Dear Sir, my father and brother used to own undevided 1500 yards of land. both of them gifted that land to me and my two sisters through valid registration four years ago. At the time of registration the land was under mortgage. The registration was done not knowing it was with the bank. Once I found out, recently I cleared all the loans on the land and got it mutated onto our name after paying the vacant land taxes. Bank released the papers with successor clause. Without my knowledge, my father took the papers from the bank, unilaterally cancelled the gift deed and sold 750 yards of the land to some local goondas through a sale deed. Is the sale deed valid? how should I approach. on the same note, One of my sisters took bank loan on her share already. the original 1500yards hasn't been partitioned in between three of us yet. Please help me with proper guidance. thanks in advance