Several years ago, Louisiana enacted a law prescribing a mandamus proceeding for unpaid contract sums purportedly owed by a public entity to a contractor – Louisiana Revised Statute 38:2191. The statute tackles both progress payments and final payment, distinguishing between the two and allowing withholding of a progress payment when there is “reasonable cause” to do so.

On the other hand, at least one Louisiana appellate decision held on the topic of final payment: once a final payment amount is “due” per the statute – based upon passage expiration of the lien period following “formal final acceptance” – the act of making the final payment is purely ministerial and not subject to defenses. According to that court, a defense to payment based on assessed liquidated damages – because the damages were disputed by the contractor – could not trump the essence of the statute allowing the contractor to pursue mandamus to collect the final payment.

More recently, on a public works levee project in Lafourche Parish, a dispute arose during the work concerning the means to secure material for constructing the levees. The net effect of the dispute entailed a major change in the contract price.