Order means a request from a customer to a supplier of goods to send goods according to this request. Order letter are two kinds . They are formal and informal letter. Formal order letter is followed by an acceptance letter.It follows certanin formalities that is, a letter  written to place an order for the goods following certain formalities is called a formal order letter .An inquiry and acceptance letter are the pre-steps of a formal order letter .On the other hand, an informal order letter is written without formalities.An acceptance letter is not required in case of informal order letter.

A good order letter should contain the following points.

1.Goods to be ordered should be specific and clear.
2.Price of goods to be ordered should be clearly stated.
3.The conditions of payment should be clearly stated.
4.Time of delivery and mode of carriage should be stated.