Okla. Stat. tit. 12A, § 12A-1-9-624: Waiver

WAIVER

(a) A debtor or secondary obligor may waive the right to

notification of disposition of collateral under Section 1-9-611 of

this title only by an agreement to that effect entered into and

signed after default.

(b) A debtor may waive the right to require disposition of

collateral under subsection (e) of Section 1-9-620 of this title

only by agreement to that effect entered into and signed after

default.

(c) Except in a consumer-goods transaction, a debtor or

secondary obligor may waive the right to redeem collateral under

Section 1-9-623 of this title only by an agreement to that effect

entered into and signed after default.