Official Forms for Viewing and Downloading. The below link will take you directly to the Assessor's Office forms page.The PCOR is near the bottom of the page under "Change in Ownership Forms". Access forms available from the Assessor's office, including benefits, business personal property, change in ownership, and other general forms. Contra Costa County Clerk-Recorder. Contra Costa County Trustee Deed Form. Fill in the blank form formatted to comply with all recording and content requirements. Contact the insurance provider to request a change in beneficiary designation. Complete the necessary forms to facilitate the change. Notice of Hearing-Decedents Estate or Trust.