Duarte, Paulo2012Duarte , P 2012 , ' A intervenção do tribunal judicial no processo de constituição do tribunal arbitral e o princípio do contraditório ' , Default journal . https://doi.org/10.46294/ulplr%20-%20rdulp.v1i1.29702182-6994Under specific circumstances, the arbitral tribunal constitution procedure may come to an impasse, due to divergences between the parties or to the mere innaction of one of them or even of a third party. Such is the case when one of the parties or a third party does not appoint the arbitrator it should appoint according to the law or to the arbitration agreement. In order to overcome these types of situations, the Voluntary Arbitration Law provides for the intervention of the President of the Tribunal da Relação in the arbitral tribunal constitution procedure, granting him the power to, by appplication of one of the parties, name or choose the arbitrator the appointment of which has been ommited by the other party or the third party. This paper adresses the question of whether the procedure aimed at the decision of the President of the Tribunal da Relação must incorporate the defendant’s right to contradictory. The answer to this question is based, mainly, on the determination of which is the procedural form applicable to the intervention of the President of the Tribunal da Relação and on analysis of both the structure and effects of the arbitration agreement and the arbitrator´s contract.application/pdfporopenAccessDIREITOLAWarticlehttps://doi.org/10.46294/ulplr%20-%20rdulp.v1i1.2970