(1) The administrator shall pay or deliver property to a claimant under RCW 63.30.530(1) if the administrator receives evidence sufficient to establish to the satisfaction of the administrator that the claimant is the owner of the property.

(2) Not later than 90 days after a claim is filed under RCW 63.30.530(1), the administrator shall allow or deny the claim and give the claimant notice in a record of the decision.

(3) If the claim is denied under subsection (2) of this section:

(a) The administrator shall inform the claimant of the reason for the denial and specify what additional evidence, if any, is required for the claim to be allowed;

(b) The claimant may file an amended claim with the administrator or commence an action under RCW 63.30.560; and

(c) The administrator shall consider an amended claim filed under (b) of this subsection as an initial claim.

(4) If the administrator does not take action on a claim during the 90-day period following the filing of a claim under RCW 63.30.530(1), the claim is deemed denied.