La. Civ. Code art. 1941
Current with operative changes from the 2024 Third Special Legislative Session
When commencement of the performance either constitutes acceptance or makes the offer irrevocable, the offeree must give prompt notice of that commencement unless the offeror knows or should know that the offeree has begun to perform. An offeree who fails to give the notice is liable for damages.
La. C.C. § 1941