Section 38(1)(c) in Goa Waste Management Corporation Act, 2016
(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 chief officer of that body, corporation or society at it's principal office and is either,-(i)sent under a certificate of posting or by registered post; or(ii)left at that office or at the place of establishment;