How do I know if my identity has been stolen?
Common signs include unfamiliar accounts on your credit report, bills or collection notices for debts you didn't incur, tax filing rejections, and unexplained benefit or benefit-application activity.
Last reviewed: 10 June 2026
Explanation
Identity theft often goes undetected for months or years because the fraudster is careful not to disturb your everyday accounts — they open new ones instead. The most reliable early detection method is checking your credit report regularly. In many countries you can access your report for free from the major credit bureaus. Look for credit accounts, loans, or hard inquiries you don't recognise.
Other signs appear in your physical and digital mail. Bills from companies you've never done business with, collection agency letters, or medical bills for treatment you never received can all indicate someone is using your identity. In the US, receiving a tax rejection notice because a return was already filed under your Social Security Number is a strong sign of tax identity theft.
Government benefit fraud is another form: you may only discover it when you apply for benefits yourself and are told you're already receiving them. Employment identity theft — where someone uses your Social Security or National Insurance number to gain employment — can surface when you receive tax documents from employers you've never worked for.
Place a fraud alert or credit freeze with the credit bureaus if you suspect identity theft. This prevents new credit being opened in your name. Then file a report with your national identity theft authority and your local police, as these reports are often required by banks and creditors when disputing fraudulent accounts.
Common red flags
- Unfamiliar accounts or hard inquiries on your credit report
- Collection calls or letters for debts you don't owe
- Tax return rejected because one was already filed under your details
- Medical bills for treatment you never received
- Benefit claims denied because you're 'already enrolled'
- Mail for credit cards or loans arrives that you didn't apply for
- Your credit score drops sharply for no reason you can identify
What to do now
- Pull your credit report from all major bureaus and review every account and inquiry
- Place a fraud alert or credit freeze with each credit bureau — a freeze is stronger and free in most countries
- File an identity theft report with your national authority (FTC IdentityTheft.gov in the US)
- File a police report — many creditors require this when disputing fraudulent accounts
- Contact every institution where a fraudulent account was opened and provide your report number
- Change passwords for financial and government accounts and enable two-factor authentication
- Monitor your credit report monthly for the next year
Frequently asked questions
What is the difference between a fraud alert and a credit freeze?
A fraud alert tells lenders to take extra steps to verify identity before opening new credit. A credit freeze goes further by blocking any new credit inquiry entirely until you lift it — stronger protection but requires action when you legitimately need credit.
Can identity theft be reversed?
Yes, though it takes time and documentation. Keeping copies of all reports, correspondence, and disputed account details speeds the process considerably.