What are the most common reasons insurance claims get denied?

The top reasons are: a policy exclusion (the loss isn't covered), late notification, insufficient documentation, a coverage limit cap, non-disclosure at the time of application, and the insurer disputing the cause of damage.

Do I need a lawyer to appeal an insurance claim?

No — most first-level appeals are handled directly with the insurer in writing. Only escalate to a lawyer or public adjuster if your appeal is denied a second time or the claim value justifies the cost.

Guide

How to write an insurance claim appeal letter

Updated June 2026 · ~8 minute read

A denied claim isn't the end of the road. Insurers reverse a meaningful share of denials when policyholders push back in writing with the right evidence. This guide walks you through what an appeal letter should contain, a copy-and-paste template, and how to escalate if your insurer still says no.

1. Read the denial letter carefully

Every denial letter cites a specific reason and quotes the policy section the insurer is relying on. That reason is the only thing your appeal needs to address — don't relitigate the whole claim.

Find and write down:

The exact denial reason (e.g. "wear and tear exclusion, Section 4.2").
The deadline to appeal (usually 30–180 days).
Where to send the appeal (often a dedicated complaints address, not your usual adjuster).

2. Gather your evidence

The strongest appeals are short letters with strong attachments. Depending on the denial reason, useful evidence includes:

Photos and videos of the damage (dated).
Repair estimates or invoices from licensed contractors.
An independent expert report (engineer, mechanic, doctor).
The original policy schedule and any endorsements.
Correspondence with the insurer (emails, call notes with date and adjuster name).
Weather reports, police reports, or incident reports if relevant.

3. What to include in the letter

A good appeal letter has six parts, in this order:

Header: your name, policy number, claim number, date of loss.
Statement of appeal: one sentence saying you are formally appealing the decision of [date].
The denial reason, quoted back: shows you've read the letter.
Why the denial is wrong: reference the specific policy clause that covers your loss, or the fact pattern the insurer missed.
Evidence list: a numbered list of attachments.
What you want: reverse the denial and pay $X, with a response deadline (14 or 30 days).

4. Free appeal letter template

[Your name]
[Address]
[Email · Phone]

[Date]

[Insurer name]
Claims Appeals Department
[Address from the denial letter]

Re: Formal appeal of denied claim
Policy number: [#######]
Claim number: [#######]
Date of loss: [DD Month YYYY]

To the Claims Appeals Team,

I am writing to formally appeal the decision dated [date of denial letter]
to deny my claim referenced above.

Your letter stated the claim was denied because:
"[paste the exact reason and clause cited]."

I respectfully disagree for the following reasons:

1. [Fact / policy clause that supports coverage]
2. [Second reason, with reference to attached evidence]
3. [Third reason, if applicable]

In support of this appeal I enclose:
  - Exhibit A: [e.g. independent contractor estimate dated DD/MM/YYYY]
  - Exhibit B: [e.g. dated photos of the damage]
  - Exhibit C: [e.g. weather report for the date of loss]
  - Exhibit D: [e.g. policy schedule, Section X clause Y]

Based on the above, I request that you reverse the denial and settle
the claim in the amount of $[amount] in line with the policy.

Please confirm receipt of this appeal in writing and provide your
decision within [14 / 30] days. If the appeal is not upheld, please
also send the contact details of your external dispute resolution
scheme and your final response letter so that I can escalate.

Yours sincerely,
[Your name]

5. Common denial reasons — and how to rebut each

“The loss falls under a policy exclusion”

Read the exclusion clause word for word. Exclusions are interpreted narrowly. If the cause of your loss isn't specifically listed, argue that the exclusion doesn't apply and cite the insuring clause that does.

“Wear and tear, not sudden damage”

Get a contractor or engineer report stating the damage is sudden and accidental (e.g. a burst pipe, not a slow leak). The independent opinion almost always carries more weight than the insurer's desk-based assessment.

“You notified us too late”

Most policies require prompt notification, not instantaneous. Show when you became aware of the loss and that you notified them within a reasonable time, and that the delay did not prejudice their ability to investigate.

“Insufficient documentation”

Send the missing documents with your appeal, organised as numbered exhibits. Don't make the adjuster hunt for them.

“Non-disclosure at application”

This is serious — it can void the policy. Show either that the fact wasn't material to the risk, or that it was disclosed (with evidence: application copy, email, broker note).

6. If your appeal is denied

You have three further options, usually in this order:

Request a final response letter in writing — most jurisdictions require the insurer to issue one before you can escalate externally.
File with the external dispute scheme — free for the consumer (e.g. the Financial Ombudsman in the UK, your state department of insurance in the US, AFCA in Australia). They can order the insurer to pay.
Engage a public adjuster or lawyer — usually only worthwhile for higher-value claims, as they typically take 10–30% of any recovery.

Before you send your appeal

Sanity-check the denial in minutes — $7

Upload your policy and denial letter and PolicyPal's Claim Clarity checks whether the cited exclusion actually applies, and flags the clauses you should be quoting back in your appeal.

Run Claim Clarity

7. FAQ

How long do I have to appeal a denied insurance claim?

Most insurers give you between 30 and 180 days from the date on the denial letter. The exact deadline is in that letter and in your policy's claims section. Miss it and you usually lose the right to appeal internally.

What are the most common reasons claims get denied?

Policy exclusions, late notification, insufficient documentation, exceeding a coverage cap, non-disclosure at application, and disputes over the cause of damage.

Do I need a lawyer to appeal?

No — most first-level appeals are handled in writing directly with the insurer. Only escalate to a lawyer or public adjuster if your second appeal is denied or the claim value justifies the cost.

This guide is informational only and is not legal, financial or insurance advice. Always confirm coverage and your appeal rights with your insurer or a qualified advisor.