Washington Petition For Change of Name (Adult) is a legal process in the state of Washington that allows an adult to officially change their name. This process involves submitting a petition to the Superior Court of the county in which the petitioner resides, along with supporting documents. The petitioner must provide information such as their current name, the new name they wish to use, and the reason why they wish to change their name. The petitioner also needs to submit documents such as a copy of their birth certificate, a copy of their driver's license or state identification card, and a criminal background check. There are two types of Washington Petition For Change of Name (Adult) available — Joint Petition and Individual Petition. A Joint Petition is used when two people wish to change their names together, while an Individual Petition can be used when a single person wants to change their name.