The name change petition can be filed in the County Court or Supreme Court of the county where you live. 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.Your signature MUST be notarized unless a photocopy of the court document that authorizes the name change is provided with this request. 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. INSTRUCTIONS: Please click here for instructions on how to e-File a name change or name conformity case. The Applicant must complete an affidavit (Form 21.2E) explaining the applicant's diligent efforts to locate the parent. In any type of discrepancies in the NAME , you are required to sworn an Affidavit before the relevant LD. Court of law. To complete the affidavit, you will have to have it "notarized. " This means that you will need to sign the form in front of a notary public.