Wash. Rev. Code § 78.08.081
Within thirty days after the expiration of the period of time fixed for the performance of annual labor or the making of improvements upon any quartz or lode mining claim or premises, the person in whose behalf such work or improvement was made or some person for him or her knowing the facts, shall make and record in the office of the county auditor of the county wherein such claims are situate either an affidavit or oath of labor performed on such claim, or affidavit or oath of fee or fees paid to the federal government in lieu of the annual labor requirement. Such affidavit shall state the exact amount of fee or fees paid, or the kind of labor, including the number of feet of shaft, tunnel or open cut made on such claim, or any other kind of improvements allowed by law made thereon. When both fee and labor requirements have been waived by the federal government, such affidavit will contain a statement to that effect and the state shall not require labor to be performed. Such affidavit shall contain the section, township and range in which such lode is located if the location be in a surveyed area.
RCW 78.08.081