1. Without an Occupation Certificate, how the seller got possession, cannot be understood
2. Possession without OC is illegal
3. what if the builder fails to get OC for the building?
4. you can directly buy the flat from the seller and register the agreement and also take possession from seller
5. but without proper OC your possession will also be illegal
6. i suggest you enter into a MOU with the seller
7. you can pay certain consideration on signing of MOU and balance would be payable on receipt of OC and registration of agreement in your favour
8. if OC is not received within 6 months as represented by the seller, then you can have the option to cancel the deal and the seller has to refund your advance
9. the above course would be safer rather than risking to move into a flat in a building without an OC, unless you are adventurous enough to take the risk