Okla. Stat. tit. 12A, § 12A-3-304: Overdue Instrument

OVERDUE INSTRUMENT

(a) An instrument payable on demand becomes overdue at the

earliest of the following times:

(1) on the day after the day demand for payment is duly

made;

(2) if the instrument is a check, ninety (90) days after

its date; or

(3) if the instrument is not a check, when the instrument

has been outstanding for a period of time after its

date which is unreasonably long under the

circumstances of the particular case in light of the

nature of the instrument and usage of the trade.

(b) With respect to an instrument payable at a definite time

the following rules apply:

(1) If the principal is payable in installments and a due

date has not been accelerated, the instrument becomes

overdue upon default under the instrument for

nonpayment of an installment, and the instrument

remains overdue until the default is cured;

(2) If the principal is not payable in installments and

the due date has not been accelerated, the instrument

becomes overdue on the day after the due date; and

(3) If a due date with respect to principal has been

accelerated, the instrument becomes overdue on the day

after the accelerated due date.

(c) Unless the due date of principal has been accelerated, an

instrument does not become overdue if there is default in payment of

interest but no default in payment of principal.