Okla. Stat. tit. 12A, § 12A-1-9-209: Duties of secured party if account debtor has been

notified of assignment.

DUTIES OF SECURED PARTY IF ACCOUNT

DEBTOR HAS BEEN NOTIFIED OF ASSIGNMENT

(a) Except as otherwise provided in subsection (c) of this

section, this section applies if:

(1) there is no outstanding secured obligation; and

(2) the secured party is not committed to make advances, incur

obligations, or otherwise give value.

(b) Within ten (10) days after receiving a signed demand by the

debtor, a secured party shall send to an account debtor that has

received notification under subsection (a) of Section 1-9-406 of

this title or subsection (b) of Section 12-106 of this title of an

assignment to the secured party as assignee a signed record that

releases the account debtor from any further obligation to the

secured party.

(c) This section does not apply to an assignment constituting

the sale of an account, chattel paper, or payment intangible.