Rule 4.Process
Part II: Commencement of Action; Service of Process, Pleadings, Motions and Orders · Last amended November 1, 2023 · Last verified July 13, 2026
Full Text of Rule 4
Amendment History
Amended effective March 1, 1988; April 1, 1990; April 1, 1996; November 1, 2001; November 1, 2002; April 1, 2004; April 1, 2006; April 1, 2012; May 1, 2014; November 1, 2016; May 8, 2018; May 1, 2021; November 1, 2022; November 1, 2023.
Plain-English Summary
Rule 4 is the mechanics manual for getting a defendant properly notified of a lawsuit. The summons must be signed and issued by the plaintiff or the plaintiff's attorney, and Rule 4(b) sets the outside clock: unless service is accepted, the summons and complaint must be served no later than 120 days after the complaint is filed, unless the court orders a different period under Rule 6. Miss that window, and the action against the unserved defendant can be dismissed without prejudice, either on a party's motion or on the court's own initiative.
Rule 4(c) spells out what a summons must say — the court's name and address, the parties' names, the county, the defendant's obligation to answer, the deadline for doing so, a warning that a default judgment can follow a failure to answer, whether the complaint is already on file or will be within ten days, and a bilingual notice in the court-approved form. If the case was commenced by service rather than filing, the summons must also tell the defendant that no answer is required if the complaint is not filed within ten days, and must give a phone number the defendant can call, no sooner than 14 days after service, to check whether the complaint has been filed.
Rule 4(d) lists the methods for delivering the summons and complaint. Personal service — by anyone 18 or older who is not a party or a party's attorney — has separate delivery rules depending on who is being served: individuals generally, minors under 14 (served through a parent or guardian), individuals judicially declared incapacitated, incarcerated individuals, corporations and similar entities, and various government bodies such as cities, counties, school districts, and the state itself through the attorney general. Service can also be made by mail or commercial courier if the recipient signs a document acknowledging receipt, or a party or their attorney can accept service instead by signing an acknowledgment — a path the rule encourages by imposing a duty on all parties to avoid the unnecessary expense of formal service, while also barring deceptive tactics in requesting acceptance. For defendants abroad, the rule looks first to internationally agreed methods such as the Hague Convention, then to other means reasonably calculated to give notice. And when a defendant's identity or location cannot be found despite reasonable diligence, or the defendant appears to be avoiding service, a party can ask the court by motion, supported by an affidavit or declaration describing the efforts made, to approve some other means of service.
Finally, Rule 4(e) requires the person who served the summons and complaint to file proof of service stating the date, place, and manner of service. Anyone other than an attorney, sheriff, marshal, or their deputies must submit that proof by affidavit or unsworn declaration. Failing to file proof of service does not undo the service itself — the court may allow the proof to be filed or amended later.
Frequently Asked Questions
How long do I have to serve a defendant after filing a complaint in Utah?
120 days from the date the complaint is filed, unless service is accepted or the court orders a different period under Rule 6. If service isn't timely made, the action against that defendant can be dismissed without prejudice.
Who is allowed to serve a summons and complaint?
Any person 18 or older who is not a party to the action and not a party's attorney, subject to the specific delivery requirements for the type of defendant being served.
How do I serve a corporation or LLC in Utah?
By delivering a copy of the summons and complaint to an officer, a managing or general agent, or another agent authorized by appointment or law to receive process, and also mailing a copy if a statute authorizing the agent requires that. If no such officer or agent can be found in the state, service can be made on the person in charge of the defendant's place of business.
Can a defendant just accept service instead of being formally served?
Yes, in most cases. A party (other than a minor under 14 or a judicially incapacitated individual) or their attorney can accept service by signing a document acknowledging receipt. Accepting service preserves all other defenses except a challenge to the adequacy of service itself.
What if I can't find or identify the person I need to serve?
Rule 4(d)(5) allows a party to move the court for permission to use another method of service, supported by an affidavit or declaration describing the efforts made to identify, locate, or serve the person, or explaining why serving all individual parties is impracticable.
How is a defendant served in a foreign country?
Primarily through any internationally agreed method reasonably calculated to give notice, such as those under the Hague Convention. If no such agreement applies or it permits other means, service can follow the foreign country's own law, a letter of request to a foreign authority, personal delivery, or signed-receipt mail, or another method the court directs.
What happens if proof of service is never filed?
The service itself remains valid — failing to file proof of service does not affect its validity. The court may allow the proof of service to be filed or amended after the fact.