Okla. Stat. tit. 12, § 12-303
Libel or slander - Alleging publication concerning
plaintiff.
In an action for libel or slander, it shall be sufficient to
state, generally, that the defamatory matter was published or spoken
of the plaintiff; and if the allegation be denied, the plaintiff
must prove, on the trial, the facts, showing that the defamatory
matter was published or spoken of him.
R.L. 1910, § 4776.