I want to know about possession act because we have flat in western area,my aunty (father sister) are staying their since last 35 year. My aunty n her sons now staying in that flat. The flat owner was my grandfather, he gave that flat for few days to stay my aunty because she have no any room. but now she and her son doesnt want to walk out from flat. They said that they have ration card, possession of flat from last 35 year so the flat is now on thier name. The share of that flat is on my grandfather name, no any deed we made because this is family matter and mutual consent by my grandfather. Advise me what can i do in this matter ?