La. Civ. Code art. 2035
Current with operative changes from the 2024 Third Special Legislative Session
Nullity of a contract does not impair the rights acquired through an onerous contract by a third party in good faith.
If the contract involves immovable property, the principles of recordation apply to a third person acquiring an interest in the property whether by onerous or gratuitous title.
La. C.C. § 2035