Section 79(1)(b) in The Punjab Town Improvement Act, 1922
(b)if such person cannot be found, then by leaving the notice or bill at his last known place of abode, if within municipal limits, or by giving or tendering it to some adult male member or servant of his family, ordinarily residing with him, or by causing it to be affixed on some conspicuous part of the buildings or land (if any) to which it relates.