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What Can an Unmarried Father in California Do If the Mother Moves the Kids Out of State?

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JV

Reviewed & verified by A. Jason Velez, Esq.*

Managing Attorney, 1LAW · Last reviewed January 1, 2026

Legal Inquiry

Consumer Legal Issue

My girlfriend, who has sole custody of our children, moved across the country without my knowledge. We always lived together as a family, and now she refuses to let me speak to her or the kids. I try to contact them every day, but she won't respond. No legal actions have been taken so far. What steps can I take to resolve this situation?

Attorney Answer

With no court order in place, there is currently no enforceable custody or visitation schedule between you and your children's mother. That is the real problem, and it is fixable, but the clock is running, so filing for custody quickly matters more than anything else.

Being on the children's birth certificates is a strong start. In California, an unmarried father's name generally goes on the birth certificate only after both parents sign a Voluntary Declaration of Parentage, and a properly completed declaration generally establishes you as a legal parent (Family Code section 7570 and following). Once parentage is established, California law makes both legal parents equally entitled to seek custody, and state policy favors frequent and continuing contact with both parents (Family Code sections 3010 and 3020).

The catch is that rights on paper are not the same as an enforceable order. Until a court issues a custody and visitation order, there is nothing for police or courts to enforce, and neither parent violates an order by making one-sided decisions, including moving away. That is why her move, as painful as it is, was likely not illegal by itself. Getting your own case on file is how you change that.

Time matters here more than almost anything else. California and every other state follow the Uniform Child Custody Jurisdiction and Enforcement Act (Family Code section 3400 and following), which generally gives custody jurisdiction to the child's "home state," meaning the state the child has lived in for the six months right before a case is filed. If your children have already moved and enough time passes, the new state could become their home state instead of California, affecting where you would need to file and how quickly a court there might act. Filing as soon as possible protects your ability to have this handled somewhere you can more easily reach.

What you can do right away:

1. Confirm your legal parentage is on record, not just the birth certificate, if that has not already been done. 2. File a Petition to Establish Parental Relationship and a Request for Order for custody and visitation in California family court as soon as possible, ideally this week. 3. Document every attempt to contact your children and her, including dates, texts, and calls. This record matters later. 4. Do not travel to retrieve the children or take any self-help action, since that can seriously hurt your case even when your intentions are good. 5. Consult a family law attorney immediately given how time-sensitive the jurisdiction question is.

This is general legal information, not legal advice. A California family law attorney can move quickly to file the right paperwork and address the interstate jurisdiction issue before more time passes.

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Courts & Legal Aid in California

Frequently Asked Questions

Does being on the birth certificate automatically make me the legal father in California?

It strongly supports it, but a signed Voluntary Declaration of Parentage, previously called a Declaration of Paternity, or a court judgment gives you the clearest legal proof. If you are unsure which applies to you, a family law attorney or the local child support agency can check the record.

Can she legally move the children out of state if there is no custody order?

With no court order in place, there is generally no order for her to violate, so the move by itself was likely not illegal. A California court can still address the move and set a custody schedule once a case is filed, which is why acting quickly matters so much.

What happens if I wait too long to file for custody?

The longer the children live in the new state, the more likely that state becomes their legal home state for custody purposes, which can shift where your case needs to be filed and heard. Acting quickly helps preserve your options.

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