RCW 84.68.080: Action to recover property sold for taxes—Tender is condition precedent.

Hereafter no action or proceeding shall be commenced or instituted in any court of this state for the recovery of any property sold for taxes, unless the person or corporation desiring to commence or institute such action or proceeding shall first pay, or cause to be paid, or shall tender to the officer entitled under the law to receive the same, all taxes, penalties, interest and costs justly due and unpaid from such person or corporation on the property sought to be recovered.