Miss. Code Ann. § 81-12-137: Accounts in the name of two (2) or more persons.

(1) Accounts may be in the name of two (2) or more persons, whether minor or adult, in such form that the monies in the accounts are payable to either, or the survivor or survivors, and such money due under such accounts and all additions thereto shall be the property of such persons as joint tenants with the right of survivorship. The monies due under such accounts may be paid to or on the order of any one (1) of such persons during his lifetime or to or on the order of any one (1) of the survivors of them after the death of any one or more of them. The opening of the account in such form shall be conclusive evidence as to the liability of the association only in any action or proceeding to which the association is a party, of the intention of all of the parties to the account to vest title to money due under the account and the additions thereto in such survivor or survivors. By written instructions given to the association by all the parties to the account, the signatures of more than one (1) of such persons during their lifetime or of more than one (1) of the survivors after the death of any one (1) of them may be required for withdrawal, in which case the association shall pay the monies in the account only in accordance with such instructions, but no such instructions shall limit the right of the survivor or survivors to receive the money in the account. By written agreement with the association, any person may create a joint account with other persons as joint tenants with the right of survivorship and said agreement may be signed only by the persons creating said account.

(2) The association, unless instructed in writing to the contrary, may loan money to any one or more persons constituting a single membership or account as joint tenants with the right of survivorship, and any person authorized to make withdrawals as provided in this section may pledge, hypothecate or assign all or any part of the money due or to become due under such account. Any such pledge, hypothecation or assignment or any increase to or withdrawal from the account shall not destroy the joint tenancy with right of survivorship.

(3) Payment of all or any of the monies in such account, as provided in this section, shall discharge the association from liability with respect to the monies so paid, prior to receipt by the association of a court order. After receipt of such court order, an association may refuse, without liability, to honor any withdrawal on the account pending determination of the rights of the parties. No association paying any survivor 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.