Caveat lodging secures notice rights and permits interim relief on urgency when properly filed and served. A caveat may be lodged in triplicate on payment of the prescribed fee and after serving or sending a copy by registered post to the expected petitioner or appellant; it must be in Form NCLT 3C and state the orders or directions and the authority challenged together with a full address for service so the proceeding can be served before it is taken up, subject to the Tribunal's power to pass interim orders in case of urgency and a limited validity period from filing.