coupon

Example:The discount voucher allows you to save up to 20% on all electronics this week.

Definition:A document that entitles the holder to a discount on the purchase of a product or service.

Example:The plumber gave me a voucher for a free check-up and a 10% discount on any repair work.

Definition:A piece of paper that acts as a promise to pay for a product or service, or gives the holder a right to claim a discount or free service.

Example:I exchanged the ticket for a free concert ticket, but I didn’t attend due to the rain.

Definition:A card, paper, or card with a number or other information on it that entitles the holder to some privilege, such as admission to an event or a discount on a product.