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Received an HMRC Tax Refund Letter? How to Verify If It’s Genuine

➡️ This guide explains how to check if your letter is genuine. For more help, don’t forget to explore our other resources:

In 2025, HM Revenue & Customs (HMRC) is sending out millions of letters to taxpayers about potential tax refunds. Some people are entitled to up to £473, and for many, this comes as an unexpected bonus. But with so many letters being issued, there is also a rise in scams and fake HMRC messages.

If you have received a letter claiming you are owed money, you must be careful before taking any action. While some letters are genuine, fraudsters are taking advantage of the situation by sending convincing copies. Knowing how to verify your HMRC letter could save you from financial loss and help you claim your refund safely.

What Is a P800 Letter?

Most official tax refund letters from HMRC are called P800 tax calculation letters. These documents explain:

  • How much income tax you paid.
  • Whether you overpaid or underpaid.
  • The amount of refund due (if any).

The P800 is sent by post and may also appear in your online HMRC account. If you receive such a letter, it’s essential to cross-check it with your online records.

Signs Your Letter Is Genuine

When you receive an HMRC letter, look for:

  • Official HMRC logo and header – though scammers can copy logos, the formatting is usually slightly off.
  • Your correct name and address – official letters use the exact details registered with HMRC.
  • Reference number – HMRC letters always include your unique taxpayer reference (UTR) or National Insurance number.
  • Clear instructions – official letters direct you to gov.uk for more details, never to suspicious websites.

If any of these elements are missing or look unusual, be cautious.

Common Scam Tactics

Fraudulent HMRC letters or emails may:

  • Urge you to act immediately or risk losing your refund.
  • Ask for your bank details directly by email or phone.
  • Provide a link that does not end with gov.uk.
  • Contain spelling errors or generic greetings like “Dear customer”.

Remember: HMRC never asks for sensitive information over text, WhatsApp, or random emails.

How to Double-Check Your Letter

  1. Log into your HMRC online account – if the letter is genuine, the same information will be visible there.
  2. Call HMRC using the official helpline – never use phone numbers given in suspicious letters; instead, use the contact number listed on gov.uk.
  3. Check the reference number – it should match your records and previous correspondence.
  4. Compare formatting – genuine HMRC letters are professionally formatted; scams often look slightly different.

➡️ If you are sure your letter is real and want to proceed, read: How to Claim Your Refund Online.

Why Verifying Matters in 2025

Scammers know that refunds are a hot topic this year. With HMRC confirming millions of people may be eligible, fraudsters are trying harder than ever to exploit the situation. This is why verifying your letter before acting is essential for your financial safety.

FAQs

Does everyone get a P800 letter?
No. Only those with overpayments or adjustments will receive one.

How do I know if my HMRC letter is a scam?
Check the web address, reference numbers, and spelling. If in doubt, contact HMRC via gov.uk.

What should I do if I suspect fraud?
Report the letter to HMRC’s phishing service and avoid giving out personal information.

Can I verify a letter by phone?
Yes, but always call the official HMRC contact number, not the one on the suspicious letter.

What if the letter is real — how do I claim?
You can claim online or by following official HMRC instructions. See our guide: How to Claim a Refund.

Conclusion

Receiving a letter from HMRC can be exciting, especially if it says you’re due a refund. But in 2025, with so many scams circulating, verifying the authenticity of your letter is the most important step.