N.M. Stat. § 58-10-62
Any association or federal association may accept savings accounts in the name of any administrator, executor, custodian, conservator, guardian, trustee or other fiduciary for a named beneficiary or beneficiaries. The fiduciary may vote as a member as if the membership were held absolutely, and he may open, make additions to and withdraw any such account in whole or in part. The withdrawal value of the account and earnings thereon or other rights relating thereto may be paid or delivered in whole or in part to the fiduciary without regard to any notice to the contrary as long as the fiduciary is living. Payment or delivery to the fiduciary, or a receipt or acquittance signed by the fiduciary to whom the payment or delivery of rights is made, is a valid release and discharge of the association for the payment or delivery made. Whenever a person holding an account in a fiduciary capacity dies and no written notice of the revocation or termination of the fiduciary relationship has been given to the association, and the association has no written notice of any other disposition of the beneficial estate, the withdrawal value of the account and earnings thereon or other rights relating thereto may, at the option of the association, be paid and delivered in whole or in part to the beneficiary, beneficiaries or to a legally authorized successor fiduciary. Whenever an account is opened by any person describing himself in opening the account as trustee for another and no other notice of the existence and terms of a legal and valid trust than this description has been given in writing to the association, in the event of the death of the person described as trustee, the withdrawal value of the account or any part thereof, together with the earnings thereon, may be paid to the person for whom the account was thus described to have been opened or to a legally authorized successor trustee. Payment and delivery to any beneficiary, beneficiaries or designated person, or a receipt or acquittance signed by any beneficiary, beneficiaries or designated person for any payment or delivery, is a valid release and discharge of the association for the payment or delivery made. No association paying any fiduciary, beneficiary or designated person in accordance with the provisions of this section is liable for any estate, inheritance or succession taxes which may be due to this state.
NMS § 58-10-62