Colorado Code
Part 5 - Wills and Will Contracts and Custody and Deposit of Wills
§ 15-11-517. 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.
Source: L. 94: Entire part R&RE, p. 1003, § 3, effective July 1, 1995.