Mississippi Code Title 91. Trusts and Estates § 91-8-303

(1) A conservator or guardian may represent and bind the estate that the conservator or guardian controls;

(2) A conservator or guardian may represent and bind the ward if a conservator or guardian of the ward's estate has not been appointed;

(3) An agent having authority to act with respect to the particular question or dispute may represent and bind the principal;

(4) A trustee may represent and bind the beneficiaries of the trust;

(5) A personal representative of a decedent's estate may represent and bind persons interested in the estate;

(6) A parent may represent and bind the person's minor or unborn child if a conservator or guardian for the descendant has not been appointed;

(7) A grandparent may represent the grandparent's grandchild if that grandchild is not already represented by a parent under paragraph (6);

(8) A person designated by the settlor either in the trust instrument or in a writing delivered to the trustee, or designated in a writing delivered to the trustee by a trust protector or trust advisor with power under the terms of the trust instrument to represent the beneficiaries of the trust, may represent and bind the beneficiaries; and

(9) Any person acting in a fiduciary capacity shall exercise all rights and powers granted to a fiduciary under the Revised Uniform Fiduciary Access to Digital Assets Acts created under Chapter 23, Title 91.