HRS §560:2-517
Penalty for Contesting a Will Is Not Enforceable
If a will says a person will lose something for challenging the will or starting other estate court cases, that penalty cannot be enforced when the person had a good reason to start the case.
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The statute, as written — Penalty clause for contest
A provision in a will purporting to penalize an interested person for contesting the will or instituting other proceedings relating to the estate is unenforceable if probable cause exists for instituting proceedings.
LawTrove is not legal advice. The summary above is a computer-generated restatement — the authoritative text is the official version linked above.