A receipt is a document that serves as proof of a transaction between a buyer and a seller. It typically includes details such as the date of purchase, the items purchased, their prices, the total amount paid, and the method of payment. Receipts can come in various formats, including printed paper versions or digital formats sent via email. They are often used for record-keeping purposes and can assist in returns or exchanges of purchased items. A well-structured receipt not only helps in tracking expenses but also ensures transparency in transactions.