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What to do if…
a joint account holder changes your account settings without your knowledge

Produced and maintained by PanicStation.org Published: Last reviewed: Editorial policy UK guide

Short answer

Contact your bank now using an official route, say you are a joint account holder, and ask what they can do today to secure the account while you check what changed.

Do not do these things

  • Don’t confront the other account holder while you are logged into the account or using a shared device; it can escalate and may alert someone who is misusing access.
  • Don’t click links in texts, emails or adverts about “account changes” or “security checks”; use the bank app you already have, the number on your card, or a verified website typed in directly.
  • Don’t call back using a number from an unexpected message or call. If you are unsure, hang up and dial 159, or use the number on the back of your bank card.
  • Don’t assume the bank will automatically notify you about every setting change; treat this as urgent until you have checked it.
  • Don’t move all the money out in a panic or stop essential payments without considering immediate consequences such as missed rent, mortgage payments, bills or arrears.
  • Don’t share passwords, one-time codes, PINs or security answers with anyone, including someone claiming to be from the bank.

What to do now

  1. Use a private device and a safer moment if you can. Use your own phone or computer, not a shared one. If you think your email account is compromised, do not rely on email for security resets until it is secured.

  2. Contact the bank through a safe route. Use the number on your card, the bank’s official app, or dial 159 to reach many UK banks safely.

    • Say: “I’m a joint account holder. A major account setting was changed without telling me. I’m concerned about unauthorised access or misuse and I want the account secured.”

  3. Ask what protective controls the bank can apply today. Depending on the account terms and mandate, ask whether they can:

    • restrict online or app changes temporarily
    • remove unknown devices from online banking
    • reset your online banking credentials
    • restore your phone number, email or address if they were changed
    • add a note that you dispute the change
    • switch on alerts to your own phone or email for logins, new payees, large payments and contact-detail changes

  4. Ask the bank to review the change history with you. Ask specifically whether any of these changed:

    • phone number, email address or postal address
    • paperless statements or statement address
    • saved payees or beneficiaries
    • payment limits or daily transfer limits
    • standing orders or direct debits
    • overdraft settings
    • card controls or mobile-wallet links
    • alerts or notifications

  5. Check transactions and scheduled payments now. Look for transfers you did not make, new payees, edited standing orders, changed direct debits or unusual card payments. If anything looks wrong, tell the bank you are reporting suspected fraud or disputed transactions and ask how they want it logged.

  6. Secure the accounts that control your banking access.

    • Change your online banking password if the bank tells you it is safe to do so.
    • Change your email password from a private device.
    • Turn on two-step verification for your email and banking if available.
    • Check your email for forwarding rules or auto-send rules you did not set.
    • If your mobile signal suddenly stops or you receive SIM-change warnings, contact your mobile network.

  7. Make a brief same-day record. Use the bank’s secure message centre or official complaints route if available. Include what changed, when you noticed, what you have already asked the bank to do, and that you want the account secured and the change reviewed.

  8. If the bank says the other joint holder was allowed to make the change, ask what control is available now. Ask: “What changes require both holders under this mandate? Can extra verification be added to my profile? What options exist to stop further unilateral setting changes?” If the answer is not workable, ask how to start a formal complaint so there is a record.

  9. Protect incoming money that is due soon. If wages, benefits or another important payment is due in the next few days and you are worried funds could be moved, ask the payer what the fastest safe way is to change where the payment is sent. Opening a sole account may be an option, but you do not have to decide every longer-term money issue today.

  10. If this may be fraud rather than only a joint-account disagreement, report it. If you are in England, Wales or Northern Ireland, use Report Fraud. If you are in Scotland, report fraud via 101.

What can wait

  • Deciding whether to close the joint account or separate finances long-term.
  • Working out who was right; your first job is to stop further surprise changes and reduce the chance of loss.
  • Longer identity-protection steps unless there are signs your personal details are being misused.
  • Legal decisions about relationship breakdown, divorce, ownership disputes or wider financial arrangements.

Important reassurance

A joint account is often set up so either holder can operate it, so a surprising change does not always mean a crime has happened. You are still right to treat a sudden major change as a security risk until the bank has helped you check it.

Scope note

These are first steps only, to stabilise the account and reduce the chance of financial loss. Longer-term control of a joint account may need the bank’s formal process and, in some situations, specialist advice.

Important note

This is general information, not legal or financial advice. Bank policies, account terms and joint-account mandates vary, and your bank may be limited in what it can do without both account holders.

Additional Resources

Closely connected guides that may be useful during the same situation or its immediate aftermath.

About this guide

This guide was produced and is maintained by PanicStation.org using its published editorial process. Official and specialist sources are checked where relevant, and AI-assisted tools may be used for drafting, organisation, and consistency checks. The site operator remains responsible for publication, revision, and removal decisions.

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