Thank You everyone for replies above. My scenario is : Investors has bought the flats in the society and have done just a sale agreement with the builder and the flat is lying vacant unused. Even the water /electricity / and all other fittings are not done. The property is not registered in the name of the seller. I mean the property is not at all registered. But we have to pay the money to the investor. There is man who has the keys of all such resale flats, who showed us and we selceted one and want to buy it. This middle man says come and book the flat by paying 1 lakh booking amout. But before that , i want to get it clear that I am not being cheated. As I have never met with builder or the seller. So please guide me that what all documents should I verify before going ahead.Thank You everyone for replies above. My scenario is : Investors has bought the flats in the society and have done just a sale agreement with the builder and the flat is lying vacant unused. Even the water /electricity / and all other fittings are not done. The property is not registered in the name of the seller. I mean the property is not at all registered. But we have to pay the money to the investor. There is man who has the keys of all such resale flats, who showed us and we selceted one and want to buy it. This middle man says come and book the flat by paying 1 lakh booking amout. But before that , i want to get it clear that I am not being cheated. As I have never met with builder or the seller. So please guide me that what all documents should I verify before going ahead.