Okla. Stat. tit. 12, § 12-1226: Notice to debtors

Such receiver shall forthwith give notice of his appointment to

the persons indebted to the defendant in attachment. The notice

shall be written or printed, and shall be served on the debtor or

debtors, by copy personally, or by copy left at the residence of the

debtor or debtors; and from the date of such service, the debtors

shall stand liable to the plaintiff in attachment for the amount of

money or credits in their hands, or due from them to the defendant

in attachment, and shall account therefor to the receiver.