PO Box 300 Northampton NN1 2TX: Court Letter or Scam? What to Do

Who uses PO Box 300 Northampton?

The Northampton court centre that handles money claims for England and Wales used to be called the County Court Business Centre (CCBC). It is now the Civil National Business Centre (CNBC). Its official postal address, as listed by the courts service, is St Katharine's House, 21-27 St Katharine's Street, Northampton, NN1 2LH.

PO Box 300 does not appear on that official page. It has been reported by people who received claim packs as the return address on the envelope, so it is commonly associated with the court centre. Treat that as a pointer, not proof. Many websites state it as fact without a source.

Remember too that the court is not the one chasing you. If a claim has been issued, the claimant is the creditorHow to Deal with Creditors: Communication and NegotiationPractical advice on communicating with creditors, negotiating affordable repayments, and understanding your rights when dealing with the companies you owe.Read more →, debt buyer or solicitor named on the claim form. The court only processes the case.

What kind of letter have you received?

Court centres send several kinds of paperwork. Look at the heading and the dates to see which one you have.

Step 1: Find the key details on the paperwork

Write these down before you do anything else:

• The claim number and the date the claim was issued
• The claimant's name (who says you owe the money)
• The amount claimed, split into debt, interest and costs
• The deadline to respond, or the date on the notice
• Which route it came through: a paper claim, Money Claim Online, or Online Civil Money Claims

Step 2: Check that it is genuine

The courts service warns that scammers impersonate HMCTS and may demand payment while pretending to be from the court, HMRC or enforcement. Check before you pay or give out personal details.

Use the contact details on the official Civil National Business Centre page, not a number or link printed in the letter. The enquiries line listed there is 0300 123 1056, but check the page itself in case it has changed. Also check the company named as claimant using the FCA Financial Services Register. Our guide explains more: is this debt collection letter a scam?

Step 3: Work out your deadline

The deadline is on your claim papers, so check them first. As a general guide for England and Wales, you have 14 days from the date the particulars of claim are treated as served to respond. If you tell the court you intend to defend by filing an acknowledgment of service, you generally get 28 days from service to file your defence. The date of service depends on how the documents were sent, so it is usually a couple of days after the date of posting.

If you need more time, the official guidance says to use Form N9 (the acknowledgment of service form). Do not guess, and do not assume the deadline has passed. Ring the court or an adviser straight away.

Step 4: Choose how to respond

The right form depends on whether the claim is for a fixed sum or an unspecified amount, and on what you want to say. The official gov.uk guidance sets out the forms.

Where do I send my reply?

Do not assume you should write to PO Box 300. Where you send the forms depends on how the claim was made, according to the official guidance:

• Paper form claim: Civil National Business Centre, St Katharine's House, 21-27 St Katharine's Street, Northampton, NN1 2LH
• Money Claim Online: the same Northampton address, quoting your claim number
• Online Civil Money Claims (claim number includes "MC"): Civil Money Claims, HMCTS CMC, PO Box 12747, Harlow, CM20 9RA

What happens if you ignore it?

If you do not respond in time, the claimant can ask the court for a default judgment. Judgment is not made without that request, but it is quite likely to be requested if you say nothing. A County Court Judgment (CCJ)County Court Judgment (CCJ)A County Court Judgment (CCJ) is a court order, made in England, Wales or Northern Ireland, saying you owe money and must repay it.Read more → is public and stays on your credit fileHow Credit Scores Work in the UKHow UK credit scores work: what the credit reference agencies record, what affects your score, why scores differ between agencies and what lenders actually see.Read more → for six years, which can make credit, rental applications and mortgages harder.

If a CCJ has already been made

If judgment has already been made, our guide to county court judgments explains paying it, applying to set it aside, and how it affects your credit file. Move quickly, because the time to act can be short.

What about bailiffs?

BailiffsHow to Deal with Bailiffs: Your Rights and Their Limits (2026)Learn what bailiffs can and cannot do in England and Wales, the 14-day notice rule, current fees and how to respond.Read more → can only act after a judgment or other legal process. Our guides to dealing with bailiffs and the notice of enforcement explain your rights if a visit is planned.

If you cannot afford to pay

Free, independent help is available from MoneyHelper, StepChangeStepChange Explained: What It Does and How It WorksWhat the debt charity StepChange offers, how its free debt advice and debt management plans work, who it suits and what to expect when you contact them.Read more →, National DebtlineNational Debtline: How It Works, When to CallWhat National Debtline is, who runs it, what it can help with, how to get free advice by phone, webchat or online tools, and what to expect.Read more → and Citizens Advice. See our comparison of free debt advice charities and the priority and non-priority debts guide. In England and Wales a debt adviser can also apply for Breathing Space, a legal pause of up to 60 days. Our debt-to-income calculator shows where you stand. If the letter is a warning rather than a court claim, read our guide to the letter before action.

What if I live in Scotland or Northern Ireland?

The county court system, CCJs and these forms apply to England and Wales. Scotland uses the sheriff court and decrees, and Northern Ireland has its own courts and enforcement system. If your letter comes from a Scottish or Northern Irish court, or you live there, the rules differ, so get advice that applies to your nation.