if the area falls within the limits of corporation, and MAP is not approved and construction is 15-20 years old and now corporation send you a notice for demolition,
First of all, Yes, Corporation can send you a notice for demolition,
and you are advised to make a reply of the notice at earliest,
and, in the meantime, get a stay from the Court disclosing facts,
you still can get the layout passed after depositing the required fee.