Washington Revised Code Title 60. Liens § 60.34.020. Notice of lien--Contents--Filing and serving

The lien claimant shall within thirty days after he or she has ceased to perform such labor, file for record with the auditor of the county in which the labor was performed a notice of claim, containing a statement of his or her demand, the name of the employer and the name of the person employing him or her, if known, with a statement of the terms and conditions of his or her contract, if any, and the time he or she commenced the employment, and the date of his or her last service, and shall serve or mail a copy thereof to said employer within said period.