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uk Money & financial emergencies

What to do if…
your credit score drops sharply overnight and you do not know the reason

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

Short answer

Do not make new non-urgent credit applications yet. Check your statutory credit reports with Experian, Equifax and TransUnion, then contact the named organisation and dispute any entry you do not recognise with the credit reference agency showing it.

Do not do these things

  • Do not make new credit applications “to see if it works”; this can add more hard searches.
  • Do not pay or acknowledge a debt you do not recognise until you have checked whether it is genuinely yours.
  • Do not close accounts just because the score changed; first find the exact report entry that changed.
  • Do not use random “credit fix” services that ask for fees or large amounts of personal information upfront.
  • Do not rely only on the score number. Focus on the credit report entry that changed.

What to do now

  1. Pause any non-urgent borrowing applications while you check the reports. Save screenshots of the alert, the date, the app or website, and anything it says has changed.

  2. Check your statutory credit reports from all three main UK credit reference agencies, because they can hold different information:

    • Experian
    • Equifax
    • TransUnion

  3. Look for the most likely new or changed entry and write down the organisation name, account number if shown, and date:

    • a missed payment marker
    • a default
    • a hard search for a credit application
    • a new account you do not recognise
    • a balance jump
    • a changed address or electoral roll status
    • a financial association with a person you do not recognise

  4. If you see an account, search, address, payment marker or link you do not recognise, contact the organisation named on the entry using contact details from its official website or a statement you already trust. Say that the entry may be fraud or a mistake, ask them to pause any new activity if possible, and ask them to confirm in writing what they will do next.

  5. Dispute the specific entry with the credit reference agency that shows it. Attach simple evidence if you have it, such as confirmation from the lender, proof of your address, or proof that you did not make the application.

  6. If the issue is a wrong link to another person, ask the credit reference agency how to remove or correct the financial association. Keep the request focused on the person and account you do not recognise.

  7. If you need a short explanation visible while the dispute is being checked, ask the credit reference agency about adding a Notice of Correction. Use this only if it helps, because it may slow some lending decisions while the note is considered.

  8. If identity fraud seems likely, consider Cifas Protective Registration so organisations using Cifas data make extra checks when applications are made in your name. If you believe a fraud has happened, report it through the right route:

    • If you live in England, Wales or Northern Ireland, use Report Fraud.
    • If you live in Scotland, report it to Police Scotland online, by phone, or in person; use 101 for a non-emergency.
    • If you are in immediate danger, call 999.

  9. If a bank, lender or credit firm caused the problem and will not fix it, start a formal complaint with that firm. Keep copies, ask for the complaint reference, and wait for the firm’s response route. Many financial services complaints have an eight-week final response route, but some complaint types have different time limits; if the firm does not put it right, you can usually ask the Financial Ombudsman Service to look at it.

What can wait

  • You do not need to “build your score back up” today. First find out what changed.
  • You do not need to cancel all your cards or move banks unless you confirm a problem on a specific account.
  • You do not need to decide today about a mortgage, car finance, consolidation loan or other major borrowing.
  • You do not need to write a long explanation before you know which entry is wrong.

Important reassurance

A sharp score drop is often linked to one visible change, such as a missed payment marker, default, hard search, balance change, new account, or reporting error. Once you find the exact entry, the next step is usually document-based: contact the named organisation, dispute the entry, and keep a record.

Scope note

These are first steps only, to stabilise the situation and prevent avoidable harm. Later decisions may need help from the relevant firm, a regulated advice service, a fraud support route, or another specialist body.

Important note

This is general information, not financial, legal, credit-repair or professional advice. Processes and time limits can vary by organisation, product and complaint type. If you feel pressured, slow down and keep everything in writing where possible.

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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