Legal Question in Family Law in Washington

The easiest way with minimal hassle is to hire a professional process server here in Washington who has contacts. They'll take care of everything for you. Alternatively, google the local process servers in the town where you soon to be ex lives and scan and e-mail them the docs. Have them serve her and get you a "Return of Service" or an "Affidavit of Service" that you will need to file with the Court here to prove the service upon your wife in case you wind up needing to file for default if she does not respond to your petition for dissolution.