delivery receipt; receipt of acceptance
A document acknowledging that goods or a package have been received, often signed by the recipient.
荷物を受け取ったら、受領書にサインをしてください。
When you receive the package, please sign the delivery receipt.
受領書 acknowledges receipt of goods or documents, whereas 領収書 specifically certifies receipt of a payment.
Compound of 受領 (receipt, acceptance) + 書 (document).