices decades ago. Postmarks will continue to be applied at processing facilities in the same manner and to the same extent as before, and will continue to contain the name or location of the facility that applied the postmark and the date on which the first automated processing operation was performed on that mailpiece.
While we are not changing our postmarking practices, we have made adjustments to our transportation operations that will result in some mailpieces not arriving at our originating processing facilities on the same day that they are mailed. This means that the date on the postmarks applied at our processing facilties may not necessarily match the date on which the mailpiece was collected by a letter carrier or dropped off at a retail location, including via a collection box.
In the past, wasn't all mail postmarked on the day it was mailed?
No. The Postal Service accepts possession of a mailpiece under a variety of circumstances - for example, when a letter carrier collects a mailpiece from a mailbox or collection box or when a postal retail associate accepts a mailpiece from a customer at a retail location. There is even more variation in terms of when customers consider their envelopes "mailed" - e.g., when they put the envelope in a collection box (regardless of when the Postal Service picks it up) or when they put it in their office's mailroom, etc. Because we found there to be public misconceptions around the practice and timing of postmarks even before our network modernization, we wanted to ensure better understanding of postmarks overall, and to inform the public that it is becoming more common that the date on a postmark may not match the day an item was mailed.
Other Services for Proof of Mailing:
USPS also offers other services that can provide evidence of mailing such as:
- Certificate of Mailing
- Certified Mail
- Registered Mail
For additional information, pricing and fees for these and other domestic mail extra services, please see What Domestic Mail Extra Services are Available?