Section 20(3)(b) in The Rajasthan Public Trust Rules, 1962
(b)The summons shall be deemed to have been duly served on the person summoned;(i)if it is sent by registered post and an acknowledgement or refusal thereof has been received, or(ii)if it is affixed at a conspicuous place in the house or locality in the presence of two witnesses on the refusal of acceptance by the concerned person, or(iii)if it is published in a newspaper having circulation in the locality.