Okla. Stat. tit. 12A, § 1-9-404
Oklahoma Code Comment
Under section 9-404(b) , an account debtor with a claim against the assignor of an obligation may not obtain an affirmative recovery from the assignee of an account, chattel paper, or a payment intangible. This follows the better reasoned decisions under former law. There are some special rules in consumer transactions. See also Oklahoma Comment to section 9-403 .