Wash. Rev. Code § 84.64.120
Appellate review of the judgment of the superior court may be sought as in other civil cases. However, review must be sought within thirty days after the entry of the judgment and the party taking such appeal shall deposit a sum equal to all taxes, interest, and costs with the clerk of the court, conditioned that the appellant shall prosecute the appeal with effect, and will pay the amount of any taxes, interest and costs which may be finally adjudged against the real property involved in the appeal by any court having jurisdiction of the cause. No appeal shall be allowed from any judgment for the sale of land or lot for taxes unless the party taking such appeal shall before the time of giving notice of such appeal, and within thirty days herein allowed within which to appeal, deposit with the clerk of the court of the county in which the land or lots are situated, an amount of money equal to the amount of the judgment and costs rendered in such cause by the trial court. If, in case of an appeal, the judgment of the lower court shall be affirmed, in whole or in part, the supreme court or the court of appeals shall enter judgment for the amount of taxes, interest and costs, with damages not to exceed twenty percent, and shall order that the amount deposited with the clerk of the court, or so much thereof as may be necessary, be credited upon the judgment so rendered, and execution shall issue for the balance of the judgment, damages and costs. The clerk of the supreme court or the clerk of the division of the court of appeals in which the appeal is pending shall transmit to the county treasurer of the county in which the land or lots are situated a certified copy of the order of affirmance, and it shall be the duty of such county treasurer upon receiving the same to apply so much of the amount deposited with the clerk of the court, as shall be necessary to satisfy the amount of the judgment of the supreme court, and to account for the same as collected taxes. If the judgment of the superior court shall be reversed and the cause remanded for a rehearing, and if, upon a rehearing, judgment shall be rendered for the sale of the land or lots for taxes, or any part thereof, and such judgment be not appealed from, as herein provided, the clerk of such superior court shall certify to the county treasurer the amount of such judgment, and thereupon it shall be the duty of the county treasurer to certify to the county clerk the amount deposited with the clerk of the court, and the county clerk shall credit such judgment with the amount of such deposit, or so much thereof as will satisfy the judgment, and the county treasurer shall be chargeable and accountable for the amount so credited as collected taxes. Nothing herein shall be construed as requiring an additional deposit in case of more than one appeal being prosecuted in the proceeding. If, upon a final hearing, judgment shall be refused for the sale of the land or lots for the taxes, interest, and costs, or any part thereof, in the proceedings, the county treasurer shall pay over to the party who shall have made such deposit, or his or her legally authorized agent or representative, the amount of the deposit, or so much thereof as shall remain after the satisfaction of the judgment against the land or lots in respect to which such deposit shall have been made.
RCW 84.64.120
Rules of court: Cf. RAP 5.2, 8.1, 18.22.
Severability-1988 c 202: See note following RCW 2.24.050.