Texas Civil Practice and Remedies Code - CIV PRAC & REM § 16.034. Attorney's Fees

(a) In a suit for the possession of real property between a person claiming under record title to the property and one claiming by adverse possession, if the prevailing party recovers possession of the property from a person unlawfully in actual possession, the court:

(b) To recover attorney's fees, the person seeking possession must give the person unlawfully in possession a written demand for that person to vacate the premises. The demand must be given by registered or certified mail at least 10 days before filing the claim for recovery of possession.

(c) The demand must state that if the person unlawfully in possession does not vacate the premises within 10 days and a claim is filed by the person seeking possession, the court may enter a judgment against the person unlawfully in possession for costs and attorney's fees in an amount determined by the court to be reasonable.