The following information is for general informational purposes only and should not be considered legal advice. What type of document can be recorded?Official Forms for Viewing and Downloading. What Is a Public Record? Documentary transfer tax (DTT) is a tax collected when an interest in real property is conveyed. Fill in the blank form formatted to comply with all recording and content requirements. A deed of trust, also called a trust deed, is the functional equivalent of a mortgage. Of Contra Costa County, a political subdivision of the State of California ("Lender") whose address is 30. Muir Road, Martinez, California 94553. 1. Welcome to the Contra Costa County Clerk-Recorder's Official Records Index.