Section 67 of THE BHARATIYA NAGARIK SURAKSHA SANHITA, 2023 – BNSS

Procedure when service cannot be effected as before provided.

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.

Read more Section 29 of THE BHARATIYA NAGARIK SURAKSHA SANHITA, 2023 – BNSS