Service of process in Washington
In Washington, process may be served by the sheriff or sheriff's deputy, or by any person over 18 who is competent to be a witness and is not a party to the action, under Superior Court Civil Rule 4. No statewide process-server registration is required. The service rule sets no separate deadline to complete service after filing, but RCW 4.16.170 generally requires service within 90 days of filing the complaint to preserve the original filing date for statute-of-limitations purposes.
ProcessServerState provides procedural-information-only summaries of state process-server rules. This is not legal advice. Service of process is a critical step in litigation — if you fail to serve correctly, your case can be dismissed. For complex or contested matters, consult a licensed attorney or a court self-help center. Not affiliated with any court or sheriff's office.
Is a license required in Washington?
No statewide registration/licensing of private process servers. CR 4(c) permits service by the sheriff, a deputy, or any non-party over 18 competent to be a witness. Some local jurisdictions maintain their own registration ordinances.
Who may serve process in Washington?
- County sheriff
- Any non-party adult (18+)
- Licensed / registered process server
- Publication (by court order)
Service deadline (Washington)
No fixed 'days-to-serve-after-filing' deadline in the service rule. RCW 4.16.170 requires service (or commencement of service by publication) within 90 days of filing to preserve the filing date for statute-of-limitations tolling — a tolling consequence, not a service-completion deadline.
UIDDA: Washington has adopted the Uniform Interstate Depositions and Discovery Act for interstate service.
Sheriff / Marshal civil-process route
Civil-process fees are set by each county and listed on the local sheriff's civil-process page. Not all counties publish a fee schedule — confirm with the county where service will be made.
Statute / Rule citation
Wash. Super. Ct. Civ. R. 4 (CR 4); RCW 4.28.080 (manner of service)
UIDDA: RCW ch. 5.51 (short title RCW 5.51.900)
Interstate service from Washington
Washington has adopted the Uniform Interstate Depositions and Discovery Act (UIDDA), which provides a streamlined process for issuing an out-of-state subpoena based on one issued in the trial state. Service of an initial summons across state lines follows the receiving state's rules.
Sources for Washington
Other states with no license requirement
Check a different state
Verified against Washington primary sources on June 16, 2026. Read how we verify on our methodology page, or browse every citation in the source manifest.
Editorial review status: Reviewer attribution pending — we are recruiting a credentialed reviewer (ex-process-server with a NAPPS credential, or a NALA/NFPA-certified civil-procedure paralegal) before this site applies for advertising. We will not display a fabricated reviewer.
ProcessServerState provides procedural-information-only summaries of state process-server rules. This is not legal advice. Service of process is a critical step in litigation — if you fail to serve correctly, your case can be dismissed. For complex or contested matters, consult a licensed attorney or a court self-help center. Not affiliated with any court or sheriff's office.