How to Dispute an Error on Your Credit Report — Step by Step
A mistake on your credit file — a missed payment that was actually paid, an account that isn't yours, an old debt still marked as open — can quietly cost you a mortgage approval or a good interest...
A mistake on your credit file — a missed payment that was actually paid, an account that isn't yours, an old debt still marked as open — can quietly cost you a mortgage approval or a good interest rate. UK credit reports are more error-prone than most people assume, and correcting them is a formal process, not a phone call.
Why errors happen
Credit reference agencies (Experian, Equifax and TransUnion in the UK) receive data from lenders, and mistakes creep in at the point of reporting: a payment recorded against the wrong month, an account left open after closure, or — increasingly — identity mix-ups where someone with a similar name or a former address link gets tangled into your file. Which?'s guidance on improving your credit score notes that checking your file at all three agencies regularly is one of the simplest ways to catch problems before they affect a big application like a mortgage, and recommends asking agencies to break financial links to former partners if a joint account is dragging your file down.
Checklist: disputing a credit report error
- Pull your report from all three agencies — Experian, Equifax and TransUnion — since lenders don't all report to the same one and errors may only appear on one file
- Identify the specific entry, its date, and which lender reported it
- Gather evidence: bank statements showing payment dates, closure letters, or proof of identity if the issue is a mix-up
- Raise the dispute directly with the credit reference agency in writing, referencing the specific entry
- Also contact the lender that supplied the incorrect information — they're the "data controller" and are obliged to investigate
- Ask for a Notice of Correction to be added to your file while the dispute is ongoing, so lenders see your side of the story in the meantime
- Under UK data protection law, the agency or lender has statutory timescales to investigate — follow up in writing if you don't hear back
- If unresolved, escalate to the Financial Ombudsman Service for lender-related disputes, or the Information Commissioner's Office for data accuracy complaints
Why timing matters
If you're planning to apply for a mortgage or major credit within the next six months, check your file now rather than after a rejection — disputes can take weeks to resolve, and applying with an unresolved error on file can mean an automatic decline or a worse rate offer, even if the error isn't your fault.
International comparison
In the US, the Fair Credit Reporting Act gives consumers a broadly similar right to dispute, with a defined 30-day investigation window for the credit bureau — a right the UK process mirrors informally but with less statutory precision. Australia's credit reporting system, overseen by the Office of the Australian Information Commissioner, follows a comparable complaints-then-regulator escalation path.
Key Numbers
- 3 — main UK credit reference agencies to check (Experian, Equifax, TransUnion)
- 6 months — recommended window to check and resolve errors before a major credit application
- 30 days — typical US statutory dispute investigation window for comparison, under the Fair Credit Reporting Act
Sources
Educational content only — not financial advice.