File a complaint against a business with BBB, search for a business to file a complaint against, or find out the status of a complaint you submitted. File an Online Complaint.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. 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. Send postal service file complaint via email, link, or fax. You can also download it, export it or print it out. 01. Use the USPS website's Email Us form. Select an inquiry type that most closely relates to the complaint or question that you have. I would like to issue a complaint against Tactical Marketing who is sending me unsolicited advertising emails from Life Lock and others.