Miss. Code Ann. § 81-12-139: Accounts of administrators, executors, guardians, trustees, and other fiduciaries.

Any association may accept accounts in the name of any administrator, executor, guardian, trustee or other fiduciary in trust for a named beneficiary or beneficiaries. Any such fiduciary shall have power to vote as a member as if any membership account were held absolutely, to make payments upon, and to withdraw any such account, in whole or in part. The withdrawal value of any such account, or other rights relating thereto may be paid or delivered, in whole or in part, to such fiduciary, without regard to any notice to the contrary, as long as such fiduciary is living. The payment or delivery to any such fiduciary or a receipt of acquittance signed by any such fiduciary to whom any such payment or any such delivery of rights is made shall be valid and sufficient release and discharge of any association for the payment or delivery so made. Whenever a person holding an account in a fiduciary capacity dies and no written notice of the revocation or termination of t he trust relationship shall have been given to an association and the association has no notice of any other disposition of the trust estate, the withdrawal value of such account, or other rights relating thereto may, at the option of an association, be paid or delivered, in whole or in part, to the beneficiary or beneficiaries of such trust. Whenever an account shall be opened by any person describing himself in opening such account as trustee for another and there is no other or further notice of the existence and terms of a legal and valid trust, then such description shall be given in writing to such association. In the event of the death of the person so described as trustee, the withdrawal value of such account or any part thereof may be paid to the person for whom the account was thus stated to have been opened, and such account and all additions thereto shall be the property of such person, unless prior to payment the trust agreement is presented to the association showing a contrary interest. When made in accord with this section, the payment or delivery to any such beneficiary, beneficiaries or designated person, or a receipt or acquittance signed by any such beneficiary, beneficiaries or designated person for any such payment or delivery shall be valid and sufficient release and discharge of an association for the payment or delivery so made. Trust accounts permitted by this chapter shall not be required to be acknowledged and recorded. When an account is opened in a form described in this section, the right set forth in Section 81-12-145 shall apply. No association paying any beneficiary in accordance with the provisions of this section shall thereby be liable for any estate, inheritance or succession taxes which may be due this state.