Okla. Stat. tit. 60, § 60-1601.9: Methods and waiver of notice

A. Notice to a person under this act or the sending of a

document to a person under this act must be accomplished in a manner

reasonably suitable under the circumstances and likely to result in

receipt of the notice or document. Permissible methods of notice or

for sending a document include first-class mail, personal delivery,

delivery to the person's last-known place of residence or place of

business, or a properly directed electronic message.

B. Notice otherwise required under this act or a document

otherwise required to be sent under this act need not be provided to

a person whose identity or location is unknown to and not reasonably

ascertainable by the trustee.

C. Notice under this act or the sending of a document under

this act may be waived by the person to be notified or sent the

document.

D. Notice of a judicial proceeding must be given as provided in

the applicable rules of civil procedure.