Res judicata from the viewpoint of defendant

Defendant can use the whole of defense styles to defend versus claim of plaintiff. Defendant should use huge option versus claim of plaintiff by good choosing and appropriate time. With respect to forbiddance of issuance of conflict judgments principle, in case of issuance of absolute judgment in favor of plaintiff, cause of mentioned judgment is of res judicata, so there is not possibility of bringing new action for its defacing. the same reason causes that defendant cannot bring new action into former judgment according to Supreme Court decision as a unified judicial precedent, number 3746 date 1338/8/3. It is not possible to bring the action for annulment of document to juridical act (cause of former action) which official document is regulated according to that. However, it is possible to bring the action for annulment of document for the registered deed itself to judicial act because of not having res judicata.