Oregon Revised Statutes Property Rights and Transactions § 98.450

(1) If a person mails or sends goods, newspapers or periodicals of a value of less than $20 to a person in this state without first receiving an order for such items, the items are conclusively presumed to be a gift and no obligation shall accrue against the recipient.

(2) If a person deliberately and intentionally mails or sends goods, newspapers, or periodicals of a value in excess of $20 to a person in this state without first receiving an order for such items, the items are presumed to be a gift.