ORS 91.140

An owner or landlord, as defined in ORS 90.100, of a premises may take possession pursuant to ORS 105.100 to 105.168 of the premises from a squatter, as defined in ORS 90.100, after giving the person 24 hours’ written notice of the termination of the occupancy. The notice must specify the date and time by which the person must vacate and state that the cause of the termination is the person’s status as a squatter. The notice does not create a right of occupancy or tenancy for the squatter.