An invoice is a request for payment. It is generally a list of the products ordered or the services obtained and also features prices, credits, discounts, taxes, and the total amount. Many invoices state when the customer has to pay by (usually around 30 days), and whether there’s a discount if they are able to settle the bill earlier. You will most often find information related to the business such as the address, telephone number, fax number, and website address provided on an invoice.
A sales receipt shows that payment has been made and that a sale has been finalized. It can act as proof of ownership should something go awry. They are similar to invoices in that they include the goods or services, prices, credits, discounts, taxes, the total amount paid, and the method of payment. There’s also the vendor’s contact information, but not much customer information since this acts as a receipt i.e. the customer’s proof of purchase.