Dear Client,
Rectification deed is possible but it is not sure whether the sub registrar office will return the excess paid amount.
Both Seller and purchaser have to present before registrar and it will be mention in the deed that sale deed actually could be possible for 840 area as same is as per Municipal plan. (Attach Plan)
AND the Seller has returned amount paid for rest extra sq mtr to the purchaser and actual consideration paid for 840 area is ........ and 5 % stamp duty payable of the same area is calculated Rs. .......
secondly what is the stamp duty value to be paid on the same ? --- The stamp duty and registration charges will applicable as payable in the conveyance deed. Since, u have already made excess amount , there has to be recovery than paying another amount except rectification fees.