Include the case number and arbitrator's name, as well as a preferred contact number in case the Clerk of Court's staff needs to follow up. 5. Find out how to get an arbitrator appointed and the appointment process.Each County in Arizona has an established arbitration threshold. Click General Civil Lawsuits-Superior Court Start Now. 2. Select Maricopa from the drop down menu. 3. STEP 1: USING BLACK INK ONLY, Fill out the "Civil Cover Sheet. " â–« Write in "Yuma" as the county. The clerk or court administrator must appoint an arbitrator to an action no later than 120 days after an answer is filed. The list of eligible arbitrators includes all county residents who have been active members of the State Bar of Arizona for at least 4 years. You consent to the arbitration being conducted in the county of Maricopa, Arizona.