La. Civ. Code art. 3019
Current with changes from the 2024 legislative session effective on or before 7/1/2024, from Acts 2,3, 6-535, and 580-647
A mandatary who exceeds his authority is personally bound to the third person with whom he contracts, unless that person knew at the time the contract was made that the mandatary had exceeded his authority or unless the principal ratifies the contract.
La. C.C. § 3019