An invoice is a documentation receipt generated during a business transaction. A seller issues this invoice to their customer. The invoice lists the products, the number of products, and the prices at which the products are being sold. Invoices for services indicate the type of work assigned, the number of hours worked and the number of days spent. If an employee worked extra hours or on holidays the information is also mentioned separately.
How to request an invoice from the supplier/vendor?
A written letter or an email is sent to the supplier/vendor, requesting the invoice. The letter consists of a request for an invoice for the amount of the number of products or services and the agreed prices for the products or services. This helps customers record the amount of payment they have to make to the supplier.
Request letter for the original invoice
A letter of request for the original invoice is basically requesting for the original document issued by the vendor or service provider during the business transaction. For example, point-of-sale (POS) receipts or online order confirmations are original invoices. For example:
Dear Mr. XYZ,
This is a request for the issuing of the original invoice of our business transaction made on ‘Date’. The transaction was made for ‘details of the products/services’. The order reference number of our transaction is [X].
Please forward us the original invoice.
Regards.

Sample
Invoice letter for payment
A payment invoice letter is issued by the seller to their customer to indicate what product or service the customer has bought, the quantity, the prices, and other details such as time of order and time of delivery. Some businesses provide a specific amount of time for payment. This time period is mentioned in the original invoice. Moreover, some businesses also provide discounts on fast payments. For example, payments made within 15 days may be given a 10% discount or payments made within 30 days may get a 5% discount. For example:
Dear Mr. XYZ,
This letter is being sent to issue the invoice letter for payment. Our transaction was made on ‘Date’, regarding the ‘details of product/service’.
You will find the invoice attached to this letter. Please make sure to confirm the details on the invoice with the details of the transaction. If you have any queries, contact me on my number, ‘Phone number’.


