Bank deposits may be made in the name of two or more persons, including minors, payable to either or any of them, or payable to either or any of the survivors or the sole survivor, and the deposits or any part thereof and any interest thereon, may be paid to or on order of any of the persons whether the other or others are living or not. The receipt, order or acquittance of the persons so paid is a valid and sufficient release and discharge to the bank for any payments so made.
A.R.S. § 6-235