Serving a Summons and Complaint: Methods, Deadlines, and Proof

Serving a summons and complaint in federal court means delivering those two documents to the defendant in a way Rule 4 of the Federal Rules of Civil Procedure authorizes, through a qualified server, within 90 days after the complaint is filed, and then filing proof of what you did with the court.¹ The method depends on who the defendant is: an individual, a business, the federal government, a defendant abroad, a minor, or someone who cannot be located. Each category has its own rules, and the lawsuit does not formally begin until service is complete.

What the Summons Must Contain

Before anyone can be served, the court clerk issues the summons. It must name the court and the parties, give the name and address of your attorney (or your own contact information if you are self-represented), and state the deadline by which the defendant must respond.¹ The standard federal form is AO 440, available from any federal court clerk or the U.S. Courts website.² Court name, case number, and party names must match the complaint exactly. The summons always travels with the complaint; neither document goes alone.

Verify the defendant’s current address before you attempt delivery. An accurate address is the difference between a smooth process and weeks of delay.

Who Can Serve the Documents

The server must be at least 18 years old and cannot be a party to the lawsuit.¹ You cannot serve your own case. A friend, relative, or coworker who meets the age requirement and has no stake in the outcome can do it, but most plaintiffs hire a professional process server.

If you qualify to proceed without paying court fees under 28 U.S.C. § 1915, or as a seaman under 28 U.S.C. § 1916, the court must order a U.S. Marshal or deputy marshal to handle service for you.¹ Even without that status, a court can order marshal service on request when circumstances warrant it.

Serving an Individual Defendant

Rule 4(e) governs service on individuals within a federal judicial district. The cleanest option is personal service: someone physically hands the summons and complaint to the defendant. This eliminates any argument that the defendant did not know about the lawsuit.¹

When the defendant cannot be reached in person, substituted service is the next option. You can leave copies of both documents at the defendant’s dwelling with someone of suitable age and discretion who lives there.¹ The federal rules do not set a specific age cutoff, but courts expect someone mature enough to understand that the papers are important and must reach the defendant. A young child does not qualify.

Rule 4(e)(1) also permits following the service rules of the state where the federal court sits or where service is being made. State rules sometimes authorize methods the federal rules do not mention directly, such as service by posting or service through the state’s Secretary of State for certain defendants. Checking both federal and state requirements before serving gives you the widest set of options.

Requesting a Waiver of Service

Formal service costs money and takes time. Rule 4(d) offers a shortcut: mail the defendant a written request asking them to voluntarily waive formal service. Send it by first-class mail or another reliable means, and include a copy of the complaint, two copies of the waiver form, and a prepaid return envelope. The request must name the court, state the date it was sent, and explain the consequences of accepting or refusing. The defendant gets at least 30 days to return the signed waiver, or at least 60 days if the defendant is outside the United States.¹

The incentive structure makes waivers work. A defendant within the United States who refuses without good cause must pay the costs of formal service plus attorney’s fees for any motion needed to collect those costs. The rules specifically state that believing the lawsuit is baseless, filed in the wrong court, or outside the court’s jurisdiction does not count as good cause.¹ In return for cooperating, a defendant who returns the waiver gets 60 days from the date the request was sent to file a response, rather than the usual 21 days.³ Waiving service does not waive any objections to jurisdiction or venue.

Serving Corporations and Business Entities

Suing a company changes the target. Rule 4(h) requires delivering the summons and complaint to an officer, a managing or general agent, or any other agent authorized to accept legal documents on the entity’s behalf.¹ You can also follow state-law service methods available under Rule 4(e)(1).

Nearly every state requires businesses to designate a registered agent (sometimes called a statutory agent) specifically to receive lawsuits. The agent may be an officer of the company, an attorney, or a commercial registered-agent service. Most states let you search for that information through the Secretary of State’s office, often for free or for a small fee. Identifying the correct agent before attempting service avoids wasted trips and challenges to whether service was proper.

Serving the U.S. Government

Lawsuits against the federal government have layered service requirements, and missing a step means starting over. To serve the United States itself, you must deliver the summons and complaint to the U.S. Attorney for the district where the action is filed (or send copies by registered or certified mail to the civil-process clerk at that office), and also send copies by registered or certified mail to the Attorney General in Washington, D.C. If the case challenges an order from a federal agency or officer, you must additionally mail copies to that agency or officer.¹

When you are suing a federal agency, a government corporation, or an officer in their official capacity, serve the United States using the steps above and also mail copies to the specific agency, corporation, or officer. Suing a federal employee individually for something they did on the job requires serving the United States and personally serving the employee under the normal individual-service rules.¹ One cushion: if you manage to serve at least the U.S. Attorney or the Attorney General, the court must give you a reasonable chance to fix any remaining gaps rather than dismissing outright.

Serving Defendants Abroad

International service adds complexity because foreign law and treaties come into play. Rule 4(f) requires that you first use any internationally agreed-upon method, most commonly the Hague Convention on the Service Abroad of Judicial and Extrajudicial Documents.¹ Under the Hague Convention, each member country designates a Central Authority that receives service requests from other countries and arranges for delivery under its own domestic procedures.⁴

If no international agreement applies, or if one exists but does not limit your options, Rule 4(f)(2) allows alternatives: following the foreign country’s own service procedures, using a letter rogatory (a formal request from the U.S. court to a foreign court), delivering documents personally to the defendant abroad, or sending them by a form of mail requiring a signed receipt. As a backstop, a court can order any other method not prohibited by an international agreement.¹ International service routinely takes months. Factor that into the 90-day deadline, though courts are generally more willing to extend when foreign service is involved.

Minors, Incompetent Persons, and Missing Defendants

You cannot serve a minor or a legally incompetent person the way you serve any other individual. Within the United States, Rule 4(g) requires you to follow the service rules of the state where you are making the delivery. Most states require serving a parent, legal guardian, or court-appointed representative rather than, or in addition to, the person directly.¹ Check the specific state rules first.

When you have exhausted reasonable efforts to find the defendant and still cannot, some courts allow service by publication, meaning a legal notice placed in a newspaper or other approved publication. The federal rules do not directly authorize publication, but Rule 4(e)(1) lets you use state-law methods, and many states permit publication as a last resort.¹ You will almost always need a court order first, and you will have to show the court exactly what steps you took to find the defendant. Publication is most common in cases involving real property or when the court needs to assert jurisdiction over assets within the district.

The 90-Day Deadline and Proof of Service

After delivery, the person who made it must file proof with the court. If anyone other than a U.S. Marshal performed the service, they must submit a sworn affidavit or declaration describing the date, time, location, and method of delivery. Most courts accept electronic filings; some still require paper copies. Failing to file proof of service does not invalidate the service itself, and the court can allow the proof to be amended or filed late.¹

The deadline that matters is the 90-day service window. If the defendant has not been served within 90 days after the complaint is filed, the court must either dismiss the case without prejudice or order service to be completed within a specified period. Dismissal without prejudice means you can refile, but it costs time and money. If you can show good cause for the delay, the court must grant an extension.¹ An elusive defendant, international service logistics, or a process server who dropped the ball can all support a good-cause argument, though courts vary in how generously they interpret the standard.

What Happens After Service

Once properly served, the defendant has 21 days to file a response in federal court. If the defendant waived formal service, that window extends to 60 days from the date the waiver request was sent.³ The response is typically an answer addressing each allegation, though the defendant may instead file a motion to dismiss based on jurisdictional problems, improper venue, or insufficient service.

If the defendant does nothing, you can ask the court clerk to enter a default. After default is entered, you can seek a default judgment. When the claim is for a specific dollar amount, the clerk can enter judgment directly. For all other claims, a judge must hold a hearing to determine what relief is appropriate.⁵ Default judgment is not automatic, and courts sometimes require proof of damages even when the defendant has not appeared.

Defendants who believe service was defective can raise the issue early under Rule 12(b)(4) (flaw in the summons) or Rule 12(b)(5) (defective method of delivery).³ Common grounds include serving the wrong person at a business, leaving papers with someone who does not actually live at the defendant’s home, or failing to follow mandatory state-law procedures when relying on Rule 4(e)(1). If a court finds service improper, it usually gives the plaintiff another chance rather than dismissing the case, but the second attempt still has to happen within the 90-day window or its court-ordered extension. Keep detailed records of every attempt, use a professional process server when the stakes justify it, and file proof of service promptly.

1
Legal Information Institute. Federal Rules of Civil Procedure Rule 4
2
United States Courts. Summons in a Civil Action
3
Legal Information Institute. Federal Rules of Civil Procedure Rule 12 – Defenses and Objections When and How Presented
4
Hague Conference on Private International Law. Convention on the Service Abroad of Judicial and Extrajudicial Documents in Civil or Commercial Matters
5
Legal Information Institute. Federal Rules of Civil Procedure Rule 55 – Default and Default Judgment