Federal Rule of Civil Procedure 4: Summons, Service, and Waiver

Federal Rule of Civil Procedure 4 sets out how a plaintiff must give a defendant formal notice that a federal lawsuit has been filed. In practical terms, it requires the plaintiff to have the court clerk issue a summons, then deliver that summons together with the complaint to each defendant within 90 days, using a method the rule allows for that type of defendant. Get it wrong and the court has no personal jurisdiction, which means the case cannot move forward and can be dismissed.

The 90-Day Deadline

The plaintiff has 90 days after filing the complaint to serve every defendant. Miss that window and the court can dismiss the case without prejudice or order service completed by a new date. Either can happen on the court’s own initiative or on a defendant’s motion, but the plaintiff must get notice first.¹

Good cause for the delay forces the court to extend the deadline. Even without good cause, many courts extend rather than dismiss, particularly where the statute of limitations has run and dismissal would end the case in substance.² The 90-day clock does not apply to service made in a foreign country under Rule 4’s international provisions, which routinely take months.

Who Can Serve the Papers

Any person who is at least 18 and not a party to the lawsuit can serve the summons and complaint. Most plaintiffs hire a private process server, but the rule does not require it. A friend or colleague who meets the age requirement is legally sufficient.¹

U.S. marshals or deputy marshals handle service only in limited situations. The court must order marshal service when the plaintiff proceeds in forma pauperis or as a seaman, and it may order marshal service or appoint another person at its discretion in other cases.

What the Summons Must Contain

The plaintiff presents a summons to the clerk after filing the complaint. The clerk signs it, stamps it with the court’s seal, and issues it back. Each defendant gets a separate copy of the summons along with the complaint.

To be valid, the summons must name the court and the parties, be directed to the defendant being served, state the name and address of the plaintiff’s attorney (or the plaintiff if self-represented), state the time within which the defendant must appear and respond, warn that failure to do so results in a default judgment for the relief demanded, and carry the clerk’s signature and the court’s seal.¹ The court has discretion to allow amendments if something needs to be corrected after issuance.

Serving an Individual in the United States

For an individual served within a U.S. judicial district, Rule 4 allows four approaches, and the plaintiff picks whichever fits.

Hand the summons and complaint directly to the defendant. This is the hardest method to challenge later.
Leave the documents at the defendant’s home with someone of suitable age and discretion who lives there. A young child or a visiting guest does not qualify.
Deliver to an agent the defendant has formally authorized to accept service, or an agent the law designates for that purpose.
Follow the service rules of the state where the federal court sits or the state where service is actually being made.

That last option is where methods like service by mail or service by publication come in. They are not written into Rule 4 directly, but they become available when a state’s own rules allow them.¹

Serving a Corporation, Partnership, or Association

Within a U.S. judicial district, the plaintiff can deliver the summons and complaint to an officer of the entity, a managing or general agent, or any other agent authorized by appointment or by law to accept service. If a statute requires it, the plaintiff must also mail a copy to the defendant organization after delivering to the agent. State-law service methods are equally available, and serving a registered agent listed in the state’s business database is often the simplest route.¹

Serving Governments

For a state, city, county, or other governmental body created under state law, the plaintiff either delivers the summons and complaint to the entity’s chief executive officer or follows the service method that state’s own law prescribes for lawsuits against its governmental bodies.² Foreign states and their political subdivisions are served under the Foreign Sovereign Immunities Act at 28 U.S.C. §1608.

Suing the United States itself requires more steps. The plaintiff must deliver a copy of the summons and complaint to the U.S. Attorney for the district where the case was filed (or to a designated assistant or clerk in that office), or send it by registered or certified mail to the civil-process clerk there. A copy must also go by registered or certified mail to the Attorney General in Washington, D.C. If the lawsuit challenges an order from a federal agency or officer who is not named as a party, a copy must be mailed to that agency or officer as well.¹

When the defendant is a federal agency, corporation, or officer sued in an official capacity, the plaintiff serves the United States through the steps above and separately mails a copy of the summons and complaint to the agency or officer by registered or certified mail. If the U.S. Attorney or the Attorney General was served but a specific agency or officer was missed, the court must give the plaintiff a reasonable time to fix the mistake rather than dismiss.¹

Serving a Defendant in a Foreign Country

Rule 4 sets a hierarchy of methods for international service. The preferred route is any internationally agreed means reasonably calculated to give notice, such as those authorized by the Hague Convention on the Service Abroad of Judicial and Extrajudicial Documents. Most signatory countries designate a Central Authority that receives service requests from foreign courts.

If no international agreement applies, or if an agreement allows other methods, the plaintiff can serve using the foreign country’s own law for domestic lawsuits, follow directions from the foreign authority in response to a letter rogatory or letter of request, or, unless the foreign country’s law prohibits it, personally deliver the documents or use a form of mail sent by the clerk that requires a signed receipt. A letter rogatory is a formal request from the court where the case is pending to a foreign court, asking it to perform a judicial act such as serving legal documents.³

As a catch-all, the court can order service by any other means not prohibited by an international agreement. Courts have used this provision to authorize service by email or social media when standard channels have failed.¹ Corporations and associations abroad follow the same methods as individuals abroad, except personal hand-delivery is not permitted.

Minors and Incompetent Persons

The standard methods for serving individuals do not reach minors or people who have been declared legally incompetent. Service must instead follow the law of the state where service is being made, which typically directs the papers to a parent, legal guardian, or court-appointed representative.¹ If the minor or incompetent person is outside the United States, the plaintiff uses the international service methods above, excluding personally agreed-upon means.

Waiving Formal Service

The plaintiff can ask the defendant to waive formal service. The request goes out by first-class mail or another reliable means, along with a copy of the complaint, two copies of the waiver form, and a prepaid way to return the form. The defendant must be given at least 30 days to return the signed waiver, or at least 60 days if abroad.¹

The incentive to sign is real. A defendant who returns the waiver has 60 days from the date the request was sent to file an answer, rather than 21 days after formal service. Defendants outside the country get 90 days. Waiving service does not waive any objections to the lawsuit, including objections to jurisdiction or venue.

A defendant located in the United States who refuses to waive without good cause faces mandatory cost-shifting. The court must order that defendant to pay the expenses the plaintiff later incurred to arrange formal service, plus the reasonable costs of any motion needed to recover those expenses, including attorney’s fees for that motion.¹ The word “must” leaves no discretion.

Personal Jurisdiction Limits Under Rule 4(k)

Proper service is necessary but not sufficient. Rule 4(k) defines when service actually establishes personal jurisdiction. Three situations qualify: the defendant would be subject to jurisdiction in the courts of the state where the federal district court sits (this is the usual basis and picks up each state’s long-arm statute); the defendant is a party joined under Rule 14 or Rule 19, is served within a U.S. judicial district, and is located within 100 miles of where the summons was issued; or a federal statute specifically authorizes nationwide or broader service.²

There is also a federal-claim fallback. If a claim arises under federal law and the defendant is not subject to jurisdiction in any single state’s courts, serving the summons establishes jurisdiction so long as it is consistent with the Constitution.

Filing Proof of Service

Once service is complete, the server files proof with the court. Unless a U.S. marshal or deputy marshal handled the delivery, proof takes the form of the server’s affidavit describing when and how service was made.¹ International service under the Hague Convention or another treaty uses whatever proof the treaty prescribes; other international service is proved by a signed receipt from the recipient or other evidence satisfying the court that the documents were delivered. No proof is required when the defendant has returned a waiver.

Failing to file proof does not invalidate the service itself, and the court can allow the proof to be amended. Skipping it is still a risk. Without documentation in the record, the defendant can challenge whether service ever happened, and the plaintiff carries the burden of proving it did.

1
Cornell Law School. Federal Rules of Civil Procedure Rule 4 – Summons
2
United States Courts. Federal Rules of Civil Procedure
3
eCFR. 22 CFR 92.54 – Letters Rogatory Defined