Okla. Stat. tit. 12A, § 4A-211
Oklahoma Code Comment
There has been some litigation under law prior to Article 4A over cancellation of payment orders. See the Mellon, Delbrueck & Co. and Banque Worms cases and their resolution under Article 4A discussed in the introductory comment.
The time and manner of receipt of a cancellation order or amendment is subject to definition by agreement (with the originator) or by funds transfer system rule (with other senders). This definition may cover the content of the communication, the minimum time which the recipient must have to react and the person at the recipient who must receive the communication. An exact description may be required; however, efforts by the recipient to accommodate the sender may make the recipient liable to cancel or amend an order which it cannot identify. See Parr v. Security National Bank, 680 P. 2d 648 (Okla 1984).
A funds transfer system rule may allow cancellation or amendment of an accepted payment order without agreement of the receiving bank, but only for the reasons set forth in subsection (c)(2) of this section. If such an amendment or cancellation occurs, the sender is liable to the receiving bank for any loss and expenses, including reasonable attorney's fees, incurred by the bank as a result. Once a payment order has been accepted, the sender has no "right" to "stop payment" and generally a payment order cannot be canceled or amended after it has been accepted. The receiving bank may agree to an amendment or cancellation. By doing so the receiving bank could have liability to the beneficiary. It would have had no liability if it had refused the request. If the receiving bank agrees to such an amendment or cancellation, the sender is liable to the receiving bank for any loss and expenses, including reasonable attorney's fees, incurred by the bank as a result of its agreement.