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.The Plaintiff(s). sues. Defendant(s). I certify that I, or the firm, company, or corporation I am authorized to represent, am the legal owner within the meaning of California Vehicle Code. West Sacramento, CA 95798-9002. Please provide copies of all documents relating to your complaint with your completed complaint form. Note: You may complete the form, save the document to your computer, scan and attach. How do I fill this out? This article will make the process of responding to a debt lawsuit a little bit easier and tell you how to answer a summons for debt collection in Florida. Fill out and complete the online.