La. Civ. Code art. 1821
Current with operative changes from the 2024 Third Special Legislative Session
An obligor and a third person may agree to an assumption by the latter of an obligation of the former. To be enforceable by the obligee against the third person, the agreement must be made in writing.
The obligee's consent to the agreement does not effect a release of the obligor.
The unreleased obligor remains solidarily bound with the third person.
La. C.C. § 1821