Section 43(3)(b) in The Maharashtra Rent Control Act, 1999
(b)When an acknowledgement purporting to be signed by the tenant or licensee or their agent received by the Competent Authority or the registered article containing the summons is received back with an endorsement purporting a have been made by a postal employee to the effect that the tenant or licensee or their agent had refused to take delivery of the registered article, the Competent Authority may proceed to hear and decide the application as if there has been a valid service of summons.