Companies Act, 1956
Sec 596 - Service on foreign company.
Any process, notice, or other document required to be served on a foreign company shall be deemed to be sufficiently served, if addressed to any person whose name has been delivered to the Registrar under the foregoing provisions of this Part and left at, or sent by post to, the address which has been so delivered:
(a) where any such company makes default in delivering to the Registrar the name and address of a person resident in India who is authorized to accept on behalf of the company service of process, notices or other documents; or
(b) if at any time all the persons whose names and addresses have been so delivered are dead or have ceased so to reside, or refuse to accept service on behalf of the company, or for any reason, cannot be served;
a document may be served on the company by leaving it at, or sending it by post to, any place of business established by the company in India.