Oregon Revised Statutes Justice Courts § 53.030

An appeal is taken by serving, within 30 days after rendition of judgment, a written notice thereof on the adverse party, or the attorney of the adverse party, and filing the original with the proof of service indorsed thereon with the justice, and by giving the undertaking for the costs and disbursements on the appeal, as provided in ORS 53.040. A written acknowledgment of service by the respondent or the attorney of the respondent, indorsed on the notice of appeal, shall be sufficient proof of service. When the notice of appeal has been served and filed, the appellate court shall have jurisdiction of the cause.