RCW 65 refers to the Revised Code of Washington Title 65, which deals with the laws governing the registration of documents related to real property. This includes regulations on how to properly record deeds, mortgages, and other legal instruments that affect property ownership and rights in the state of Washington. The purpose of RCW 65 is to ensure that property transactions are transparent and publicly accessible, providing a clear record of ownership and encumbrances. This helps protect the rights of property owners and facilitates the buying and selling of real estate by establishing a reliable legal framework.