Fill out the "Application for Change of Name for an Adult. Changing your name is a relatively simple procedure that can usually be done without a lawyer.The court uses a slightly different process for a petition and order for changing a child's name. AFFIDAVIT and you will be required to complete a new affidavit. 3. Unless exempt, carefully complete the Affidavit, sign, notarize and submit it to the County Recorder. Find out how to submit a public records request to the MCAO Custodian of Records. PARTY COMPLETING AFFIDAVIT (Name, Address, Phone Number):. 18. The forms were prepared for use in Maricopa County but can be used in other Arizona counties if you change "Maricopa" to your county name in the pleadings. Arizona Out-of-County Residence Affidavit (PDF). This AZTC 3 Approaches QuickGuide shows the differences between the counties.