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. This form is only for consumer complaints. First of all, you should write your complaint in details, and in good language. Consumer Action offers a sample complaint letter and an email complaint template. You can cut and paste these documents below. To submit your Consumer Complaint Form, you can fax it to or mail it to the Consumer Protection Division at P.O. Box 30213, Lansing, MI 48909-7713. SAMPLE COMPLAINT LETTER I am writing about . . . (describe the product, including serial and model number, services, issue, law, or event).