Unfair default on your credit file? How to challenge it

A default on your credit file says you seriously failed to repay - and it stays there for six years, pushing up the cost of everything from mortgages to phone contracts. If the default is accurate, it generally stays. But defaults are recorded wrongly more often than people assume: wrong dates, missed notices, arrears caused by the lender's own errors, or lending that should never have been made.

This guide covers when a default is genuinely challengeable, how to run the dispute, and what a fair outcome includes beyond just deleting the marker.

Key takeaways

• A default normally reflects the relationship breaking down - industry guidance expects it to be recorded when you are typically three to six months in arrears, not sooner.
• Defaults stay for six years from the default date - so a wrong date is itself worth challenging.
• The lender owns the data: credit reference agencies can only query it. Complain to the lender, with the agencies' dispute route in parallel.
• Strong challenges: not your debt, lender error caused the arrears, no default notice, disputed balance, or unaffordable lending behind the account.
• Credit-file accuracy complaints go to the Financial Ombudsman Service, which is free.

Is your default actually challengeable?

Be honest with yourself here - it saves months. Work down this list:

Likely challengeable:

• The debt is not yours - identity fraud, or a family member's account tangled with your details. If fraud, say so explicitly: that is a fraud dispute, not just a data dispute.
• The lender's own error caused the arrears - a mis-applied payment, a direct debit the firm cancelled, a payment plan it agreed then ignored.
• You never got a default notice. Most regulated agreements require one, with time to remedy, before a default is registered.
• The default date is wrong - recorded long after the arrears crystallised, extending the six-year shadow. Guidance expects the date to reflect when the relationship realistically broke down.
• The balance was in genuine dispute - defaulting you mid-dispute over, say, a disputed interest charge or a billing error is challengeable.
• The lending was unaffordable. When an unaffordable lending complaint or payday refund complaint succeeds, removing the associated negative markers is a standard part of the redress.
• An arrangement was in place - you agreed a payment plan, kept to it, and got defaulted anyway.

Usually not challengeable:

• The arrears were real, the notices arrived, and the marker is accurate. Then the six years run - though a notice of correction (a short statement on your file) lets you add context that lenders reading it can weigh.

How the dispute actually works

1. Get all three reports - Experian, Equifax and TransUnion - via free statutory access. Defaults are often reported inconsistently across them, which is itself useful evidence.
2. Write to the lender - a formal complaint, not a webchat. State what is wrong (marker, date, or balance), attach the evidence, and say what you want recorded instead.
3. Ask for the paperwork: a copy of the default notice it says it sent, the account statements, and the arrears history. Gaps in what it can produce strengthen your position.
4. Dispute with the agencies in parallel - each has a dispute process and must query the data with the lender. This rarely resolves alone, but it timestamps your challenge.
5. Escalate on a rejection. The Financial Ombudsman looks at credit-file complaints regularly and can direct a lender to amend or remove information and pay compensation for the impact.

Sources: Consumer Credit Act 1974, section 87 (default notices) and Financial Ombudsman Service guidance on credit and borrowing complaints. Last checked: 04.07.2026.

What evidence helps most

• your credit reports showing the entry - all three agencies
• statements showing the payments you actually made
• the default notice, or the lender's inability to produce one
• correspondence about any payment arrangement, dispute or lender error
• for fraud: an Action Fraud reference and the fraud team's correspondence
• evidence of impact: a mortgage or loan declined, a rate you were quoted, a tenancy affected

What to ask for

Removal is not the only remedy - ask for what fits:

• remove the default entirely, at all three agencies
• correct the default date so the six years run from the right point
• replace it with accurate arrears history, where some arrears were real but a default was excessive
• compensation for demonstrable financial impact and distress - a wrongly defaulted file that cost you a mortgage rate is a quantifiable loss
• written confirmation of exactly what will be amended, so you can verify it at each agency

Beware of "credit repair" firms charging to remove accurate defaults - accurate data will not be deleted for a fee, and the dispute routes above are free.

When and how to escalate

If the lender rejects the complaint or eight weeks pass, you can take it to the Financial Ombudsman Service. The Financial Ombudsman Service is free, independent, and you keep any compensation it awards. The usual six-month window from the final response applies - check the current time limits.

For context, our analysis of published Ombudsman decisions shows credit complaints are one of the stronger broad groups, but inaccurate-file cases still depend on documents.

How HeyRefund can help

Default disputes are paperwork battles: what was sent, when, what the account history really shows, and what three different agencies are reporting. HeyRefund helps you line up the reports, the notices and the timeline into a complaint the lender has to answer properly.

Disputing your credit file and going to the Ombudsman are free. HeyRefund just organises the fight.