67. If service cannot by the exercise of due diligence be effected as provided in section 64, section 65 or section 66, 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 Court, after making such inquiries as it thinks fit, may either declare that the summons has been duly served or order fresh service in such manner as it considers proper.
Bharatiya Nagarik Suraksha Sanhita, 2023
Section 61 Power, on escape, to pursue and retake
Section 62 Arrest to be made strictly according to Sanhita
Section 65 Service of summons on corporate bodies, firms, and societies
Section 66 Service when persons summoned cannot be found
Section 67 Procedure when service cannot be effected as before provided
Section 68 Service on Government servant
Section 69 Service of summons outside local limits
Section 70 Proof of service in such cases and when serving officer not present