BNS Clause 14

Nothing is an offence which is done by a person who is, or who by reason of a mistake of fact and not by reason of a mistake of law in good faith believes himself to be, bound by law to do it.

website – https://www.leadindia.law/indian-kanoon/bharatiya-nyaya-sanhita-bns/chapter-3-general-exceptions/clause-14-act-done-by-a-person-bound-or-by-mistake-of-fact-believing-himself-bound-by-law