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uk Money & financial emergencies bank address changed • mailing address changed • address changed without permission • unauthorised address change • bank security alert • bank account takeover • someone changed my bank address • bank profile details changed • bank contact details changed • bank letter to wrong address • mail redirection fraud • stolen post banking letters • identity theft bank account • account hacked bank app • phishing then address change • new address on my account • unexpected address update • bank fraud team • protect my bank account now

What to do if…
your bank alerts you that your mailing address was changed and you did not do it

Short answer

Treat this as possible account takeover: contact your bank via a trusted route now, ask them to revert the address and add extra security, and ask for temporary holds/blocks where possible so no further changes or payments can be made while they investigate.

Do not do these things

  • Don’t click links or call numbers from the alert message if you can avoid it; use the number on the back of your card or your bank’s official app/website.
  • Don’t stay on the phone to someone who contacted you unexpectedly “about your account” — end the call and contact the bank yourself.
  • Don’t assume it’s “just a typo” until the bank confirms what changed, when, and how.
  • Don’t keep using the same password/PIN if there’s any chance your login or email has been compromised.
  • Don’t let the bank “just change it back” without also checking for other changes (phone, email, new payees, “paperless” settings).

What to do now

  1. Contact your bank’s fraud/security team immediately (trusted channel).
    If the alert followed an unexpected call/text, you can also hang up and dial 159 (where supported) to reach your bank safely.
    Ask the bank to:
    • Revert your address to the correct one.
    • Stop further profile changes (ask for extra verification on any future address/phone/email changes).
    • Put temporary holds/blocks where possible on outbound transfers, new payees, card replacements, cheque book orders, and other high-risk changes until checks are complete.
    • Review recent activity with you: new payees, standing orders, direct debits, card reissues, PIN/password resets, new devices, failed logins, and any pending payments they may be able to cancel.
  2. Lock down the accounts that can “reset” your bank access (usually email and phone).
    • Change your email password first and turn on 2-step verification.
    • Then change your banking password/passcode, and sign out of other sessions/devices if your bank allows it.
    • If you suddenly stop receiving calls/texts or your phone shows “no service,” contact your mobile network urgently (this can be a sign your number is being taken over).
  3. Turn on the most useful alerts (so you’re not relying on one message).
    In your bank app, enable alerts for: logins/new devices, new payees, transfers, card replacements, and profile/contact-detail changes.
  4. Treat post interception as a real risk (because address changes can be used to catch replacement cards and letters).
    • Tell your bank to avoid sending sensitive items (like replacement cards) until you confirm everything is secure.
    • If you suspect your post has been interfered with, contact Royal Mail about Redirection (and, if you need a short-term pause, Keepsafe) and ask what protective options are available for your address.
  5. Create a paper trail while it’s fresh.
    Save screenshots of the alert and write down: date/time, what changed, when you last logged in normally, and any unusual messages/calls. Note the name/department of anyone you speak to at the bank.
  6. Add protective friction beyond the bank (optional but useful).
    • Consider reporting identity fraud through the UK’s national reporting route (Report Fraud/Action Fraud).
    • Consider Cifas Protective Registration if you think your details are being misused, so organisations that are members carry out extra checks when credit is applied for in your name.
  7. Check your credit file for a “new address” or new credit.
    If you see an unfamiliar address, searches, or accounts you don’t recognise, raise a dispute with the relevant credit reference agency and keep dated notes of what you reported.

What can wait

  • You do not need to decide today whether to close the account or switch banks.
  • You do not need to work out exactly how the change happened before you act.
  • You can deal with longer complaints/escalations later once your account is stable and no further changes/payments are happening.

Important reassurance

An unexpected address change is a common move in fraud because it can help intercept replacement cards and verification letters. Acting quickly to stop further changes and reduce what can be sent or paid out is usually the most effective way to limit harm.

Scope note

These are first-step containment actions only. Once your account is secured, you may need follow-up help from your bank, credit reference agencies, and (if needed) formal complaints routes.

Important note

This is general information, not legal or financial advice. Processes vary by bank and your circumstances. If you can only do two things right now: (1) contact your bank via a trusted route and stop further changes, and (2) secure your email—then work through the rest in calm, documented steps.

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