How to file a complaint. To file a formal consumer complaint, complete the below affidavit and save a copy of your completed affidavit for your records.Read about consumer rights, laws and tips; submitting consumer complaints; and the process to obtain certain business licenses in Miami-Dade County. To file a consumer complaint online, please click below, fill out the form and click "Send. It is a good idea to send a letter, which clearly states your complaint. You may be able to resolve the problem without going to court. How to complete Statement of Claim. â–« Filed in Duplicate plus one for each Def. The Internal Affairs website has links to download a Citizen Complaint Form, or to File a Complaint On-Line. Resolving customer complaints; Accepting lost items when Lost and Found office is closed.