Louisiana Revised Statutes Tit. 41, § 381. Refund of purchase price in event of invalid sale

Every person, or his legal representatives who is the purchaser from the state of a tract of land, which had actually and immediately been located by the state and which is or may be void by reason of a prior sale thereof or by any valid right of pre-emption, or for want of title thereto in the state, shall be entitled to a repayment of any sum of money paid for the tract of land, on making proof to the satisfaction of the Register of the State Land Office that the land was erroneously sold by the state. The register may draw a warrant on the State Auditor for the repayment of this money.