All process issued by district court judges of the state and all executions and writs of attachment or of replevin shall be served by a sheriff or a deputy, but a summons or notice and complaint may be served by any citizen of the state of Washington over the age of eighteen years and not a party to the action.
RCW 12.04.050
Severability-1971 ex.s. c 292: See note following RCW 26.28.010.