noun
advice of receipt; return receipt; AR
Postal term for a service that provides proof of delivery, often used in registered mail.
この書類は受取通知付きで送ってください。
Please send this document with advice of receipt.
受取通知が戻ってきたので、相手が確かに受け取ったことがわかる。
Since the advice of receipt came back, we know the other party definitely received it.
Compound of 受け取り (receipt) and 通知 (notification).