Insurance is a contract of utmost good faith. That phrase does a lot of work, and most people signing a proposal form have never had it explained.
What does “material” mean here?
A fact is material if it would have changed the insurer’s decision — whether to offer cover at all, or on what terms.
That is the whole test, and it is broader than it sounds. It is not “would this have caused a claim”. It is not “is this serious”. It is: would knowing this have made the insurer price differently, add an exclusion, ask for a test, or decline?
A condition that is well controlled and has nothing to do with how someone eventually dies can still be material, because disclosing it would have changed the premium. Materiality is about the underwriting decision, not about causation.
Why is guessing at materiality yourself the risky move?
Because you are guessing at someone else’s decision process, and you only find out you guessed wrong at the point where it costs the most.
The reasoning that gets people into trouble is entirely sensible-sounding: it was years ago, it was minor, the doctor said it was nothing, I am fine now. Each of those may be true and still not answer the question, which is whether an underwriter would have wanted to know.
Handing the decision to the underwriter costs nothing. They see disclosures like yours constantly, most of them change nothing, and the ones that do change something usually change the price rather than the answer.
What actually happens when non-disclosure is found?
Almost always at claim time, when the insurer looks properly at the file for the first time.
Insurers do not verify most of what is on a proposal form when the policy is issued. That is not laziness — verifying every application would make cover unaffordable. The verification happens when there is money to pay out, which means an omission can sit quietly inside a policy for years and surface at the worst possible moment.
An insurer may question a life policy on grounds of fraud, misstatement or suppression of a material fact within three years. After three years it cannot, on those grounds. The window closes, but it closes late.
The person who filled in the form is not the person who deals with the consequences.
Where does the line sit between an omission and a mistake?
The law distinguishes them, and so do insurers in practice — but the distinction is decided after the fact, by other people.
Where an insurer questions a policy on grounds of misstatement or suppression rather than fraud, it has to show the fact was material, and it must communicate the decision in writing with reasons. That is a real protection, and it means an honest error is not treated identically to deliberate concealment.
What it is not is a safety net you can plan around. Being able to argue afterwards that you did not realise something mattered is a much worse position than having mentioned it.
How do you fix an answer you got wrong?
Write to the insurer. Do it now, not later, and keep the correspondence.
If the policy has not yet been issued, this is routine — the underwriter reassesses with the corrected information, which may change the terms and may change nothing. If the policy is already in force, tell them anyway. A voluntary correction is a fundamentally different conversation from a discovery at claim.
Do it in writing rather than on a call. You want a record of what you said and when, and so, in fairness, does the insurer.
What should you actually disclose?
Everything the question asks about, plus anything you find yourself hesitating over.
Hesitation is a useful signal. If you are weighing whether something counts, that weighing is itself evidence that it might — and the cost of mentioning it is a follow-up question, while the cost of omitting it is borne by someone else years from now.
Practical version: give the diagnosis, the date, the treatment and the current status. “Diagnosed 2021, controlled on one medication, last reading normal, reviewed annually” is a case an underwriter can price. “Some blood pressure issues” invites them to assume the worst reasonable interpretation.