There is three standard security taken over real estate: voluntary mortgage, retention of title and seizure. Concerning mortgage, it should be formalised through public deed or by a certified private document. To produce its legal effects, a mortgage must be registered at the land registry office. As for the retention of title, it should be incorporated using a duly authenticated contract or public deed and is also subject to registration at the land registry office so it can be used against any third parties. Finally, a seizure is done through a lawsuit and is not subject to specific conditions. The mortgage is by far the most widely used security.