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How to Serve Child Custody Papers
Preparing for Court

How to Serve Child Custody Papers

Learn who can serve custody papers, which methods courts accept, and how to file proof of service on time so your case can move forward.

Best for the Children Editorial·8 min read·August 19, 2025·Updated October 18, 2026

You've just left the clerk's window with a stamped custody petition, and the hardest part seems finished. It isn't. Your case can't move forward until the other parent is formally served. To do that, an adult who is not you delivers the summons, the petition, and any other required forms within your state's deadline. That person then signs a proof of service, which you file with the court. Every step has rules, and a mistake can cost you weeks or get the case dismissed. Here's how to get it right.

The clock starts when you file

Service deadlines are set by each state's court rules. No single national standard applies. You may see "120 days" quoted online, but that number is outdated even in federal court. The federal rule dropped from 120 days to 90 days on December 1, 2015. Custody cases are heard in state courts anyway, and those courts follow their own rules.

Two examples show how much the rules differ:

  • Michigan: A summons expires 91 days after the complaint is filed. If service isn't finished by then, the case is dismissed without prejudice. That means you can refile, but you've lost time. The court can extend the deadline, up to one year, if you show you've been diligent in trying.
  • New York Family Court: Personal service of the summons and petition generally has to happen at least 8 days before the court appearance date.

Check your own court's deadline before you do anything else. Then work backward from it.

What goes in the packet

At minimum, the other parent gets copies of the summons and the petition. The summons tells them they're being sued and how long they have to respond. The petition tells them what you're asking for.

Custody cases often require more:

  • A jurisdictional declaration. Custody cases involving minor children require a declaration under the Uniform Child Custody Jurisdiction and Enforcement Act. In California this is Form FL-105, and it lists where the child has lived for the past five years. Check whether your state uses a similar form.
  • Automatic court orders. Some courts issue standing orders at the start of a family case. In Nevada's Eighth Judicial District Court (Clark County), cases involving children come with a Joint Preliminary Injunction. It bars both parents from taking the children out of Nevada and freezes property. It binds you as soon as you file. It binds the other parent only once they're served, which is one more reason not to delay.

Your court clerk or self-help center can tell you which forms belong in the packet.

Who is allowed to serve

The two basic rules are that the server must be at least 18 and not a party to the case.

That second rule means you cannot serve the papers yourself. You can't do it even if you hand them over politely, and you can't do it even if your ex is standing right in front of you. Courts require a third party.

The rules are looser than many people assume about who that third party can be. A friend or relative who is 18 or older and not involved in the case can legally serve. Many people hire a professional for the job, especially when the other parent is hard to find or the relationship is tense.

Some courts appoint a special process server. That person must still be a disinterested adult appointed by the court or the sheriff. A parent in the case can never be appointed to serve their own papers.

The main ways to serve

Personal delivery

Your server hands the papers directly to the other parent. This is the most reliable method and the hardest to challenge later.

Substituted service

Sometimes the other parent can't be caught at home or work despite real effort. California, for example, allows substituted service under Code of Civil Procedure § 415.20(b) after reasonable diligence. The server leaves the papers with a competent adult, 18 or older, at the parent's home or business. The server then mails a copy by first-class mail. Service counts as complete on the 10th day after mailing, so build that delay into your deadline.

Service by mail with acknowledgment

Mailing the papers works only in limited ways. In California family cases, service by mail counts only if the other parent signs and returns a Notice and Acknowledgment of Receipt (Form FL-117), and they must return it within 20 days. If they ignore it, you haven't served them. You'll need another method.

Email or other alternate service

Don't assume a text or email counts. In Michigan, for example, you can't make initial service by email without a court order. To get one, you file a motion showing your diligent attempts failed, using Michigan Form MC 303, the Motion and Verification for Alternate Service.

Service by publication

Sometimes you truly can't locate the other parent. Publication is the last resort for that situation. You ask the court for permission through an ex parte motion, backed by an affidavit describing your diligent search. If the court approves, a notice runs in a newspaper of general circulation. In Michigan, it runs once a week for three consecutive weeks. Expect the court to want proof that you actually searched, so keep a record of every attempt.

Prove it: file the proof of service

Once the papers are delivered, the server fills out and signs a proof of service. In California that's Form FL-115. It records the date, time, address, and exactly which documents were delivered. You file it with the court, and your case can't advance until it's filed. A server who can't remember those details is a problem, so have them write everything down at the time of service.

What happens after service

Service starts the other parent's clock to respond, and those deadlines also vary by state:

  • California: 30 calendar days from completed service to file a response, using Form FL-120 or FL-270.
  • Florida: 20 calendar days from service to file a written answer or counterpetition with the Clerk of Court.
  • Michigan: 21 calendar days if served in Michigan. The deadline becomes 28 days if served outside the state or by registered mail.
  • Texas: The answer is due by 10:00 a.m. on the Monday after 20 days have passed since service.

If you're the parent who was served, find your state's deadline right away and don't let it pass.

If the other parent doesn't respond

Missing the deadline can lead to a default. A default does not mean the judge automatically approves whatever you asked for. In California, the court must still decide custody based on the **best interest of the child** under Family Code § 3011, even in a default case.

There's also a federal protection to keep in mind. Under the Servicemembers Civil Relief Act, anyone seeking a default must file an affidavit stating whether the other party is in the military. If they are on active duty, the court must appoint a lawyer for them before entering a default.

Service is a procedural step, but it's the one that gives the court power to act. Get the right papers to the right person, through the right server, before the deadline, and file the proof.

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