La. R.S. 13:4947

The judgment of the court, confirming and homologating the sale, shall have the force of res judicata, and operate as a complete bar against all persons, whether of age or minors, whether present or absent, who may thereafter claim the property sold, in consequence of all illegality or informality in the proceeding, whether before or after judgment. The judgment of homologation shall in all cases be received and considered as full and conclusive proof that the sale was duly made according to law, in virtue of a judgment or order legally and regularly pronounced on the interest of parties duly represented.