Section 44

When the person to be summoned cannot, by the exercise of due diligence, be found and service cannot be effected as directed by section 43(4) the serving officer shall affix a copy of the summons to some conspicuous part of the house or place in which the person summoned ordinarily resides, and in such case the summons, if the court so directs either before or after such affixing, shall be deemed to have been duly served.[43