La. Civ. Code art. 3296
Current with operative changes from the 2024 Third Special Legislative Session
Neither the mortgagor nor a third person may claim that the mortgage is extinguished or is unenforceable because the obligation the mortgage secures is extinguished or is unenforceable unless the obligor may assert against the mortgagee the extinction or unenforceability of the obligation that the mortgage secures.
La. C.C. § 3296