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FL-510Mandatory

Summons (UIFSA)

California · Judicial Council of California · Effective July 1, 2017

This form tells a parent that a child support case has started in this state and warns that if the parent does not respond within 30 days, the court might decide they are the parent and order them to pay support.

The court describes it as: Tells one of the parents that a child support case from another state has started and what can happen if a response is not filed in 30 days.

Open the official PDFfrom Judicial Council of California

Where this fits in a case

Start a case

Stage: Start a case

This form is used when a child support case starts in a state that is different from where the parents live.

Either party may file.

Common questions

What does this form tell me?
It tells you that a lawsuit has started claiming you are a parent of children and that you must pay child support. It also warns you about what might happen if you do not respond.
How do I respond to this lawsuit?
You must take several steps within 30 calendar days of being served. These steps include filling out a response form, having someone else mail it, and filing it with the court.

Revision history

No changes recorded since we started tracking this form on October 9, 2026. The current version took effect July 1, 2017.

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