1. It is mandatory to pay Stamp Duty on the rateable value of the property & Register ANY agreement for immovable property. In Notary-Registration, said Stamp Duty in Full is not paid and Registration fees in full is not paid and neither it is known or taken on Govt. record. Hence Notarised Deed's have no legally enforceable value.
2. You can file a Police FIR, requesting investigation and charge-sheet, for offences like cheating, intimidation, fraud against the person, supported with all relevant supporting documents.
3. IF the Police does not take action, THEN you can file private criminal case u/s 156(3) Cr.P.C., in the local Magistrates court, seeking directions to the Police to investigate and file charge sheet. The said Person may come down for settlement.
Keep Smiling .... Hemant Agarwal