---
title: "Letter to an insurer disputing avoidance or reduction of a claim for non-disclosure or misrepresentation"
url: "https://ailawframework.com/precedents/insurance-law/letter-disputing-avoidance-or-reduction-for-non-disclosure"
type: "precedent"
site: "AI Law Framework"
id: "a22-letter-disputing-avoidance-or-reduction-for-non-disclosure"
area_id: "A22"
kind: "letter"
ai_level: "yellow"
version: 1
task_ids: ["A22-T1-R9"]
law_stated_as_at: "2026-10-18"
---

# Letter to an insurer disputing avoidance or reduction of a claim for non-disclosure or misrepresentation

> A letter for an insured disputing an insurer's decision to avoid a general insurance policy or reduce a claim for non-disclosure or misrepresentation, testing the decision against ss 20B, 21, 22, 27AA and 28 of the…

Canonical page: https://ailawframework.com/precedents/insurance-law/letter-disputing-avoidance-or-reduction-for-non-disclosure  
Law stated as at: 2026-10-18

Site index for agents: https://ailawframework.com/llms.txt

A letter for an insured disputing an insurer's decision to avoid a general insurance policy or reduce a claim for non-disclosure or misrepresentation, testing the decision against ss 20B, 21, 22, 27AA and 28 of the Insurance Contracts Act 1984 (Cth).

## Key facts

- Kind: Letter. A letter or email you adapt and send.
- Practice area: [Insurance Law](https://ailawframework.com/precedents/insurance-law.md)
- Jurisdictions: Australia
- AI level: Yellow. AI can help in set ways. A lawyer checks specific points before use.
- Law stated as at: 2026-10-18
- Status: Maintained. Checked on 2026-10-18 against the 4 authorities it cites, for Australia.

## When to use it

Use when an insurer has declined a claim, cancelled or avoided a policy, or reduced a payment because of something the insured did or did not say before the contract was entered into or renewed. Choose the consumer or non-consumer section first.

## Used for these tasks

- [Build a non-disclosure or misrepresentation table from application and claim](https://ailawframework.com/practice/insurance-law/build-a-non-disclosure-or-misrepresentation-table-from-application-and-c.md)

## How AI may be used

AI may build the table comparing the proposal questions, the answers given and what the insurer says was not disclosed; the lawyer decides which duty applies, whether the insurer's case is made out and what the letter asserts.

**AI may:**

- Extract each proposal or renewal question and the answer given into a comparison table
- Match the insurer's allegations to the documents and list what evidence the insurer has not provided
- Draft the factual sections of the letter from the verified table

**AI must not:**

- Must not decide whether the contract is a consumer insurance contract or whether a failure was fraudulent
- Must not assert what the insurer would have done (underwriting) without evidence from the insurer
- Must not make statements about the insured's knowledge or state of mind that the client has not confirmed

**The lawyer checks:**

- Whether the policy is a consumer insurance contract (s 20B applies) or another contract (s 21 applies), at the relevant inception or renewal
- For s 21, whether the insurer gave the written s 22 notice; if not, it cannot rely on non-fraudulent non-disclosure
- Whether the insurer has shown it would not have entered into the contract on the same terms (s 28(1)) and, if reducing, how it calculated the prejudice (s 28(3))
- Every factual statement in the letter has been confirmed by the client and the documents

## Authorities

- [Insurance Contracts Act 1984 (Cth) Pt IV Div 1A, s 20B (consumer insurance contracts: duty to take reasonable care not to make a misrepresentation)](https://www.legislation.gov.au/C2004A02944/latest/text)
- [Insurance Contracts Act 1984 (Cth) ss 21 and 22 (duty of disclosure for other contracts; insurer must inform the insured of the duty in writing)](https://www.legislation.gov.au/C2004A02944/latest/text)
- [Insurance Contracts Act 1984 (Cth) s 27AA (meaning of relevant failure) and s 28 (remedies in general insurance: avoidance only for fraud, otherwise reduction to the prejudice suffered)](https://www.legislation.gov.au/C2004A02944/latest/text)
- [General Insurance Code of Practice (current version, Insurance Council of Australia), paras 81, 82 and Part 12 (reasons for decisions and access to information)](https://insurancecouncil.com.au/cop/)

## Full text and drafting notes

The full text and the drafting notes are not part of this public page. Signed-in firm accounts can read them at https://ailawframework.com/precedents/insurance-law/letter-disputing-avoidance-or-reduction-for-non-disclosure and through the signed-in MCP connector https://ailawframework.com/mcp/firm.

*Practice guidance for planning and review. Confirm current primary sources and the requirements of the actual matter. This is general information, not legal advice.*