Birth Certificate Names for Unmarried Parents

When parents are not married, the father's name is not always on the child's birth certificate. Sometimes the parents simply did not complete the paperwork at the hospital. Sometimes they disagree about parentage. Either way, the question often comes up later, when a parent wants to be listed, needs the record for school or benefits, or is dealing with custody or child support. This guide explains the common paths in general terms. The exact steps are set by each state.

Who keeps birth records

Birth certificates are kept by the vital records office of the state or territory where the child was born. USAGov's birth certificate page explains that you contact the birth state's vital records office to learn how to order certified copies, how to get a copy fast, and what each copy costs. You need to know the city and county of birth.

That same office, or the state's child support agency, is usually where you learn how a parent's name can be added or corrected. Rules and forms differ by state, so check with the state where your child was born, not the state where you live now, if they differ.

Why it matters: parentage is more than a name

A name on a birth certificate is a record. Legal parentage is a legal status. The two are related, but they are not always the same thing, and the details depend on state law.

The federal Office of Child Support Enforcement explains on its How It Works page that once parentage is legally established, a child gains legal rights that could include:

• inheritance rights;
• Social Security benefits;
• veterans' benefits;
• life insurance benefits; and
• access to the birth father's medical history.

OCSE also notes that establishing parentage can provide important emotional and social ties between a parent and child. And it is often a necessary step before a court or agency can set child support, custody, or parenting time.

Option 1: Voluntary acknowledgment of paternity

For many unmarried parents, the simplest path is a voluntary acknowledgment. OCSE says states offer men the opportunity to voluntarily acknowledge that they are the birth father, and that forms are available at the hospital or from the state vital records agency. More information is available from the child support agency.

In general terms, both parents sign a form, and the state records it. Many hospitals offer the form shortly after birth, but parents can often complete it later as well. Because an acknowledgment can carry legal weight, read it carefully before signing. If you are not sure who the father is, do not sign until you have answers.

Option 2: Genetic testing through the child support agency

If parentage is uncertain, OCSE explains that a DNA test can be requested by the alleged father, the mother, or the child support agency. If the state or tribe orders the tests, it may charge the parties for the cost. If either parent disputes the original result, they can request and pay for a second test through the state or tribe.

Child support offices can help establish parentage as part of their services. You can find your office through the OCSE state and tribal agency contacts map.

Option 3: A court case

When parents disagree, a court can decide parentage. OCSE notes that if an alleged father fails to respond to a formal, properly served notice, a default judgment establishing paternity may be entered, and a support order may follow. What counts as proper service is set by the state or tribe.

A court case may also be needed when:

• another man is already listed or presumed to be the father;
• one parent wants to undo an earlier acknowledgment;
• custody, parenting time, and support need to be decided together; or
• one parent cannot be found.

OCSE says that if paternity was established by fraud, duress, or a material mistake of fact, it may be possible, depending on state or tribal law, to challenge it. These cases are fact-heavy, and time limits may apply.

Changing the birth certificate after parentage is set

After parentage is established by acknowledgment or court order, the vital records office usually has a process for updating the birth record. Some states may also allow a change to the child's last name as part of that process; others require a separate request or court order. Ask your state's vital records office what documents it needs, and keep certified copies of any court order.

Safety concerns

If naming the other parent could put you or your child at risk, raise this before you start. OCSE says parents can talk with their caseworker, and that safeguards such as a family violence indicator can help protect personal information in child support records.

When to talk to a family lawyer

Many parents complete an acknowledgment without a lawyer. Legal advice is worth considering when parentage is disputed, when someone wants to undo an earlier acknowledgment or court finding, when another person is a presumed parent, or when custody and support are also at issue. A lawyer can explain how your state treats acknowledgments, how long you have to challenge one, and how parentage affects your other rights. Our family law practice page has more on this area.

If cost is a concern, USAGov's legal aid page lists free and low-cost legal help.

Frequently asked questions

Can we add the father's name after we leave the hospital?

In many states, yes. OCSE says acknowledgment forms are available from the state vital records agency as well as at the hospital. Check with the vital records office in the child's birth state.

Does signing an acknowledgment affect child support?

It can. Legal parentage is often the basis for a support order. Ask the child support agency or a lawyer before signing if you have questions.

What if we are not sure who the father is?

Do not sign an acknowledgment until you know. OCSE explains that DNA testing can be requested through the child support agency.

Which state's rules apply?

Generally, the birth record is kept by the state where the child was born. Parentage cases may involve other states too, so ask a lawyer if you have moved.

Related: Browse guides on legal topics.

This page is general information, not legal advice. Laws change and every case is different — talk to a licensed attorney about your situation.