Oregon Revised Statutes Procedure in Criminal Matters Generally § 135.065

(1) If the defendant gives no other name, the court may proceed against the defendant by the name in the accusatory instrument. If the defendant is charged by indictment or information and alleges that another name is the true name of the defendant, the court shall direct an entry thereof to be made in its register, and the subsequent proceedings on the accusatory instrument may be had against the defendant by that name, referring also to the name by which the defendant is charged. Before proceeding against the defendant as provided in this subsection, the court shall attempt to determine the true name of the defendant. If a certified copy of the record of live birth for the defendant was never issued the court shall ask the defendant, under oath or affirmation, to give the defendant's true name. The court shall proceed under the name given unless the court is persuaded by a preponderance of the evidence that the name is not the defendant's true name.

(2) Upon motion of the defendant, all names, other than the true name of the defendant, shall be stricken from any accusatory instrument read or submitted to the jury.