Texas Family Code - FAM § 154.303. Standing to Sue

(a) A suit provided by this subchapter may be filed only by:

(b) The parent, the child, if the child is 18 years of age or older, or other person may not transfer or assign the cause of action to any person, including a governmental or private entity or agency, except for an assignment made to the Title IV-D agency under Section 231.104 or in the provision of child support enforcement services under Section 159.307.