How to challenge an insurer that rejected, delayed or underpaid your claim

If your insurer rejected your claim, delayed it, or paid less than you expected, do not argue in general terms. Find the specific reason behind the decision and challenge that reason with policy wording, evidence and a clear timeline. If the insurer does not put things right, you can escalate to the Financial Ombudsman Service for free.

Insurance complaints usually turn on precision. "This is unfair" is easy to dismiss. "Your exclusion does not apply because..." is much harder to ignore.

Key takeaways

• Insurers usually rely on a specific reason: an exclusion, alleged non-disclosure, late notification, causation, valuation or underinsurance.
• For consumer non-disclosure, the test is whether you took reasonable care not to make a misrepresentation.
• Delay can be a complaint in its own right if the insurer did not handle the claim promptly and fairly.
• Underpayment disputes usually need independent evidence: valuations, repair quotes, receipts or expert reports.
• The Financial Ombudsman Service is free and independent.

Who this guide is for

This guide is for consumers with a personal insurance problem, including:

• home insurance claim rejection
• motor insurance valuation or write-off dispute
• travel insurance refusal
• pet, gadget, life or protection claim delay
• an insurer that accepted the claim but paid too little
• a policy voidance or alleged misrepresentation issue

It is most useful once you have a rejection letter, low offer, delay history or final response.

The three problems: rejected, delayed, underpaid

Rejected means the insurer says it does not have to pay. The reason might be a policy exclusion, alleged misrepresentation, late notice, lack of proof, or a dispute over what caused the loss.

Delayed means the insurer has not made a timely decision or keeps asking for the same information. Some investigation is legitimate, but unexplained drift is different.

Underpaid means the insurer accepted some responsibility but offered less than you think the claim is worth. That could be because of valuation, deductions, "wear and tear," policy limits or underinsurance.

Why insurers say no

Common reasons include:

• Policy exclusion: the insurer says the event is outside cover.
• Non-disclosure or misrepresentation: it says you answered a question incorrectly when taking out or renewing the policy.
• Late notification: it says you reported the claim too late.
• Causation: it accepts damage happened but says the cause is not covered.
• Valuation: it says the item, car, repair or loss is worth less than you say.
• Underinsurance: it says the sum insured was too low and applies an "average" reduction.

For consumer insurance, the Consumer Insurance (Disclosure and Representations) Act 2012 says the consumer has a duty to take reasonable care not to make a misrepresentation. That is not the same as a duty to volunteer every possible detail.

Sources: Consumer Insurance (Disclosure and Representations) Act 2012, FCA ICOBS 8 claims handling rules, and Financial Ombudsman Service compensation guidance. Last checked: 23.06.2026.

Common mistakes that weaken insurance complaints

• Arguing broad unfairness instead of the insurer's specific reason.
• Not reading the exact policy wording.
• Accepting a low offer before asking how it was calculated.
• Not getting independent evidence where valuation or causation is disputed.
• Letting delay continue without creating a dated complaint trail.
• Mixing different complaints together, such as a claim refusal and a mis-sale issue.

How to decode the rejection letter

Read the letter once for the conclusion, then again for the reason.

Look for:

1. The policy clause or exclusion the insurer relies on.
2. The factual finding it made.
3. The evidence it says is missing.
4. Any deadline or policy condition it says you breached.
5. The outcome it is offering, if any.

Then ask: does the wording actually apply to your facts? If not, your complaint should focus on that gap.

What evidence helps most?

Useful evidence includes:

• policy schedule and full policy wording
• claim form and supporting documents
• photos or video of the damage or loss
• repair quotes, replacement quotes or market valuations
• expert reports from surveyors, engineers, vets, mechanics or other specialists
• receipts, invoices and ownership evidence
• all claim correspondence
• a timeline of calls, emails and promised dates
• the insurer's rejection, low offer or final response

For delay, the timeline is central. For valuation, independent figures matter. For misrepresentation, the exact question and answer matter.

What to ask the insurer

Ask the insurer to explain:

• which clause, exclusion or condition it relies on
• how that wording applies to your specific facts
• what evidence it considered and what it ignored
• if it alleges misrepresentation, what question it says you answered wrongly
• whether it treats any misrepresentation as careless or deliberate/reckless
• how it calculated any deduction, valuation or average clause reduction
• why each period of delay happened

These questions turn a vague refusal into something testable.

How to structure the complaint

Use a short, factual structure:

1. Policy and claim details: policy number, claim number, date of loss.
2. Decision challenged: rejection, delay or underpayment.
3. Insurer's reason: quote the reason in its own words.
4. Your response: explain why the reason is wrong or incomplete.
5. Evidence: list the attached documents.
6. Outcome requested: payment, revised valuation, explanation, interest, or distress/inconvenience redress where appropriate.

When and how to escalate

If the insurer sends a final response you disagree with, or eight weeks pass without resolution, you can take the complaint to the Financial Ombudsman Service.

The Financial Ombudsman Service is free, independent, and you keep any compensation it awards. You normally need to complain within the relevant time limit, including the usual six-month window from the firm's final response, so check the current rules before waiting.

How HeyRefund can help

Insurance complaints are evidence problems. HeyRefund helps you organise the policy wording, claim timeline, rejection reason, expert evidence and requested outcome into a clearer complaint you can send yourself.

You can do this free without a paid company. HeyRefund just helps make the file sharper.