noun
certificate of custody; custody receipt
A document issued to prove that an item has been deposited or is being held in custody, often used in legal, financial, or warehousing contexts.
銀行は預かり資産の保管証を発行した。
The bank issued a certificate of custody for the deposited assets.
Compound of 保管 (ほかん, 'custody, safekeeping') and 証 (しょう, 'certificate, proof').