Fill Out the "Affidavit of Service" form in this packet. Form Title, Form No. Application for Change of Name for an Adult, CVNC11F.STEP 1: Fill out the "Application for Change of Name for a Family" and make 2 copies. The affidavit must be signed in the presence of a notary. You can go to the county courthouse and file a name change petition. You will need to fill out some paperwork and pay a filing fee. These forms can be found on the Internet at the Self Service Center of the Maricopa County Superior Court , or in person at your county superior court. Forms and informational resources for filing for a name change in Arizona Superior Court. Use state forms if your county is not listed. Here is the form you file in Superior Court with clerk in your county.