postmark
postmark. An official mark put by the post office on an item of mail to cancel the stamp and to indicate the place and date of sending or receipt. [Cases: Postal Service 15. C.J.S. Postal Service and Offenses Against Postal Laws §§ 18–19.]
postmark. An official mark put by the post office on an item of mail to cancel the stamp and to indicate the place and date of sending or receipt. [Cases: Postal Service 15. C.J.S. Postal Service and Offenses Against Postal Laws §§ 18–19.]