• Fill out Preliminary Change of Ownership Report (PCOR) form from the AC Assessor's Office. • Record deed and file PCOR.There is no charge for the Preliminary Change of Ownership Report (PCOR) if it is complete and accompanies the transfer document. They can update the Deed using either a Grant Deed or Quitclaim form. These forms can be used to transfer the property from your old name to your new name. File it with the county recorder: The notarized deed must be submitted to the county recorder's office. This information assists the Assessor in determining whether there is a change in ownership; and if so, the fair market value of the property. Alameda County Law Library has a research guide to steer you through the process of making changes in ownership for property located in Alameda County, CA. Below you will find information about the services we offer and addresses to our Oakland and Tri-Valley office locations. Alameda County Law Library has a new research guide to steer you through the process of making changes in ownership for property located in Alameda County, CA.