Colorado Revised Statutes Title 15. Probate, Trusts, and Fiduciaries § 15-5-604. Limitation on action contesting validity of revocable trust

(2) Upon the death of the settlor of a trust that was revocable at the settlor's death, the trustee may proceed to distribute the trust property in accordance with the terms of the trust. The trustee is not subject to liability for doing so unless:

(3) Unless a distribution or payment no longer can be questioned because of adjudication, estoppel, or limitation, a beneficiary of a trust that is determined to have been invalid, or a distributee of property improperly distributed or paid, or a claimant who is improperly paid, is liable for the return of the property improperly received and its income, if any, since the distribution, if he or she has the property. If he or she does not have the property, then he or she is liable for the return of the value as of the date of his or her disposition of the property improperly received, and its income and gain, if any received by him or her.