Health and underwriting
The duty of disclosure
The law puts the obligation on you, not the insurer, to volunteer everything a prudent underwriter would want to know. It is the most commonly misunderstood obligation in insurance and the most common reason a claim gets challenged.
Last reviewed 4 September 2026 · Written and checked by the Best Life Insurance editorial team · How we get paid
In short
- The duty is on the applicant. The insurer is not required to ask the right question for the fact to be material.
- “Material” means anything that would influence a prudent underwriter’s decision to accept the risk or set the terms.
- “I forgot” is not a defence. Nor is “the adviser said it did not matter” or “I did not think it was relevant”.
- The duty continues after you sign, right up until the policy is issued. Anything that changes in between must be told.
- Innocent non-disclosure and deliberate non-disclosure are treated very differently at claim time.
- The safest rule is simple: if you are wondering whether to mention it, mention it.
- Disclosure is also a defence. A disclosed condition that is accepted or specifically excluded can never be used to challenge an unrelated claim.
What this is, plainly
When you apply for life, trauma, TPD or income protection cover in New Zealand, you enter a contract of utmost good faith. That old phrase has a very practical meaning: because the insurer cannot investigate you the way a bank investigates a borrower, the law places the burden on you to tell it everything that matters, whether or not it thought to ask.
This is the reverse of how most consumer contracts work, and it catches people out. The application form is not the boundary of your obligation. If you know something a prudent underwriter would want to know, and the form did not quite ask about it, you are still expected to say it.
The test is not whether you thought it was important. It is whether a reasonable underwriter, assessing this risk, would have wanted it in front of them. That is an objective test applied after the fact, usually by someone reading your medical records with the benefit of hindsight.
What counts as material
There is no closed list, but in practice these are the categories that come up again and again when a claim is examined and something is found missing.
- Any diagnosis, even one you consider resolved or minor, and even one made years ago.
- Symptoms you have had investigated — the referral, the scan, the specialist appointment — regardless of whether anything was found.
- Symptoms you have not yet had investigated. An undiagnosed lump or a persistent pain you have been meaning to see someone about is disclosable.
- Medication, past and present, including anything prescribed short-term and anything you stopped taking.
- Counselling, therapy or any mental health support, whether or not a formal diagnosis was made.
- Your actual alcohol intake and your actual nicotine or vaping use, on the insurer’s stated definition.
- Family history of heritable conditions in parents and siblings, within the ages the insurer specifies.
- Occupation changes, income changes, and any hazardous pastime you take part in.
- Any previous application that was declined, loaded, postponed or accepted with an exclusion.
The duty does not stop when you sign
This is the part almost nobody knows. Your obligation runs until the insurer issues the policy. If you are diagnosed with something, referred for a test, or start a new medication in the six weeks between submitting the application and the policy being issued, you must tell the insurer. The same applies if you take up a new sport, change jobs, or book a trip somewhere the insurer asks about.
Not sure what cover you actually need?
That is the question an adviser is there to answer. Tell us your situation and a licensed New Zealand adviser will compare the market and come back with a written recommendation — including where you can cut cover you do not need.
No cost to you and no obligation. General information only — not personalised financial advice.
What to watch for
These are the details that decide whether the cover does what you expected. Read them before you compare on price.
- Answering only what the form literally asks. The duty is broader than the questionnaire.
- Assuming the insurer will see it in your GP notes anyway. It may not order notes at all, and the omission still counts.
- Letting an adviser summarise your history for you without reading what was written down.
- Treating counselling, physiotherapy or a one-off investigation as not worth mentioning.
- Not updating the insurer about something that happened after you signed but before the policy was issued.
Where an adviser makes a difference
Every New Zealand insurer writes applications and disclosure to its own wording, and the words are where the money is. Two policies that look identical on price can pay very differently when it matters. Closing that gap is the entire job of an adviser.
- An adviser’s job at application is to draw the history out of you properly — the questions behind the questions — so nothing material is missed.
- Where a condition is arguable, an adviser can present it with the right supporting evidence rather than leaving an underwriter to imagine the worst.
- If something changes during underwriting, the adviser handles the update to the insurer so the disclosure is properly recorded.
- At claim time, the adviser is the person who can produce the original application and show that the fact was disclosed.
There are three ways to buy life cover in New Zealand, and they are not equivalent. You can buy direct from one insurer, which means you see one product range and one underwriting appetite. You can buy through your bank, which usually means a single insurer’s product sold under the bank’s brand, often with narrower definitions. Or you can go through an adviser, who quotes several insurers at once and is required to put your interests first.
The premium you pay is the same either way. Insurers build adviser commission into their pricing whether or not an adviser is involved, so going direct does not get you a discount — it just removes the person whose job is to argue your corner at application and at claim time.
- An adviser can see which insurer is currently taking your health history on standard terms, and which one will load or exclude it.
- An adviser can structure cover across two insurers if that produces a better outcome than putting everything with one.
- An adviser handles the underwriting back-and-forth, and is the person who chases the claim when a family is least able to.
- An adviser has to document why the recommendation suits you, which is a written record you can hold them to.
What happens if you get in touch
We are a referral service, not an insurer. We do not quote premiums and we do not sell policies. What we do is put you in front of one licensed New Zealand adviser who can compare the market properly.
- 1
You tell us what you are looking at
The form takes about a minute. Nobody asks for your medical history on a web form — that conversation happens with the adviser, properly, and only once you have decided to proceed.
- 2
An adviser calls you
A licensed New Zealand adviser talks through your situation: who depends on you, what you owe, what you already have in place, and what you are actually worried about.
- 3
They compare the market
The adviser quotes across the major insurers, checks which of them will take your health history on the best terms, and puts the options side by side in writing.
- 4
You decide, in your own time
There is no obligation and no cost to you. If the answer is that you already have enough cover, a good adviser will tell you that.
Frequently asked questions
What happens if I forget to disclose something on my insurance application?
It depends on whether the omission was innocent or deliberate, and whether it was material. If it was innocent and the insurer would still have offered cover — perhaps with a loading — the usual remedy is to adjust the policy or the claim to reflect what would have happened had it known. If the insurer would not have offered cover at all, or if the non-disclosure was deliberate, it can avoid the policy from the start and return the premiums.
Is “I did not think it was relevant” a valid excuse for non-disclosure?
No. The test is objective — whether a prudent underwriter would have wanted to know — not whether you personally thought it mattered. This is why the safe rule is to disclose anything you find yourself weighing up, and let the underwriter decide what is relevant.
Do I have to tell my insurer if I get sick between applying and being accepted?
Yes. The duty of disclosure continues until the policy is issued. A new diagnosis, a new referral, a new prescription or a booked test in that window must be told to the insurer, even though you have already signed the form. Failing to do so is one of the cleanest non-disclosure cases an insurer can run.
What is the difference between innocent and deliberate non-disclosure?
Innocent non-disclosure is a genuine oversight or misunderstanding. Deliberate — sometimes called fraudulent — non-disclosure is knowingly withholding or misstating something. The distinction matters enormously at claim time: innocent non-disclosure is often resolved by putting the policy on the terms it would have had, whereas deliberate non-disclosure typically means the policy is avoided and the claim is not paid.
Can an insurer refuse a claim for something unrelated to what I did not disclose?
It can, and that is what surprises people most. If the non-disclosure was material enough that the insurer would not have issued the policy at all, the whole contract can be unwound — including cover for a claim that has nothing to do with the undisclosed fact. Disclosure is not compartmentalised.
Should I disclose counselling I paid for privately?
Yes. Counselling and therapy are disclosable whether or not they were through your GP, whether or not there was a formal diagnosis, and whether or not you paid privately. It is very common, it is frequently accepted without any effect on life cover, and disclosing it protects your policy in a way that leaving it out does not.