Is a caller saying my National Insurance number has been compromised a scam?
Yes. No UK government body will call you to say your National Insurance number is compromised and demand you verify it or make a payment.
Last reviewed: 1 August 2026
Explanation
This scam targets UK residents with a recorded or live call claiming their NI number has been used for criminal activity. The caller — often claiming to be HMRC or the police — says the number has been 'suspended' and that warrants are being issued. They ask you to confirm the number, pay a fee to 'protect' it, or stay on the line while the matter is investigated. HMRC and DWP do not make unsolicited calls about NI number fraud. The goal is to extract your real NI number, personal details, or payment. Variants of this scam occur in the US targeting Social Security numbers.
The script relies on fear of officialdom. Talk of suspended numbers, warrants, and criminal cases is designed to bypass your judgement and keep you on the line — sometimes under instruction not to hang up or tell anyone. That isolation is deliberate: the longer you stay engaged and silent, the harder it becomes to step back and question the premise.
Remember what real investigations look like: they do not begin with a robocall, they do not require you to confirm your own number to a stranger, and no genuine officer will ever direct you to pay money to clear your name. Ending the call is not obstruction — it is exactly what the authorities themselves advise.
Common red flags
- Automated or live call claiming your NI or SSN is linked to criminal activity
- Threatens arrest, court action, or account freezing
- Asks you to confirm your number to clear the issue
- Requests payment by bank transfer, crypto, or gift card
What to do now
- Hang up immediately
- Do not confirm, deny, or read out your NI number
- Report the call to Action Fraud (UK) or the FTC (US)
- Contact HMRC directly using their official website if you have genuine concerns
Frequently asked questions
Can my NI or Social Security number actually be suspended?
No. National Insurance numbers and Social Security numbers cannot be suspended or deactivated. Any claim to the contrary is a scam.
I confirmed my NI or Social Security number to the caller. How bad is it?
One number alone has limited use, but combined with your name, address, and date of birth it supports identity fraud. Monitor your credit file, consider a fraud alert, and report the incident to your national fraud service so the attempt is on record.