A receipt is documentation that payment has been made to finalize a sale. It serves as proof of ownership in most cases. It lists goods or services, prices, credits, discount, taxes, total amount paid and method of payment. Receipts generally include information about buyers and sellers, in different formats and to varying degrees. For example, point of sale purchases, such as buying gas for a car at a gas station, have complete seller’s contact information but limited buyer’s information. A receipt is the buyer’s proof of payment.