Wash. Rev. Code § 59.12.100
The sheriff shall, upon receiving the writ of restitution, forthwith serve a copy thereof upon the defendant, his or her agent or attorney, or a person in possession of the premises, and shall not execute the same for three days thereafter, nor until after the defendant has been served with summons in the action as hereinabove provided, and the defendant, or person in possession of the premises within three days after the service of the writ of restitution may execute to the plaintiff a bond to be filed with and approved by the clerk of the court in such sum as may be fixed by the judge, with sufficient surety to be approved by the clerk of said court, conditioned that he or she will pay to the plaintiff such sum as the plaintiff may recover for the use and occupation of the said premises, or any rent found due, together with all damages the plaintiff may sustain by reason of the defendant occupying or keeping possession of said premises, and also all the costs of the action. The plaintiff, his or her agent or attorneys, shall have notice of the time and place where the court or judge thereof shall fix the amount of the defendant's bond, and shall have notice and a reasonable opportunity to examine into the qualification and sufficiency of the sureties upon said bond before said bond shall be approved by the clerk. The writ may be served by the sheriff, in the event he or she shall be unable to find the defendant, an agent or attorney, or a person in possession of the premises, by affixing a copy of said writ in a conspicuous place upon the premises.
RCW 59.12.100