If you are unable to file online, please download and mail a completed paper form. Find information and tools to submit a consumer complaint to the Consumer Financial Protection Bureau.Learn where to file a complaint about banking and investment products, retirement plans, and the companies and professionals that offer them. This agency handles consumer complaints concerning applicable regulated businesses. How do I fill this out? Fill out all sections of the complaint form. Fill out ONE complaint form for EACH check you are filing. Fill out the Online Customer Complaint Form. The Florida Complaint form serves as a formal method of submitting a grievance about an attorney's conduct to The Florida Bar. Have you got a question, concern, or complaint about a bank?