Editing Postmark (section)

{{Short description|Mark of the date/time that mail enters postal service custody}}
{{For |the American band|The Postmarks}}
{{Use mdy dates|date=June 2020}}
[[File:Postmark USS Texas 1932.jpg|thumb|Postmark used on [[United States Navy|U.S. Navy]] ship]]
{{Multiple image
| image1 = South Pole Postmark 1.png
| image2 = South Pole Postmark 2.png
| width  = 150
| footer = Postmark of the [[Amundsen–Scott South Pole Station]] at the [[South Pole]]
}}

A '''postmark'''<ref>Sometimes spelled "post mark" or "post-mark".</ref> is a [[postal marking]] made on an [[envelope]], parcel, [[postcard]] or the like, indicating the place, date and time that the item was delivered into the care of a postal service, or sometimes indicating where and when received or in transit.  Modern postmarks are often applied simultaneously with the [[Cancellation (mail)|cancellation]] or [[Killer (philately)|killer]] that marks postage stamps as having been used. Sometimes a postmark alone is used to cancel stamps, and the two terms are often used interchangeably. Postmarks may be applied by handstamp or machine, using methods such as rollers or [[Inkjet printer|inkjets]], while [[digital postmark]]s are a recent innovation.