The letter that is written by a potential buyer to the seller requesting him to deliver goods is known as order letter. By writing inquiry letters, buyers can collect necessary information about the price, quality of goods and terms of sale. If the buyer finds the quoted price, quality of goods and terms of sales satisfactory, he places an order to supply goods in his address. The seller delivers the good according to the buyer’s order.
In modern time, sellers supply printed orders forms to the customers and customers place orders by filling up those printed order blanks. In this case, the printed order sheet or blank is considered as the order letter.