The Governor of Reserve Bank of India D Subbarao said that RBI is serious about problem of fake currency and Banks and Police have been directed to take strict action in such cases and to ensure prevention of fake currency. Addressing a meeting of Rajasthan Chamber of Commerce in Jaipur today Mr Subbarao said that RBI has instructed banks to ensure clean notes also.He said that plastic currency will be introduced in the country and it will be started with 10 Rs note.