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C100 child arrangements application — the father's step-by-step guide

Reviewed by Sean McNamara on 2026-09-04 · Sources: official government and court-service pages linked below · Last full review 2026-09-04

The C100 is the form that starts a private-law children case — child arrangements orders (who a child lives with and when), prohibited steps and specific issue orders, under s.8 Children Act 1989. Fee: £270 (remission available).

Before you fill anything in

  1. Define the order you actually need "Contact alternate weekends and half of school holidays" is an outcome a court can order. "Fairness" is not. Write your proposal in days, times and places before touching the form.
  2. MIAM or exemption You must normally show you considered family mediation first. Exemptions: urgency, domestic abuse, previous MIAM within 4 months, the other party refuses contact with a mediator, and more — full list and evidence.
  3. Gather the facts file Dates of past contact, the messages that show your involvement (school runs, medical appointments), any incidents — dated. Evidence log structure.

Filling the form without sinking yourself

  1. Sections 1–4: the mechanics Names, addresses, the child's details. Straightforward — but check the "help with fees" and previous-proceedings boxes carefully; errors here cause rejection at issue.
  2. Section 5: concerns — the paragraph that decides your first hearing State concerns about the child's welfare, factually: "On 3 March contact was cancelled by message at 18:40 (exhibit 1); child had been packed and ready since 15:00." Never: "she's a narcissist", never accusations you cannot evidence. The court sees emotion as risk and precision as credibility.
  3. The order box Ask exactly for what you drafted in step one. The court can only sensibly direct a case toward what is actually sought.
  4. File and pay Online is fastest via GOV.UK. Paper goes to the family court for the child's area — court finder lists venues. Fee remission: help with fees.

What happens after issue

Typical case arc without findings: FHDRA → interim contact order → DRA (dispute resolution appointment) → final hearing or consent order. With serious allegations: add a findings-of-fact hearing — what that means.

Before your hearing

Turning scattered messages, notes and dates into evidence takes structure. apply this guide to your own documents — EvidenceCanvas is a guided toolkit that helps you draft a child-focused witness statement, answer a Scott Schedule point by point, and assemble a paginated court bundle. It is not a law firm and does not give legal advice.

See how EvidenceCanvas works

Legal Services Act 2007: we provide unregulated procedural information only. We do not conduct litigation, represent anyone, or offer legal advice. Family court proceedings involving children are confidential (FPR Part 12; s.12 Administration of Justice Act 1960). This site publishes no case details, party names, or user content.