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.BBB helps consumers and businesses in the United States and Canada. Find trusted BBB Accredited Businesses. Find out how to file an insurance claim to get compensation if your insured USPS package was lost, damaged, or had broken or missing pieces. Use the USPS website's Email Us form. Select an inquiry type that most closely relates to the complaint or question that you have. Bold Face Type in the text indicates revised or new language. Get the Attorney generals office to send you a consumer complain form. Fill it out with every detail you can get.