To serve custody papers in California, you arrange for another adult, not yourself, to deliver the complete filed packet to the other parent using one of three legal methods, and then file a Proof of Service with the court. The rules about who can serve, what must be in the packet, and how delivery is documented are strict, and skipping any of them can stall your case or get an order thrown out later.
Who Is Allowed to Deliver the Papers
The person who serves your papers must be at least 18 and cannot be a party to the case.1California Legislative Information. California Code CCP 414.10 – Persons Who May Serve Summons You cannot hand the documents to the other parent yourself, even if things between you are friendly. Courts enforce this because a neutral delivery protects everyone from later arguments about whether service actually happened.
You have three practical choices. A friend or relative who is not involved in the dispute can do it for free. A professional process server typically charges between $75 and $150 depending on complexity and location. The county sheriff will also serve papers; the fee for a summons and petition runs around $50 in many California counties, though it varies. A professional server or sheriff deputy knows how to document each attempt and sign a sworn declaration, which carries weight if the other parent later claims they were never served.
What Goes in the Service Packet
Your server has to deliver a full packet, not a few loose forms. For a custody and support case, that packet includes:
- Summons, Form FL-210, the official notice that a case has been filed and a response is required.
- Petition for Custody and Support of Minor Children, Form FL-260, your filed petition stating what you are asking the court to order.2California Courts. Petition for Custody and Support of Minor Children (FL-260)
- A blank Response, Form FL-270, so the other parent has the form they need to answer.
- Declaration Under the UCCJEA, Form FL-105, covering where your children have lived for the past five years, any other custody cases, and any domestic violence protective orders.3Judicial Council of California. FL-105 Declaration Under Uniform Child Custody Jurisdiction and Enforcement Act
The UCCJEA declaration trips people up because it needs more detail than the rest. You have to list each child’s full name, date of birth, and birthplace, plus every address the child has lived at for the last five years and who they lived with at each one. If any other court anywhere in the country has handled custody or visitation for your children, you have to disclose it. You also have an ongoing duty to update the form if you learn about another custody proceeding while your case is pending.3Judicial Council of California. FL-105 Declaration Under Uniform Child Custody Jurisdiction and Enforcement Act
Every form is free on the California Courts website. Include copies of everything you filed, plus the blank response. One missing document gives the other parent grounds to challenge service later.
The Three Ways to Serve Custody Papers
California recognizes three standard methods. Each has its own rules about when service becomes complete, and that affects how soon the other parent’s response clock starts.
Personal Service
Personal service is the simplest method and the one courts prefer. Your server physically hands the full packet to the other parent, wherever the server finds them: at home, at work, or somewhere in between. Service is complete the moment the papers are delivered.4California Legislative Information. California Code CCP 415.20 The other parent does not have to take the papers willingly. If they refuse, the server can identify them, set the documents down at their feet, and that counts.
Substituted Service
If your server cannot reach the other parent personally, California allows substituted service. The law defines what counts as reasonable diligence: your server must try personal delivery in good faith on at least three occasions, on three different days, at three different times.4California Legislative Information. California Code CCP 415.20 Varying days and times matters, because the court wants to see real effort, not three Monday-noon visits in a row.
Once those attempts fail, the server can leave the packet with a competent adult (18 or older) at the other parent’s home, usual workplace, or usual mailing address, and must tell that person generally what the documents are about. The server then has to mail a copy of the whole packet to the other parent at that same address by first-class mail, Priority Mail with tracking, or Certified Mail with return receipt.4California Legislative Information. California Code CCP 415.20 Service is complete ten days after that mailing, not on the day the papers were handed to the other adult. Have your server log every failed personal attempt with dates, times, and addresses, because a judge will check whether the three-attempt rule was actually met.
Service by Mail With Acknowledgment
If the other parent is cooperative, your server can mail the packet along with two copies of a Notice and Acknowledgment of Receipt, Form FL-117, and a prepaid return envelope.5California Legislative Information. California Code CCP 415.30 The other parent signs one copy and sends it back.
Service is complete on the date the other parent signs the acknowledgment, not the day they drop it in the mail. If they ignore the mailing or do not return a signed form within 20 days, this method fails and you have to switch to personal or substituted service. One useful detail: a person who fails to return the acknowledgment can be held liable for the cost of serving them by another method.5California Legislative Information. California Code CCP 415.30 Sometimes that alone persuades a reluctant recipient to sign.
When You Cannot Find the Other Parent
If the other parent has moved without a forwarding address or is actively avoiding you, California allows service by publication, but only as a last resort. You have to convince a judge first that you tried everything else with reasonable diligence and still could not get the papers delivered.6California Courts. Ask to Serve by Publication or Posting
You file a motion asking for permission, along with a sworn statement laying out every step you took to find the other parent: addresses you tried, people you contacted, databases you searched, and why each effort failed. Judges look closely at this. If the court thinks you gave up too soon, the motion gets denied. Hiring a process server who offers skip-tracing to search public records and property databases both improves your chances of finding the other parent and strengthens the sworn statement by showing you went beyond casual effort.
If the court grants the motion, it orders you to publish a summary of the summons in a specific newspaper chosen because it is most likely to reach the other parent. The notice has to run once a week for four consecutive weeks.6California Courts. Ask to Serve by Publication or Posting If you learn the other parent’s address before publication ends, you also have to mail them a copy of the summons, petition, and the publication order. Publication is slow and newspapers charge for legal notices, but sometimes it is the only path.
Filing the Proof of Service
After delivery, your server fills out and signs a Proof of Service of Summons, Form FL-115.7California Courts. Proof of Service of Summons (Family Law – Uniform Parentage – Custody and Support) (FL-115) It is a sworn form showing who was served, when and where it happened, which method was used, and who did the serving. The server completes it, not you.
File the completed FL-115 at the court where you filed your petition, either in person at the clerk’s window or by mail. The court will not schedule hearings or make any orders on your case until this form is on file. Delay here is one of the most common reasons custody cases stall. Keep a copy for yourself.
You technically have up to three years from the date you filed your case to complete service.8Justia. California Code CCP 583.210-583.250 Do not use that window. The longer you wait, the harder the other parent is to locate, and a judge may question how serious you are about the case. Aim to finish service within a few weeks of filing.
What Happens After Service
Once the other parent is properly served, their response clock starts. The Summons tells them they have 30 days to file a response with the court. If you used substituted service, those 30 days run from the day service was deemed complete, which is ten days after the mailing, not the day the papers were left with another adult.
If They Do Not Respond
If no response is filed within the deadline, you can ask the court to enter a default. A default means the other parent has given up the right to participate, and the court can make custody and support orders based on what you asked for in your petition.9California Courts. How to Get a Default With Agreement in Child Custody and Support If you and the other parent reached a written, notarized agreement even though they never formally responded, the court can enter orders based on that agreement.
Before entering any default, federal law requires you to file a sworn statement about whether the other parent is on active military duty.10Office of the Law Revision Counsel. 50 USC 3931 – Default Judgments The Servicemembers Civil Relief Act protects active-duty members from having orders entered against them while they are unable to appear. Your statement must either confirm the other parent is not in the military or state that you could not determine their status. The Department of Defense’s SCRA website lets you verify active-duty status. If the other parent is on active duty, the court may have to delay proceedings for at least 90 days.
If They Do Respond
If the other parent files a response on time, the case moves forward. The court will usually schedule a mediation session through Family Court Services, because California requires mediation before a judge hears a contested custody dispute. From that point both parents can ask for temporary custody orders, submit evidence, and participate in the case. Proper service is what unlocks all of it, which is why courts are so particular about how it is done.