Arbitration analysis: In a decision of 24 February 2026, the Paris Court of Appeal dismissed Team France SAS (Team France)’s action to set-aside a French Arbitration Association (AFA) award in favor of M. [W] [B] (M. [B]) and his company SASU Immo Dream (Immo Dream) (the Award). Team France sought annulment of the Award on the basis of an alleged violation of due process under Article 1492(4) of the French Code of Civil Procedure (FCCP), arguing that the arbitral tribunal relied on a belated argument submitted in the post-hearing phase and on additional grounds that it raised sua sponte without giving the parties an opportunity to comment. The court dismissed all allegations of due process violations. It started by recalling that, under Article 1466 of the FCCP, a party who fails to raise a procedural irregularity in a timely manner during the arbitration shall be deemed estopped from relying on it later. The court further explained that arguments addressed during the hearing and in the post-hearing submissions cannot be challenged before the annulment judge if the party failed to raise the alleged irregularity before the arbitral tribunal and to request the reopening of the proceedings. The court also clarified that the tribunal did not violate due process by: finding Team France’s claim for a reduction of damages raised in its post-hearing brief inadmissible as Team France could have requested to reopen the proceedings but failed to do so; and relying on the absence of certain documents at the time the contract was executed, to conclude that it must be deemed rescinded. The tribunal had requested these documents, which had been included as appendices to a pre-contractual document submitted in the arbitral proceedings, from the parties, to no avail. Written by Julie Spinelli, partner, Emma Ruby, associate, and Marta Kakounis, trainee, at Le 16 Law.