Even in theme of judgment arbitral irritation, the question of the violation of the contradictory must be being examined not below the profile formal profile ma in the area one ric Herca Volta to the assessment of one actual lesion of the possibilities of deduct and contradict, waves check if the act has equally reached the purpose to establish u u N regular contradictory e if, anyway, non -compliance not has caused prejudice to part; nor it follows that the nullity of the praise and of the procedure must be dichi plows only where in the appeal, to the complaint of the vice suitable a determining them, follow the indication of the specific prejudice that it has to the right of defense.