In California, a deed of trust must come with security, typically a promissory note. A deed of trust is used to secure a loan on real property.Learn how this legal document can be an easy way for a lender to collateralize a loan. Deed of Trust or "Trust Deed", is the document that secures a loan on a piece of property. The Deed of Trust and the secured Note go hand-in-hand. 2. Market value and equity in the. Property and the security for your loan. 3. A Deed of Trust allows a similar relief, but without requiring the court process. To fill out this document, please ensure that you have all necessary details regarding the property and the individuals involved. A California Deed of Trust is a legal document used in real estate transactions in California.