R.I. Gen. Laws § 19-5-5: Shares or deposits held jointly.

Whenever payment for shares or deposits has been made in any credit union in the name of two (2) or more persons and payable to either, or any, or the survivor, payment of the amount due on the shares or deposits, or any part, or any interest, or dividend may be made to any of the persons, whether the other or others are living or not, or to the survivor or survivors of them, or to the guardian, executor, or administrator of them, and the receipt of the person or persons so paid shall be a valid and sufficient release and discharge on account of the payment so made. Nothing in this section authorizes the receipt of savings either in payment for share or on deposit in the name of two (2) or more persons unless at least one of the persons is or becomes a member of the credit union.