Form 21.02 - Affidavit in Support of Application for Change of Name of Minor (MUST be notarized PRIOR to filing at Court. Complete all fields on the Application for Change of Name of Adult (Form 21.0), the Birth Certificate.You can use this form to request a legal name change in Cuyahoga County Probate Court. Learn more about changing your name in Ohio. Click on the link(s) for the forms you'd like to download. Make sure to fill in all blanks on the application except the case number and the hearing date. All applications for new notary commissions, renewal applications, online authorizations, amendments and resignations must be filed electronically here. Information about the Ohio Notary Commission. The Ohio Secretary of State's office commissions and maintains records of all notaries public in Ohio. Completed Application for Change of Name.