Washington Revised Code Title 84. Property Taxes § 84.64.200. County as bidder at sale--Purchaser to pay all delinquent taxes, interest, or costs

(1) At all sales of property for which certificates of delinquency are held by the county, if no other bids are received, the county must be considered a bidder for the full area of each tract or lot to the amount of all taxes, interest, and costs due thereon, and where no bidder appears, acquire title in trust for the taxing districts as absolutely as if purchased by an individual under the provisions of this chapter.

(2) All bidders except the county at sales of property for which certificates of delinquency are held by the county must pay the full amount of taxes, interest, and costs for which judgment is rendered, together with all taxes, interest, and costs which are delinquent at the time of sale, regardless of whether the taxes, interest, or costs are included in the judgment.