voucher
noun [ C ]
MONEY uk/ˈvaʊtʃər/ usa printed piece of paper used to pay for particular goods or services, or to pay less than the usual price:
Anyone spending $25 or more will get a $5 voucher to spend.
The company will pay most of the settlement in shares and discount vouchers.
a clothing/food/housing/travel voucher
The Inland Revenue wants to know about employee benefits, including vouchers for food and drink.
ACCOUNTING
a piece of paper that shows that money has been paid for something or that someone's accounts are correct:
You should keep all copies of sales vouchers to check off against statements.
He demanded that they go back until each overtime voucher could be matched with a specific job.
Unfortunately the payroll vouchers weren't being reviewed by managers.
See also
gift voucher