ধারা ৭১Procedure when service cannot be effected as before provided

71. If service in the manner mentioned in sections 69 and 70 cannot by the exercise of due diligence be effected, the serving officer shall affix one of the duplicates of the summons to some conspicuous part of the house or homestead in which the person summoned ordinarily resides; and thereupon the summons shall be deemed to have been duly served.