Fillable forms for filing in Arizona Courthouses. Court Forms and Instructions.Completing the Forms. Leave this section blank for the Court to fill out. "Learn how to craft an effective character reference letter for court proceedings with our comprehensive guide. Please note that each court might have their own preferred forms. By mail: o Fill out the form letter at the end of these procedures. O Mail to the other party: â–« The completed form letter. Arizona state and county forms for filing or responding to a small claims lawsuit. Use our free Small Claims Demand Letter template to file a complaint with the Small Claims court.