Wash. Rev. Code § 51.48.160
If any warrant issued under this title is not paid within thirty days after it has been filed with the clerk of the superior court, or if any employer is delinquent, for three consecutive reporting periods, in the transmission to the department of taxes due, the department may, by order issued under its official seal, revoke the certificate of coverage of the employer against whom the warrant was issued; and if the order is entered, a copy thereof shall be posted in a conspicuous place at the main entrance to the employer's place of business and shall remain posted until such time as the warrant has been paid. Any certificate so revoked shall not be reinstated, nor shall a new certificate of coverage be issued to the employer, until the amount due on the warrant has been paid, or provisions for payment satisfactory to the department have been entered, and until the taxpayer has deposited with the department such security for payment of any taxes, increases, and penalties, due or which may become due in an amount and under such terms and conditions as the department may require, but the amount of the security shall not be greater than one-half the estimated average annual taxes of the employer.
RCW 51.48.160