ORS § 52.170
If the plaintiff is a nonresident of this state, the justice may require the plaintiff to give an undertaking with one or more sureties, or an irrevocable letter of credit issued by an insured institution, as defined in ORS 706.008, for the disbursements of the action before issuing the summons; and if at any time before the commencement of the trial the defendant applies therefor, the justice must require such plaintiff to give the undertaking or irrevocable letter of credit. If the plaintiff is a resident of this state, the justice may, in the discretion of the justice, upon a like application on the part of the defendant, require the plaintiff to give such undertaking or irrevocable letter of credit. However, if the plaintiff is a resident of Oregon and makes the affidavit that the plaintiff is unable to furnish the undertaking or irrevocable letter of credit as required by this section, the giving of such undertaking or irrevocable letter of credit shall be waived.
ORS 52.170