ORS 93.180: Forms of tenancy in conveyance or devise to two or more persons.

(1) A conveyance or devise of real property, or an interest in real property, that is made to two or more persons:

      (a) Creates a tenancy in common unless the conveyance or devise clearly and expressly declares that the grantees or devisees take the real property with right of survivorship.

      (b) Creates a tenancy by the entirety if the conveyance or devise is to spouses married to each other unless the conveyance or devise clearly and expressly declares otherwise.

      (c) Creates a joint tenancy as described in ORS 93.190 if the conveyance or devise is to a trustee or personal representative.

      (2) A declaration of a right to survivorship creates a tenancy in common in the life estate with cross-contingent remainders in the fee simple.

      (3) Except as provided in ORS 93.190, joint tenancy in real property is abolished and the use in a conveyance or devise of the words “joint tenants” or similar words without any other indication of an intent to create a right of survivorship creates a tenancy in common.