Texas Estates Code - EST § 55.201. Complaint and Citation

(a) If a person sold property and entered into a bond or other written agreement to transfer title to the property and then died without transferring the title, the owner of the bond or agreement or the owner's legal representative may:

(b) Except as provided by Subsection (c), the bond or agreement must be filed with the complaint described by Subsection (a).

(c) If good cause under oath is shown why the bond or written agreement cannot be filed with the complaint, the bond or agreement or the substance of the bond or agreement must be stated in the complaint.