Subject to any statutory provision regulating service of process, where the suit is against a corporation, the summons may be served-
(a) on the secretary, or on any director, or other principal officer of the corporation, or
(b) by leaving it or sending it by post addressed to the corporation at the registered office, or if there is no registered office then at the place where the corporation carries on business.
Order XXIX Rule 1 CPC Subscription and verification of pleading
Order XXIX Rule 2 CPC Service on corporation
Order XXIX Rule 3 CPC Power to require personal attendance of officer of corporation