Receipt paper is a special type of paper used primarily for printing receipts in various businesses, such as retail stores and restaurants. It is often coated with a chemical that reacts to heat, allowing it to change color when printed on by thermal printers. This eliminates the need for ink, making it a cost-effective option for businesses. Typically, receipt paper comes in rolls and is available in different widths and lengths to fit various printing machines. It is commonly used for transactions, providing customers with a record of their purchases, which can be important for returns and exchanges.