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. Postal Inspectors suggest that, before completing a business transaction, contact the Chamber of Commerce, Better Business.The Department of Consumer and Worker Protection (DCWP) will consider your complaint a tip. If you include your address, DCWP will mail you a complaint form. Send postal service file complaint via email, link, or fax. You can also download it, export it or print it out. 01. File an Online Complaint. The BBB will not accept anonymous complaints. Edit, sign, and share bbb customer complaint form online. No need to install software, just go to DocHub, and sign up instantly and for free.