A Texas Deed of Trust creates a lien on property to secure a Promissory Note. These are two documents needed for real estate loans and seller financing.A Deed of Trust in Texas transfers title of real property in trust. It is the equivalent to a mortgage used in other states and provides a secured interest. In a deed of trust to secure assumption, another person assumes the note already in place, guaranteeing payment to the grantor in the deed. Your signed and notarized Warranty Deed needs to be filed in the property records in the county clerk's office of the county in which the property is located. Payments are being deposited into a bank account that is in the trust. Trusts Living trust. Your signed and notarized Warranty Deed needs to be filed in the property records in the county clerk's office of the county in which the property is located. The instrument that these documents secure is most commonly called a promissory note.