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. The appropriate person must sign the document, and that person's signature must be notarized (i.e. , Release, Deed of Trust, Deed, etc.). A trust deed is always used together with a promissory note (also called "prom note") that sets out the amount and terms of the loan. A deed of trust is a document that you sign for buying a home. In a home loan transaction, the lender commonly requires the borrower to sign a mortgage or a deed of trust, along with a promissory note. In a deed of trust to secure assumption, another person assumes the note already in place, guaranteeing payment to the grantor in the deed.