An invoice is a document that is sent by a seller to a buyer, requesting payment for goods or services that have been provided. It typically includes details such as the quantity, description, and price of the items or services, as well as any applicable taxes or discounts. Invoices are usually issued before payment is made and serve as a formal request for payment.
On the other hand, a receipt is a document that is provided by a seller to a buyer after payment has been made. It serves as proof of payment and includes details such as the date, amount paid, and a description of the items or services purchased. Receipts are typically issued at the point of sale or upon completion of a transaction.
In summary, an invoice is a request for payment, while a receipt is proof of payment.