NC OBC certificate doubt

Based on the pints you have raised it is incorrect of me to be using that issued certificate. As I am not resident of Bihar. *Just one additional point, our caste is Obc under both the state. Is it of any use ?*

1. My caste comes in OBC category in both Bihar and Jharkhand state 2. I have obtained my Obc certificate from Bihar based on the grandfather's land in Bihar 3. I have no additional proof to show that I am resident of Bihar other than the land deeds on my grandfather's name So is it legal to use this Obc certificate for admission in central college ? There will not be any problem in future because of this ?

But my grandfather is not alive. So by inheritance my father and my uncle will have right over thi land property of my grandfather. So technically I am not breaking any law. But yes my father was born in Jharkhand. Please give me final advice on using the certificate based on this above points.