Section 18(3)(b) in The Bharatiya Vayuyan Adhiniyam, 2024
(b)if it cannot be so delivered or tendered, by delivering or tendering it to any officer of such owner or person or any adult member of the family of such owner or person or by affixing a copy thereof on the outer door or on some conspicuous part of the premises in which such owner or person is known to have last resided or carried on business or personally worked for gain or delivering by mail or any other electronic means; or