This Deed of Trust, Assignment of Rents and Leases, Collateral Assignment of Property Agreements, Security Agreement and Fixture Filing A legal document that gives a mortgage lender right to any future profits that may come from leases and rents when a property owner defaults on their loan.How do I fill this out? Typically, an Assignment of Deed of Trust is recorded in the county recorder's office where the property is located. An instrument concerning real or personal property may be recorded if it has been acknowledged, sworn to with a proper jurat, or proved according to law. 1. Identify and fill in the names and addresses of the Trustor, Trustee, and Beneficiary. In order to fill-in the Legal Property Description area on a deed it is required to find the real estate as listed with the County Records. As this Deed of Trust, Security Agreement and Assignment of Rents (the "Purchased Assets"). A deed of trust is similar to a mortgage, and like a mortgage, it may include an assignment of rents. Texas Land Records and Deed Records.