To change your legal name or to correct an error in your legal name, complete a name change request (AccessID and password required). The adult name change form is used to ask (or petition) the Supreme Court or NYC Civil Court to change your name.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. File the completed petition and fingerprint card in the Prothonotary's Office located on the 2nd Floor of the. Courthouse and pay the applicable filing fee. A name change can be processed at any MVC Licensing Center on a walk-in basis. Bring all the required documentation in order to complete this transaction. CHECKLIST. ☐ Fill out the Petition to Change Name (of an Adult). ☐ Fill out the Verification form – you will need a notary. Note: These instructions apply to anyone completing a Name Change Petition for 1 person who is over 1 year of age and under 22 years of age.