Section 14(1)(c) in The Tamil Nadu Acquisition of Land for Industrial Purposes Act, 1997
(c)where the person to be served is a statutory public body or a corporation or a society or other body, if the document is addressed to the Secretary, Treasurer or other head officer of that body, corporation or society at its principal office and is either:-(i)sent under a certificate of posting or by registered post; or(ii)left at that office;