Tennessee Petition to Change Name — Adult is a legal document that must be completed and filed with the court when a person age 18 or older wishes to change their name in the state of Tennessee. This petition will ask for the petitioner's current name, the name they wish to change it to, the reason for the name change, and any additional information that is requested. It must be signed by the petitioner and notarized before it is submitted to the court. Types of Tennessee Petition to Change Name — Adult include Petition for Change of Name, Petition for Change of Name and Gender, and Petition for Name Change After Marriage.