Use this form to file a complaint against a business. A copy of the complaint and submitted materials will be included with a request for a response.Here's a sample to help you write a complaint letter about a product or service. SAMPLE COMPLAINT LETTER​​ I am writing about . . . (describe the product, including serial and model number, services, issue, law, or event). To submit your Consumer Complaint Form, you can fax it to 517-241-3771 or mail it to the Consumer Protection Division at P.O. Box 30213, Lansing, MI 48909-7713. Michigan Legal Help has tools to fill many kinds of forms but we do not cover all areas. You may have a blank form that you need to fill out on your own. This form is only for consumer complaints. First of all, you should write your complaint in details, and in good language.