Any claim or right arising out of an alleged default or breach of warranty may be discharged in whole or in part without consideration by a waiver or renunciation in a signed record delivered by the aggrieved party.
Okla. Stat. tit. 12A, § 2A-107
Oklahoma Code Comment
In a consumer lease as defined in U3C § 2-106, this provision should be read in conjunction with U3C § 1-107(2) and (3).