A rebate is a form of buying discount and is an amount paid by way of reduction, return, or refund that is paid retrospectively. It is a type of sales promotion that marketers use primarily as incentives or supplements to product sales. Rebates are also used as a means of enticing price-sensitive consumers into purchasing a product. The mail-in rebate (MIR) is the most common. A MIR entitles the buyer to mail in a coupon, receipt, and barcode in order to receive a check for a particular amount, depending on the particular product, time, and often place of purchase. Rebates are offered by either the retailer or the product manufacturer. Large stores often work in conjunction with manufacturers, usually requiring two or sometimes three separate rebates for each item, and sometimes are valid only at a single store. Rebate forms and special receipts are sometimes printed by the cash register at time of purchase on a separate receipt or available online for download. In some cases, the rebate may be available immediately, in which case it is referred to as an instant rebate. Some rebate programs offer several payout options to consumers, including a paper check, a prepaid card that can be spent immediately without a trip to the bank, or even as a PayPal payout.