Brad is on the roll of solicitors of England & Wales but does not hold a practising certificate and does not provide legal advice.
Updated June 2026 · England & Wales
If you have been served with an arbitration claim in England or Wales, Form N15 is the document you use to confirm that the claim has reached you and to set out your initial position. It is a short form, but the choices you make on it matter.
The boxes you tick decide whether you plan to defend the claim, whether you intend to challenge the court's jurisdiction, and whether you will be relying on written evidence. Getting it wrong, or missing the window to return it, can affect how the rest of the proceedings unfold.
This page walks through what Form N15 is for, how each section fits together, and the practical points defendants and their representatives tend to ask about when one lands on the desk.
What this document is
Form N15 is the standard acknowledgment of service used specifically for arbitration claims brought under Part 62 of the Civil Procedure Rules. An arbitration claim covers a range of court applications linked to arbitration, such as challenges to an arbitrator's jurisdiction, applications to enforce or set aside an award, and appeals on a point of law under the Arbitration Act 1996.
When a claimant issues one of these claims, the defendant is given the form so they can formally record that the documents have been received and indicate how they plan to respond. The form runs through sections labelled A to F.
These cover whether the defendant contests the claim, whether they challenge the jurisdiction of the court, an address for service and contact details, the name of any solicitor acting, and whether written evidence will be relied on. It is signed either by the defendant directly or by the solicitor on the record, and returned to the court and the claimant within the time limit fixed by the claim form.
How to use this document
Read the claim form and any supporting evidence carefully. Before putting pen to paper on Form N15, go through the arbitration claim form and any witness statements or exhibits served with it. Understanding what is actually being asked of the court shapes how you complete every section that follows, particularly the jurisdiction and evidence boxes.
Decide your position on the claim and on jurisdiction. Section A asks whether you intend to contest the claim and whether you dispute the court's jurisdiction. These are separate points. You might accept the court has jurisdiction but still want to defend the substance, or you might argue the dispute should have been dealt with entirely in arbitration and never reached the court.
Complete your contact and address details. Section B requires an address for service within the jurisdiction along with your contact information. If a solicitor is acting for you, their details go here too. Accuracy matters because all future documents in the proceedings will be sent to the address you give, so check it carefully before submitting.
Set out your position on written evidence. Section F is where you indicate whether you plan to rely on written evidence such as a witness statement. If you do, you will usually need to file and serve that evidence within the timescale set by the rules or the court. Flagging this early helps the court manage the timetable.
Sign, file and serve within the deadline. Once every section is complete, sign the form and file it with the court listed on the claim form, sending a copy to the claimant. Keep proof of service. Missing the deadline can lead to the claimant applying for judgment or the matter progressing without your input.
Form N15 is completed by the defendant in an arbitration claim, or by a solicitor acting on their behalf. It applies where someone has been served with a claim issued under Part 62 of the Civil Procedure Rules, which covers court applications connected to arbitration proceedings. If you have received a sealed arbitration claim form from the court, the acknowledgment of service is your first formal response.
Q How long do I have to return Form N15?
The deadline is stated on the arbitration claim form you receive, and it is shorter than the period that applies to ordinary civil claims. You should treat the date on the claim form as the operative deadline and work backwards from there. If you think you need more time, it is usually better to ask the court or the other side early rather than letting the deadline pass.
Q What happens if I miss the deadline for filing Form N15?
Failing to file the acknowledgment on time can have serious consequences. The claimant may be able to proceed without your involvement, and in some situations the court can grant the relief sought in the claim. It is often possible to apply for relief from sanctions, but that is a separate application and outcomes are not guaranteed, so acting promptly is far preferable.
Q Can I dispute the court's jurisdiction on Form N15?
Yes. Section A of the form lets you state that you intend to dispute the court's jurisdiction. Ticking that box preserves your right to make a separate application challenging jurisdiction. It is important not to confuse this with simply defending the claim on its merits, because treating the court as having jurisdiction can sometimes be taken as acceptance of it.
Q Do I have to file written evidence with Form N15?
Not at the acknowledgment stage, but Section F asks whether you intend to rely on written evidence later. If you do, that evidence is normally filed and served within the timetable set by the rules or by the court. Flagging your intention early helps everyone plan, and failing to serve evidence when required can limit what you are able to argue at the hearing.
Q Is Form N15 the same as the standard acknowledgment of service?
No. The usual acknowledgment of service in civil claims is Form N9 or N210, depending on the claim type. Form N15 is reserved for arbitration claims brought under Part 62, and it is structured around the specific issues those claims raise, such as jurisdiction challenges and written evidence. Using the correct form matters, so check the claim form to confirm which procedure applies.
Q Do I need a solicitor to complete Form N15?
There is no rule requiring a solicitor, and defendants can complete and file the form themselves. That said, arbitration claims often involve technical points under the Arbitration Act 1996 and the Civil Procedure Rules, so many people prefer to take some guidance before responding. The decisions you make on the form can shape the rest of the proceedings.
The choices you make on Form N15, particularly around jurisdiction and evidence, shape how the rest of the proceedings play out. An experienced legal adviser can help you think through your options based on what you describe on the call.
✓Plain-English answers to your specific questions about Form N15
✓Practical perspective on your position based on what you describe
✓Clarity on what ticking each box on the form actually means
✓Help thinking through your next steps and what to watch out for
Personal call · For information only · Independent advisers
Written & reviewed by
Brad Askew Solicitor (non-practising)
Brad is on the roll of solicitors of England & Wales but does not hold a practising certificate and does not provide legal advice. LegalDocuments.co.uk is not a law firm and does not provide regulated legal advice.
This article is for general information only. It is a tool to help you find your way — not legal advice, and not a substitute for speaking to a qualified adviser about your situation.