A deliveryreceipt acceptance certificate or completion certificate that is sufficient to prove the completion of the contracted activity under the preceding item.
签收单、验收单或完工证明，足以证明完成第一款之契约行为者。
2
The buyer has to sign a delivery note as proof of receipt.
购买者必须签收送货单表明货已收到。
《牛津词典》
3
This would allow you to receive an acknowledgment of the message or receipt of delivery even if the response message is empty.