The violation of the contradictory, which detects as reason of nullity of the praise ex art. 829, co. 1, n. 9, cod. Proc. Civ., It goes assessed in concrete and must be excluding where the contradictory it is state in any case guaranteed, and pure with different modes from the formal deposit
documents within a certain term, in respect substantial of the principle of the equality of the weapons, of which in art. 816-bis of the Italian Civil Code proc., which FA from counterbalance a that of the contradictory.