Modification of Deed of Trust. Up of a document Description automatically generated.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. To transfer a property title deed in Texas, you will need a properly prepared deed as follows: The deed must be in writing. This research guide contains information and resources related to deeds of trust in Texas. The mortgage modification agreement is a legal document between a lender and borrower to change an existing loan's terms. After the loan is closed, the deed of trust should be amended to add these types of agreements that are entered into after the loan is closed. Sec. 12.009. MORTGAGE OR DEED OF TRUST MASTER FORM. O §11.54 Instructions for Completing.