An invoice letter for payment, also known as an invoice, is a commercial document issued by a seller to a buyer, itemizing and quantifying the products or services the seller has provided to the buyer, along with their prices, and often including the terms of payment.
Invoices are essential for businesses to maintain accurate records of sales and payments, track cash flow, and ensure timely payments from customers. Historically, invoices were handwritten or typewritten, but with the advent of computers, electronic invoicing has become increasingly common, offering convenience, efficiency, and cost savings.