If an order form is not provided or if you want to make certain points quite
clear, you have to write an order letter. This type of letter should be organized like
an order form and should contain the same information so that it will be easy for
the supplier to read and to check. To help your supplier fill the order accurately,
you should place each order item on a separate line in a tabular form.
The body of an order letter usually contains three parts: