La. Stat. tit. 9 § 2991.4
Current with changes from the 2024 Legislative Session
A sale of mineral rights by mail solicitation shall be made by authentic act or by act under private signature signed by the transferor. The acceptance of any form of payment by the transferor or any action whereby the transferor otherwise manifests assent to the sale shall not satisfy the requirement of the transferor's signature.
La. R.S. § 9:2991.4