La. Civ. Code art. 3155
Current with changes from the 2024 legislative session effective on or before 7/1/2024, from Acts 2,3, 6-535, and 580-647
If the thing pledged is another person's obligation not arising under the lease of an immovable, the pledge is effective against third persons only from the time that the obligor has actual knowledge of the pledge or has been given notice of it.
La. C.C. § 3155