Proof of the execution of any conveyance may be made before any officer authorized to take acknowledgments of deeds, and shall be made by a subscribing witness thereto, who shall state the place of residence of the witness, and that the witness knew the person described in and who executed the conveyance. Such proof shall not be taken unless the officer is personally acquainted with the subscribing witness, or has satisfactory evidence that the witness is the same person who was a subscribing witness to the instrument.
Oregon Legal Code