Okla. Stat. tit. 12A, § 12A-4A-211

CANCELLATION AND AMENDMENT OF PAYMENT ORDER

(a) A communication of the sender of a payment order canceling

or amending the order may be transmitted to the receiving bank

orally or in a record. If a security procedure is in effect between

the sender and the receiving bank, the communication is not

effective to cancel or amend the order unless the communication is

verified pursuant to the security procedure or the bank agrees to

the cancellation or amendment.

(b) Subject to subsection (a) of this section, a communication

by the sender canceling or amending a payment order is effective to

cancel or amend the order if notice of the communication is received

at a time and in a manner affording the receiving bank a reasonable

opportunity to act on the communication before the bank accepts the

payment order.

(c) After a payment order has been accepted, cancellation or

amendment of the order is not effective unless the receiving bank

agrees or a funds-transfer system rule allows cancellation or

amendment without agreement of the bank.

(1) With respect to a payment order accepted by a receiving

bank other than the beneficiary's bank, cancellation or amendment is

not effective unless a conforming cancellation or amendment of the

payment order issued by the receiving bank is also made.

(2) With respect to a payment order accepted by the

beneficiary's bank, cancellation or amendment is not effective

unless the order was issued in execution of an unauthorized payment

order, or because of a mistake by a sender in the funds transfer

which resulted in the issuance of a payment order (i) that is a

duplicate of a payment order previously issued by the sender, (ii)

that orders payment to a beneficiary not entitled to receive payment

from the originator, or (iii) that orders payment in an amount

greater than the amount the beneficiary was entitled to receive from

the originator. If the payment order is canceled or amended, the

beneficiary's bank is entitled to recover from the beneficiary any

amount paid to the beneficiary to the extent allowed by the law

governing mistake and restitution.

(d) An unaccepted payment order is canceled by operation of law

at the close of the fifth funds-transfer business day of the

receiving bank after the execution date or payment date of the

order.

Oklahoma Statutes - Title 12A. Uniform Commercial Code Page 367

(e) A canceled payment order cannot be accepted. If an

accepted payment order is canceled, the acceptance is nullified and

no person has any right or obligation based on the acceptance.

Amendment of a payment order is deemed to be cancellation of the

original order at the time of amendment and issue of a new payment

order in the amended form at the same time.

(f) Unless otherwise provided in an agreement of the parties or

in a funds-transfer system rule, if the receiving bank, after

accepting a payment order, agrees to cancellation or amendment of

the order by the sender or is bound by a funds-transfer system rule

allowing cancellation or amendment without the bank's agreement, the

sender, whether or not cancellation or amendment is effective, is

liable to the bank for any loss and expenses, including reasonable

attorney fees, incurred by the bank as a result of the cancellation

or amendment or attempted cancellation or amendment.

(g) A payment order is not revoked by the death or legal

incapacity of the sender unless the receiving bank knows of the

death or of an adjudication of incapacity by a court of competent

jurisdiction and has reasonable opportunity to act before acceptance

of the order.

(h) A funds-transfer system rule is not effective to the extent

it conflicts with paragraph (2) of subsection (c) of this section.