The major differences between an invoice and a receipt stem from when each type of document is provided during the purchasing process and the purpose for each document. An invoice is usually issued by the seller of a product or service to the person or company purchasing that item, usually once this item is transferred but before it is paid for. On the other hand, a receipt is issued by the seller to the buyer after the item has been paid for. While both of these documents are issued by the seller, the invoice is a request for payment while the receipt is a record of payment.
An invoice and a receipt are both typically issued by the seller of a product or a service to the buyer of that item, though each document is intended for a different purpose. Invoices are used as a means of documenting products or services provided by a seller to the buyer, and then requesting payment for that item. This is usually issued upon delivery of the ordered item, though an invoice can also be issued after an order is placed but prior to delivery.
The receipt is issued by the seller to the buyer of an item after payment is made for that item. It effectively acts as a proof of purchase for the buyer, so he or she can demonstrate that a product or service was legitimately purchased. This can also be used by a buyer to keep track of payments that have been received for various items. Both an invoice and a receipt can be used as part of a purchase cycle, to help the buyer and seller keep track of where they are in that cycle.
This difference in where an invoice and a receipt are issued within the time line of the purchase process is noteworthy. The importance of an invoice is based on the use of invoices for documenting sales prior to payment, allowing sellers to track outgoing products and indicating to buyers what products or services are incoming. This is important for properly tracking inventory on both sides of the purchasing process, and for buyers to keep track of payments that are pending. Receipts, on the other hand, allow buyers to track payments that have been made and make it easier for sellers to track what invoices have been paid and which ones are still pending.