The county auditor shall refuse to accept any plat for filing until approval of the plat has been given by the appropriate legislative body, or such other agency as authorized by RCW 58.17.100. Should a plat or dedication be filed without such approval, the prosecuting attorney of the county in which the plat is filed shall apply for a writ of mandate in the name of and on behalf of the legislative body required to approve same, directing the auditor and assessor to remove from their files or records the unapproved plat, or dedication of record.