Okla. Stat. tit. 22, § 22-787: Manner of return

Unless the parties otherwise consent by an endorsement upon the

commission, the court or judge must endorse thereon the direction

and manner in which it must be returned, and may in his discretion

direct that it be returned by mail or otherwise, addressed to the

clerk of the court in which the action is pending, designating his

name, and the place where his office is kept.