My father has one son(elder) and two daughter(both married and staying in different state). My father is mentally disable from past 1 year and my elder brother is trying to take the advantage of it. He is tryng to get sign of my father on all property papers. Me and my Sister is not staying in westbengal(our residance).WE have given a verbal notice to my brother but his is not ready to accept any right of married sisters in the property. How can we immedately stop my brother to do so. Please advice.