RCW 18.86.070: Duration of agency relationship.

(1) The agency relationships established pursuant to this chapter continue until the earliest of the following:

(a) Completion of performance by the broker;

(b) Expiration of the term agreed upon by the parties;

(c) Termination of the relationship by mutual agreement of the parties; or

(d) Termination of the relationship by notice from either party to the other. However, such a termination does not otherwise affect the contractual rights of either party.

(2) Except as otherwise agreed to in writing, a broker owes no further duty after termination of the agency relationship, other than the duty:

(a) To account for all moneys and property received during the relationship; and

(b) To not disclose confidential information.