In seat of appeal per cassation adverse the sentence that has decisive on the appeal per nullity of the praise arbitration, the judge of legitimacy not can examine directly the ruling arbitration, but only the decision emit in the judgment of appeal, for if it is nte and correctly motivated in ratio ai reasons of appeal of the praise, with the consequence that the union of legitimacy must be conducted exclusively through the feedback of the compliance a law and of the congruity of the motivation of the judgment that has decisive on the appeal of the praise.