The provisions of ORS 708A.470 as to rights of survivorship are determined by the form of the account at the death of a party. Subject to satisfaction of the requirements of the insured institution, the form of an account may be altered by written order given by a party to the insured institution if the party signs the order and the insured institution receives the order during the party's lifetime, and if the party does not countermand the order with another written order during the party's lifetime.
ORS 708A.475