The name change petition can be filed in the County Court or Supreme Court of the county where you live. Your signature MUST be notarized unless a photocopy of the court document that authorizes the name change is provided with this request.The forms for changing a name or sex designation in the Supreme Court or New York City Civil Court are included in the chart below. 5. That the purpose of this affidavit is to instruct the Franklin County Auditor and Recorder to reflect the change of name from Old Name to New Name. FRANKLIN COUNTY FORM 21.2 - APPLICATION AND AFFIDAVIT FOR CHANGE OF NAME OF A MINOR. As a Notary, how do you stay impartial if the signer is your relative? First, you get a copy of your birth certificate. Second, you get the necessary form(s) to change your name from the Clerk of Courts at Franklin County. You will need to "file" – give to the Court – a "Change of Name" petition with your local Probate Court. An online application may be filled out prior to the in-person portion of the application process.