Okla. Stat. tit. 18, § 18-381.42: Deposit accounts of incompetents

When a deposit account is held in any association or federal

association by a person who becomes incompetent and an adjudication

of incompetency has been made by a court of competent jurisdiction,

such an association may pay or deliver the withdrawal value of such

deposit account and any earnings that may have accrued thereon to

the guardian or conservator for such person upon proof of the

appointment and qualification of such guardian or conservator.

However, if such association has received no written notice and is

not on actual notice that such deposit account holder has been

adjudicated incompetent, it may pay such funds to such holder or

transfer the deposit account on the order of the deposit account

holder, and such payment or transfer shall be a valid and sufficient

release and discharge of the association for the payment or transfer

so made.