Mississippi Code Title 91. Trusts and Estates § 91-8-604

(a) A person may commence a judicial proceeding to contest the validity of all or part of the terms of a trust that was revocable at the settlor's death within the earlier of:

(b) 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 subject to liability for doing so only if:

(c) A beneficiary of a trust that is determined by a court proceeding to be invalid, in whole or in part, is liable to return to the court any distribution received for proper distribution to the extent that the invalidity applies to the distribution. If the beneficiary refuses to return the distribution after being ordered by the court, the beneficiary shall be liable for all costs incurred for recovery of the distribution.