Miss. Code § 31-25-47
The bank may enter into agreements or contracts with any bank, trust companies, banking or financial institutions within or without the state as may be necessary, desirable or convenient in the opinion of the bank for rendering services to the bank in connection with the care, custody or safekeeping of municipal bonds or other investments held or owned by the bank and services in connection with the payment or collection of amounts payable as to principal or interest, and for services in connection with the delivery to the bank of municipal bonds or other investments purchased by it or sold by it, and to pay the cost of those services. The bank may also, in connection with any of the services to be rendered by any banks, trust companies or banking or financial institutions as to the custody and safekeeping of any of its municipal bonds or investments, require security in the form of collateral bonds, surety agreements or security agreements in such form and amount as, in the opinion of the bank, is necessary or desirable for the purpose of the bank.
Miss. Code § 31-25-47