then show the customer the summary, the invoice, for their agreement; but many shops today bypass this stage. The practice of presenting an invoice is most common in restaurants where a "bill" is presented after a meal. The salesperson would indicate to the customer (whether by way of an invoice or otherwise) the total amount payable, and the customer would indicate the proposed method of payment of the amount. Payment in cash is regarded as payment of the amount tendered, but payment by store account is not. After processing the payment, the salesperson would then generate in one document an invoice and receipt. If payment was made by a payment card, a payment record would normally also be generated. The invoice and receipt are the printed record of the transaction and are legal documents. A copy of these documents would normally be handed to the customer, though this step may be dispensed with. In many countries, a retailer may be under a legal obligation to provide a receipt to a customer which shows the details of a transaction and the shop and other information so that the tax authority can check that sales and related taxes are not being hidden. The document may also include messages from the retailer, warranty or return details, special offers, advertisements, or coupons, but these are merely promotional and not part of the formal receipt. Other receipts Receipts may also be provided for non-retail operations such as banking transactions. Barcodes Shops that use barcode readers may generate receipts with a barcode of the receipt identification number, which enables a salesperson to scan the barcode and quickly retrieve the details of the original transaction, for example: if a customer seeks to return or exchange goods or there is some other query. Customer history If linked to a customer shop account, some retailers' point-of-sale systems also allow the salesperson to see a complete record of the customer's buying history. A receipt (or a copy of a receipt) is the proof of purchase usually needed to make a return and often plays a vital part in a company's return and exchange policy. Recipients An invoice goes to the person responsible for paying the bill while the shipping list (or packaging slip) goes to the recipient. The shipping list is included in the shipped box. In some scenarios, the same person will pay the bill and receive the shipment.