That may not be correct. If the prior renter invited this person to move in as a roommate, and this was permitted under the prior rental agreement then the roommate may be entitled to receive the proper notices to vacate under Oregon's Landlord Tenant Law. Oregon's Landlord Tenant Laws are pretty strict and failure to follow the rules on the landlords part can expose the landlord to fines and penalties. So we can't say that the roommate absolutely has no right to be there. I don't do much with Landlord Tenant Law to they really need to figure this out with an attorney that specializes in Oregon's Landlord Tenant Law.