Oregon Revised Statutes Corporations and Partnerships § 67.255

(a) The act occurs within six months after the date of dissociation;

(b) The act would have bound the partnership under ORS 67.090 before dissociation;

(c) At the time of entering into the transaction, the other party reasonably believed that the dissociated partner was then a partner and did not have notice of the partner's dissociation; and

(d) At the time of entering into the transaction, the dissociation had not been advertised in a newspaper of general circulation in the place, or in each place if more than one, at which the partnership business is regularly carried on.