Wash. Rev. Code § 51.48.140
If a notice of appeal is not served on the director and the board of industrial insurance appeals pursuant to RCW 51.48.131 within thirty days from the date of service of the notice of assessment, or if a final decision and order of the board of industrial insurance appeals in favor of the department is not appealed to superior court in the manner specified in RCW 34.05.510 through 34.05.598, or if a final decision of any court in favor of the department is not appealed within the time allowed by law, then the amount of the unappealed assessment, or such amount of the assessment as is found due by the final decision and order of the board of industrial insurance appeals or final decision of the court shall be deemed final and the director or the director's designee may file with the clerk of any county within the state a warrant in the amount of the notice of assessment. The clerk of the county wherein the warrant is filed shall immediately designate a superior court cause number for such warrant, and the clerk shall cause to be entered in the judgment docket under the superior court cause number assigned to the warrant, the name of such employer mentioned in the warrant, the amount of the taxes and penalties due thereon, and the date when such warrant was filed. The aggregate amount of such warrant as docketed shall become a lien upon the title to, and interest in all real and personal property of the employer against whom the warrant is issued, the same as a judgment in a civil case duly docketed in the office of such clerk. The sheriff shall thereupon proceed upon the same in all respects and with like effect as prescribed by law with respect to execution or other process issued against rights or property upon judgment in the superior court. Such warrant so docketed shall be sufficient to support the issuance of writs of garnishment in favor of the state in a manner provided by law in case of judgment, wholly or partially unsatisfied. The clerk of the court shall be entitled to a filing fee under RCW 36.18.012(10), which shall be added to the amount of the warrant. A copy of such warrant shall be mailed to the employer within three days of filing with the clerk.
RCW 51.48.140
Effective date-1989 c 175: See note following RCW 34.05.010.