The department may establish proof of service by any of the following:
(1) A declaration of personal service;
(2) An affidavit or certificate of mailing to the service provider or to the individual to whom the notice is directed;
(3) A signed receipt from the person who accepted the certified mail, the commercial delivery service, or the legal messenger service package; or
(4) Proof of fax transmission.
[Statutory Authority: RCW
71A.12.080. WSR 10-03-065, § 388-101-4360, filed 1/15/10, effective 2/15/10.]