Official Website for Riverside County California Clerk Recorders Office. Riverside County Certificate of Trust Form.Fill in the blank form formatted to comply with all recording and content requirements. You need to get a solicitor to draft a Deed of Trust first to vary the percentages of your beneficial ownership. Assignment of Deed of Trust. Riverside County Deed of Trust Form. Fill out the preliminary change of ownership report to properly transfer your California real estate into your living trust. You must submit a complete copy of the trust agreement and a copy of the deed with your ap- plication to verify your eligibility. Deceased Homeowners. In California, you must file a Preliminary Change of Ownership Report (PCOR) with the county recorder's office when recording the deed.