The name change petition can be filed in the County Court or Supreme Court of the county where you live. Adult Name Change Order, Form.The adult name change form is used to ask (or petition) the Supreme Court or NYC Civil Court to change your name. Complete and sign the appropriate birth certificate form. Enclose original documents to support the amendment. Fill out a name change petition form: You'll need to complete and file a name change petition form with the Suffolk County State Supreme Court. To update your personal information, including your primary service email address, log into NYSCEF and choose "Account Settings" on the left menu. EF-12 How do I file a change of name for an adult? Do not abbreviate or make other changes to the name. To save your changes.