It is possible to challenge an act that constitutes the ground of a pending execution proceeding or a lawsuit for forgery. Regarding the ordinary acts, the claim of forgery can be made under the form of an objection in execution proceedings and under the form of a defence argument in lawsuits. Conversly, an official act can only be challenged for forgery by filing a lawsuit in order to obtain a declaratory judgement for the establishment of forgery. Nevertheless, in both cases the claim of forgery has to be proved. The legal consequences of forgery are regulated separately both for official and ordinary acts under the Code of Civil Procedure, article 209. Pursuant to the Code, an ordinary act which is challenged for forgery cannot be used as a ground either for an execution proceeding or for a lawsuit. However, an official act may constitute the ground of an execution proceeding and/or a lawsuit unless the alleged forgery is established by a court decision. The claim of forgery may even constitute the ground of a lawsuit by itself. The divisions of the High Court declare different opinions on the effects of such a lawsuit on the execution proceedings. On the other hand, pursuant to the Code of Civil Procedure, article 209, if a lawsuit for forgery is initiated before a civil court or a criminal court, the related execution proceeding will be suspended ipso facto. Therefore, in this scenario, an interim injunction decision is not required to suspend the execution proceedings. If, as the final decision of a lawsuit, it is proven that the act is not forged, it is possible to remove the suspension on the execution proceedings by an interim injunction decision.