RCW 64.35.520: Notice of claim—Reasonable timeliness and detail—Contents.

(1) Within a reasonable time after the discovery of a defect and before the expiration of the applicable qualified warranty coverage, a claimant must give to the qualified insurer and the declarant written notice in reasonable detail that provides particulars of any specific defects covered by the qualified warranty.

(2) The qualified insurer may require the notice under subsection (1) of this section to include:

(a) The qualified warranty number; and

(b) Copies of any relevant documentation and correspondence between the claimant and the declarant, to the extent any such documentation and correspondence is in the control or possession of the claimant.