Avis de réception

Avis de réception, or acknowledgement of receipt, is a paid service where the sender is notified that a letter has been delivered.

Some countries have issued special stamps to pay for the service. Otherwise, international mail and sometimes domestic mail is handstamped with some kind of handstamp reading AR.

 File:Colombia Bolivar AR A.webp|Colombia, Department of Bolivar. File:Montenegro AR.jpg|Montenegro. File:Mexico regd AR.jpg|Mexico cover, registered with "AR" handstamp; there are many different styles. 

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