voucher

中文： 代金券、礼品券

1. A piece of paper or other token that entitles the holder to a discount, or that can be exchanged for goods and services. · a voucher for a free kettle· This voucher entitles the bearer to a 20% discount on frozen goods.
2. A receipt.
3. One who or that which vouches.
4. A copy of a published advertisement sent by the agency to the client as proof of publication.
5. A mechanical device used in shops for automatically registering the amount of money drawn.

复数 vouchers