The term corner card means the wording, sometimes with a pictorial feature, in the upper left hand corner of a postal stationery envelope or an envelope designed to have regular adhesive stamps affixed to it. It is there for the purpose of stating the sender's return address to facilitate the return of undeliverable mail.
The term corner card means the wording, sometimes with a pictorial feature, in the upper left hand corner of a postal stationery envelope or an envelope designed to have regular adhesive stamps affixed to it. It is there for the purpose of stating the sender's return address to facilitate the return of undeliverable mail.
Source: Wikipedia "Corner card" · CC BY-SA 4.0
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