Once you've decided to take your grievance about an attorney to the State Bar, you need to file an attorney complaint form. Find out how to resolve a problem without going to court, file a complaint against a lawyer, and how to get money back from an unethical attorney below.Instructions for Filing a Complaint Against a California Attorney. Fill out all spaces on the California Attorney Complaint Form completely. There is no standing requirement for proceeding as a complaining witness in a State Bar investigation. The State Bar Of California allows clients to file a complaint about a lawyer's actions or fees. Outcomes include the issue being handled out of court. Instructions for Filing a Complaint Against an Attorney Fill out all spaces on the complaint form completely. The first thing you should do is reach out to the investigator, introduce yourself, and state that you intend to fully comply with the investigation. Yes, you can file an anonymous complaint regarding a potentially unlicensed attorney in California.