Wash. Rev. Code § 84.56.025
(2) In addition to the waiver under subsection (1) of this section, the interest and penalties for delinquencies on property taxes must be waived by the county treasurer under the following circumstances:
[ 2014 c 13 s 2; 2003 c 12 s 1; 1998 c 327 s 1; 1984 c 185 s 1.]