ORS 34.470: Service when officer or other person hides or refuses admittance.

If the officer or person on whom the writ ought to be served hides from the person attempting to make service, or refuses admittance to the person attempting to make service, it may be served by affixing it in some conspicuous place on the outside, either of the dwelling house of the officer or person or the jail or other place where the party is confined.