Query regarding property

Hi All,

Just had a query regarding the below subject.

There is a property development agreement which has been notarized in other state and the said property is at mumbai. So how can we cancel the property development agreement ? The said development agreement has been cancelled through notary in mumbai. So is it valid? What does the mumbai law say about the same? Do we need to cancel the said property development agreement through registered cancellation?.....Need your kind advise.....Thanks