Washington Revised Code Title 60. Liens § 60.42.070. Delivery of notice of claim of lien--Form--Time effective--Address

Notices to be delivered to a party under this chapter, other than service of process as required in civil actions, shall be by service of process, or by registered or certified mail, return receipt requested, or by personal or electronic delivery and obtaining evidence of delivery in the form of a receipt or other paper or electronic acknowledgment by the party to whom the notice is delivered or an affidavit of service. Delivery is effective at the time of personal service, or personal or electronic delivery, or three days following deposit in the mail as required by this section. Notice to a broker or owner may be given to the address of the broker or owner that is contained in the commission agreement, or such other address as is contained in a written notice from the broker or owner to the party giving the notice. If no address is provided in the commission agreement, the notice to the broker may be given to the broker's address of record with the department of licensing pursuant to chapter 18.85 RCW and notice to the owner may be given to the address of the commercial real estate.