My father, his elder brother and his younger brother..all the 3 used to do joint business i.e. Kirana shop. 3 of them together used to run 2 different shops at 2 places for 15 years. The properties they earned during this were registered under each of their names, few were registered with 3 of their names together. Due to few fights, they got separated and my father got few properties which are under his brother's name. They have written all this in a normal white paper ...like who got which property etc...this paper was signed by my father and his brothers and als few people whom they 3 of them know as witnesses..Actually all the original documents are with his elder brother..Now my father's elder brother is not accepting for that agreement. How should we proceed..Is this paper accepted when we go to court....Please help us.