C100 Application Form — UK Family Court Guide

What is this?

The C100 form is the court application you use to ask a family judge to make decisions about where a child should live, who they should spend time with, and any other arrangements concerning the child’s upbringing.

What happens in practice?

1. You fill in the C100 – provide details about yourself, the child, the other parent or carer, and what orders you are seeking (e.g., a “child arrangements order” for residence or contact).

2. You attach any required documents – usually a copy of the child’s birth certificate, a statement of your case (often called a “position statement”), and, if relevant, any evidence of risk (such as police reports or medical notes).

3. You pay the court fee (or apply for a fee exemption if you’re on a low income or receiving certain benefits).

4. You submit the form – either online via the HM Courts & Tribunals Service portal, by post to your local family court, or in person at the court office.

5. The court issues a notice – you’ll receive a copy of the stamped application and a date for the first hearing (often called a “First Directions Appointment” or FDA).

6. The other party is served – the court sends them a copy of your application and they have a chance to respond (usually by filing a “C1A” response form).

7. You prepare for the hearing – gather any additional evidence, think about what you want to say, and consider whether you need mediation or a CAFCASS officer’s report.

8. At the hearing – the judge will listen to both sides, may ask questions, and will decide on next steps (such as ordering a CAFCASS report, setting a timetable for further hearings, or making an interim order).

What do I need to do?

• Read the guidance notes that come with the C100 form (available on GOV.UK) – they explain each section clearly.
• Be accurate and concise when describing the child’s current situation and what you want the court to decide.
• Include any safety concerns clearly; if you fear harm, mention it and attach supporting evidence.
• Check the fee – if you cannot afford it, fill out the EX160 fee‑remission form and submit it with your C100.
• Keep copies of everything you send to the court and any receipts for postage or fees.
• Note the hearing date once you receive it and make sure you can attend (or arrange for a representative if you cannot).
• Consider mediation first – the court may expect you to have tried family mediation unless there are safety issues; a Mediator Information and Assessment Meeting (MIAM) is often required before proceeding.
• Stay calm and focused on the child’s best interests; the judge’s priority is the child’s welfare.

Where can I find more help?

• GOV.UK – C100 form and guidance: https://www.gov.uk/government/publications/form-c100-application-for-a-child-arrangements-order
• Citizens Advice – Family law help: https://www.citizensadvice.org.uk/family/
• Rights of Women – Family law advice line: https://rightsofwomen.org.uk/get-advice/family-law-advice-line/
• Gingerbread – Support for single parents: https://www.gingerbread.org.uk/
• Family Mediation Council – Find a mediator: https://www.familymediationcouncil.org.uk/
• Law Centres Network – Free legal help: https://www.lawcentres.org.uk/

Remember: this is general guidance only. For advice specific to your situation, speak to a solicitor, legal aid provider, or your local Citizens Advice.