RCW 46.12.101 (6)
If the purchaser or transferee fails or neglects to make application to transfer the certificate of ownership and license registration within fifteen days after the date of delivery of the vehicle, he or she shall on making application for transfer be assessed a twenty-five dollar penalty on the sixteenth day and two dollars additional for each day thereafter, but not to exceed one hundred dollars. The director may by rule establish conditions under which the penalty will not be assessed when an application for transfer is delayed for reasons beyond the control of the purchaser. Conditions for not assessing the penalty may be established for but not limited to delays caused by:
(a) The department requesting additional supporting documents;
(b) Extended hospitalization or illness of the purchaser;
(c) Failure of a legal owner to release his or her interest;
(d) Failure, negligence, or nonperformance of the department, auditor, or subagent;
(e) The transferee had no knowledge of the filing of the vehicle report of sale and signs an affidavit to the fact.