15 year back my father purchased 1bigha agricultural land in our vilage( west Bengal). and my uncle was cultivating on this land as my father was posted outside for his job. now due to some monitory problem father want to sell the land but my uncle saying we can't sell this until we register 50% land to his name.
please advise, whether his demand is legaly valid. my father never given any lease or received any crops from him.