A presumed father of a child may sign a denial of his paternity. The denial is valid only if:
(1) an acknowledgment of paternity signed or otherwise authenticated by another man is filed under Section 160.305;
(2) the denial is in a record and is signed or otherwise authenticated under penalty of perjury; and
(3) the presumed father has not previously:
(A) acknowledged paternity of the child, unless the previous acknowledgment has been rescinded under Section 160.307 or successfully challenged under Section 160.308; or
(B) been adjudicated to be the father of the child.
Official text of the Texas Family Code as published by the Texas Legislative Council.