Okla. Stat. tit. 12, § 12-32: Entry on return of summons

He shall, upon the return of every summons, enter upon the

appearance docket whether or not service has been made; and, if the

summons has been served, the name of the defendant or defendants

summoned and the day and manner of the service upon each one. The

entry shall be evidence in case of the loss of the summons.