Under Louisiana law, unjust enrichment is a cause of action that is based in equity and provides that no one should be enriched at the expense of another. The elements of an unjust enrichment claim are: (1) an enrichment; (2) an impoverishment; (3) a connection between the enrichment and the impoverishment; (4) an absence of justification or cause for the enrichment and impoverishment; and (5) no other available remedy at law. The Supreme Court recently addressed the fourth element regarding the absence of justification for the enrichment.
In H & O Invs., LLC v. Par. of Jefferson Through Sheng, a grass cutting contractor entered into a contract with the Parish for grass cutting in certain areas. The Parish separately contracted with a second contractor for weed control of the same areas. During the contract period, the grass cutting contractor notified the Parish that there was unanticipated weed growth and suggested that the weed control contractor was not properly applying the herbicide. The grass cutting contractor alleged that its work became more expensive because of the weed control contractor’s failure to perform its contractual obligation.
The grass cutting contractor sued the Parish alleging unjust enrichment. The Parish filed an exception of no cause of action, claiming that there was no claim for unjust enrichment because a contract existed between the parties. The Fifth Circuit disagreed and held that the contractor could bring a claim for unjust enrichment because there was no contractual claim between the contractor and the Parish, as both parties fulfilled their contract obligations.
The Supreme Court reversed, noting that a claim for unjust enrichment requires a showing that there was an “absence of justification or cause for the enrichment.” The Supreme Court held that when a contract exists between the parties, it serves as the law between them, and that contract is the legal cause or justification for the enrichment. Therefore, the contract between the contractor and the Parish was in fact the justification for the enrichment such that it could not be “unjust.” The Supreme Court dismissed the contractor’s suit against the Parish.
Reference:
H&O Invs., LLC v. Par. of Jefferson, 24-554 (La. App. 5 Cir. 12/18/24), writ granted, decision rev’d sub nom. H & O Invs., LLC v. Par. of Jefferson Through Sheng, 2025-00086 (La. 5/20/25), 408 So.3d 958.