Section 66 of THE BHARATIYA NAGARIK SURAKSHA SANHITA, 2023 – BNSS

Service when persons summoned cannot be found.

66. Where the person summoned cannot, by the exercise of due diligence, be found,
    the summons may be served by leaving one of the duplicates for him with some adult
    member of his family residing with him, and the person with whom the summons is so left
    shall, if so required by the serving officer, sign a receipt therefor on the back of the other
    duplicate.
    Explanation.—A servant is not a member of the family within the meaning of this
    section.

Read more Section 30 of THE BHARATIYA NAGARIK SURAKSHA SANHITA, 2023 – BNSS