When a customer finishes shopping and goes to the checkout, they receive a small slip of paper called a “checkout slip.” This slip is usually printed on the receipt and can be used on a future visit to the store. In addition to serving as a discount, the slip can also be a promotional tool for other brands or services partnered with the issuing store. It is frequently used in shopping centers to build customer loyalty. These slips can be distributed based on purchases made at the checkout or using the customer’s loyalty card data.