Redemption slip is a term commonly used in the retail industry to refer to a voucher or coupon given to customers as compensation for a previous product or service failure. It is also sometimes called a redemption code or redemption certificate. Synonyms for redemption slip include rebate, refund, credit memo, gift certificate, and voucher. These terms can all be used to describe a document or code that can be used to redeem a discount or compensation at a later time. Redemption slips are often used as a customer service tool to maintain customer loyalty and satisfaction, and as a marketing strategy to motivate repeat purchases.