Once completed, note the SST number and come into our office to finish the process. A deed of trust is a legal document that serves as a security instrument in real estate transactions.Trust administration in San Jose ensures your trust instructions are carried out according to your wishes. Stepbystep guide on how to transfer property to a living trust in California preparing deeds, recording with the county and more. A deed of trust is a security instrument, just like a mortgage. Those without a firstpriority lien hold a lesssecure, potentially worthless interest in the real property. San Jose; San Martin; Santa Clara; Saratoga; Stanford; Sunnyvale. A trust deed, also known as deeds of trust, is a real estate agreement between a borrower and a lender when transferring a property's title to a trustee.