noun
exchange ticket; claim check; voucher
A document or token that allows you to exchange it for goods, services, or money. Common in contexts like cloakroom tickets, luggage claim checks, or vouchers for pre-paid items.
クロークで荷物を預けると、引換証を渡された。
When I left my luggage at the cloakroom, I was given a claim check.
この引換証と引き換えに、商品をお渡しします。
We will hand over the item in exchange for this voucher.
Compound of 引き換え (hikikae, 'exchange') + 証 (shō, 'certificate'). The kanji spelling 引換証 is a standard abbreviation of 引き換え証.