Okla. Stat. tit. 12A, § 12A-2A-516

Burden of Establishing Default After Acceptance; Notice of Claim or

Litigation to Person Answerable Over.

EFFECT OF ACCEPTANCE OF GOODS; NOTICE OF DEFAULT;

BURDEN OF ESTABLISHING DEFAULT AFTER ACCEPTANCE;

NOTICE OF CLAIM OR LITIGATION TO PERSON

ANSWERABLE OVER

(1) A lessee must pay rent for any goods accepted in accordance

with the lease contract, with due allowance for goods rightfully

rejected or not delivered.

(2) A lessee's acceptance of goods precludes rejection of the

goods accepted. In the case of a finance lease, if made with

knowledge of a nonconformity, acceptance cannot be revoked because

of it. In any other case, if made with knowledge of a

nonconformity, acceptance cannot be revoked because of it unless the

acceptance was on the reasonable assumption that the nonconformity

would be seasonably cured. Acceptance does not of itself impair any

other remedy provided by this article or the lease agreement for

nonconformity.

(3) If a tender has been accepted:

(a) within a reasonable time after the lessee discovers or

should have discovered any default, the lessee shall

notify the lessor and the supplier, if any, or be

barred from any remedy against the party not notified;

Oklahoma Statutes - Title 12A. Uniform Commercial Code Page 269

(b) except in the case of a consumer lease, within a

reasonable time after the lessee receives notice of

litigation for infringement or the like (Section 2A-

211 of this title) the lessee shall notify the lessor

or be barred from any remedy over for liability

established by the litigation; and

(c) the burden is on the lessee to establish any default.

(4) If a lessee is sued for breach of a warranty or other

obligation for which a lessor or a supplier is answerable over the

following apply:

(a) the lessee may give the lessor or the supplier, or

both, written notice of the litigation. If the notice

states that the person notified may come in and defend

and that if the person notified does not do so that

person will be bound in any action against that person

by the lessee by any determination of fact common to

the two litigations, then unless the person notified

after seasonable receipt of the notice does come in

and defend that person is so bound.

(b) the lessor or the supplier may demand in writing that

the lessee turn over control of the litigation

including settlement if the claim is one for

infringement or the like (Section 2A-211 of this

title) or else be barred from any remedy over. If the

demand states that the lessor or the supplier agrees

to bear all expense and to satisfy any adverse

judgment, then unless the lessee after seasonable

receipt of the demand does turn over control the

lessee is so barred.

(5) Subsections (3) and (4) of this section apply to any

obligation of a lessee to hold the lessor or the supplier harmless

against infringement or the like (Section 2A-211 of this title).