2. On A Purchase order Form Most business firms, especially larger ones, use purchase order forms prepared by the company's purchasing officers, when ordering goods. There is not a standard zed format for a purchase order form. Each firm has its own form specially designed to suit its purpose. A purchase order form may or may not be accompanied by a letter. If a letter is wrtten, it mercy identifies the enclosure without repeating the information in the form. An example of a purchase order form is on page 159)