Real HMRC / IRS Letter vs Tax Scam Call
How to tell a genuine tax-authority letter from a threatening phone scam claiming you owe taxes.
Last reviewed: 1 June 2026
Tax authorities really do contact people about money they believe is owed, and those letters are not pleasant to receive. The genuine process is slow and paper-heavy: a formal letter arrives by post, it carries your reference, it explains what you can do about it, and it leaves you time and a right to appeal. Scam calls work by removing every part of that. Someone rings, states a figure, and attaches a consequence that lands today rather than in writing, which pushes people into acting before thinking. A quiet fear of the tax office is common even among people who have done nothing wrong, and that fear does most of the work. The distinction that matters most is whether you are allowed to hang up and check. A genuine matter survives the call ending. A scam does not.
Side-by-side comparison
| Genuine tax authority contact | Tax scam call or message | |
|---|---|---|
| First contact method | Sends a formal letter by post before any phone call | Opens with an unsolicited call, email, or text threatening immediate arrest or penalty |
| Payment methods accepted | Bank transfer to official account, online portal, or cheque — never gift cards or crypto | Demands gift cards, wire transfer, or cryptocurrency to resolve the 'debt' immediately |
| Tone and urgency | Formal and factual; gives time to respond and right to appeal | Threatens arrest, deportation, or licence suspension within hours unless you pay now |
| Caller ID | May call from a published number; always refers you back to official website to verify | Spoofs an official number; discourages you from hanging up or checking independently |
| Personal detail handling | Never asks for full bank details, passwords, or PIN over the phone | Asks you to confirm bank account, sort code, or social security number to 'release the hold' |
| Right to verify | Encourages you to call back on the number on your official correspondence | Insists you stay on the line; says calling back will invalidate your case |
Common red flags
- Caller demands gift cards, crypto, or immediate wire transfer
- Threatens police arrest if you hang up
- Refuses to let you call back on the official published number
- Claims your case is sealed and cannot be discussed with an adviser
- Asks for passwords, PINs, or card CVV numbers
Verification steps
- Hang up and call the number printed on your latest official letter or on the official government website
- Log in to your tax account on the official portal to check for any genuine notices
- Check the caller ID against numbers published on the official site — but remember numbers can be spoofed
- Ask a tax professional or Citizens Advice before making any payment
What not to do
- Do not stay on the line under pressure — hang up and verify independently
- Do not buy gift cards or send cryptocurrency to settle any claimed tax debt
- Do not give bank details, passwords, or payment card numbers to an incoming caller
A safe response
Hang up. You do not owe the caller an explanation, though saying once that you will call the tax office back on their published number is enough if you want to say something. Then find that number yourself, from your own correspondence or by typing the official government address into your browser, and ask whether anything is outstanding. Log in to your tax account and look. If you have already paid, particularly by gift card, transfer or cryptocurrency, contact your bank or card issuer immediately and report it to your national fraud reporting service. Keep receipts and any numbers that called you. These calls are built by people who do this all day.
Frequently asked questions
The caller knew my address and part of my National Insurance or Social Security number. Does that prove they are genuine?
No. Fragments of personal data circulate widely after breaches, and some details sit in public records, so a caller reciting them proves only that they have a list. Genuine officials expect you to verify them rather than the other way round, and none of them require you to stay on the line. Hang up, call the number published on the official government website or printed on your own correspondence, and check your tax account while you are there.
Will I be arrested if I hang up on a tax call?
No. Tax authorities do not have police powers and do not threaten immediate arrest over unpaid tax. Any caller who makes that threat is running a scam.
Can real tax authorities send texts or emails?
Some do send brief notifications by email or text, but they direct you to log in to your existing account on the official site — they never include a payment link or ask for credentials in the message itself.