(a) The judgment in a proceeding to declare heirship is conclusive in a suit between an heir omitted from the judgment and a bona fide purchaser for value who purchased property after entry of the judgment without actual notice of the claim of the omitted heir, regardless of whether the judgment is subsequently modified, set aside, or nullified.
(b) A person is not liable to another person for the following actions performed in good faith after a judgment is entered in a proceeding to declare heirship:
(1) delivering the property of the decedent who was the subject of the proceeding to the persons named as heirs in the judgment; or
(2) engaging in any other transaction with the persons named as heirs in the judgment.
Official text of the Texas Estates Code as published by the Texas Legislative Council.