The family-history section of an insurance form assumes you know your parents. It asks whether your mother or father had heart disease, cancer, diabetes or a stroke, and at what age. If you were adopted and have never met them, the honest answer is short: not known. That is what to put on an insurance form when you were adopted and do not have your family medical history, and it is an answer underwriters see all the time.
It can feel like a trap — as though a blank will be read as evasion, or as though you are supposed to have chased the information down before applying. Neither is true. The law that governs how you fill in the form asks you to take reasonable care with what you actually know. It does not require you to produce facts you were never given.
This page explains why "not known" is a complete and accurate answer, what the question is really trying to measure, how an underwriter handles the gap where a family history would normally sit, and — if you want to close the gap — how an adopted adult can try to obtain birth-family health information, along with the honest caveat that you are under no obligation to do so before applying.
At a glance
- "Not known" is an honest, accurate and accepted answer to the family-history question when you were adopted.
- The Consumer Insurance (Disclosure and Representations) Act 2012 requires reasonable care, not perfect knowledge. You cannot misrepresent something you do not know.
- Underwriters deal with unknown family history routinely. Some treat it neutrally, some a shade more cautiously, and approaches differ between insurers — which is a reason to compare.
- Your own health, measurements and lifestyle carry far more weight than a family-history blank, and those you can answer in full.
- Adopted adults can sometimes obtain birth records and health information, but it is often incomplete, and there is no requirement to get it before applying.
The short answer: "not known" is a complete answer
Say plainly on the form that you were adopted and that your birth-family medical history is not known. That is accurate, it is what underwriters expect to see in your situation, and it is not a red flag. It is simply a true statement about the limits of your knowledge, and the whole design of a modern insurance application is built around what a reasonable applicant actually knows, not around an ideal applicant who knows everything.
The mistake to avoid runs in the other direction. Do not guess, and do not invent a reassuring history to fill the space. Writing "none" or "no family history of anything" when you genuinely have no idea is not honest, and if it were ever relevant to a claim it would be the wrong kind of inaccuracy. "Not known" protects you precisely because it is true. A guess dressed up as fact does not.
What the family-history question is actually measuring
Insurers ask about close relatives because certain conditions cluster in families, and a pattern among parents and siblings can be a rough proxy for inherited risk. What an underwriter is really scanning for is a striking signal: a first-degree relative — a parent, brother or sister — affected by a serious heritable condition at a notably young age, or two relatives affected by the same thing. A single grandparent who had a heart attack in their eighties tells them very little; two parents with the same cancer before sixty tells them more.
The point of understanding this is that the family-history question is a blunt instrument standing in for something the insurer cannot observe directly. It is one input among many, and for most conditions it is a weaker predictor than the applicant's own measurements and habits. Where a specific condition does genuinely run in a family and is known, that detail can matter — the way it does for someone who knows that bowel cancer runs in their family — but a total blank is not the same as a red flag. It is an absence of information, and insurers have a settled way of pricing an absence.
What the law requires: reasonable care, not perfect knowledge
The standard is set by the Consumer Insurance (Disclosure and Representations) Act 2012. It replaced an older, harsher regime in which an applicant could be caught out by failing to volunteer something they were never asked about. Under the 2012 Act you have a duty to take reasonable care not to make a misrepresentation when you answer the questions the insurer puts to you. Reasonable care is judged against what a reasonable consumer in your position would have known and how clearly the question was asked.
Read that against an adopted person's situation and it resolves easily. You cannot misrepresent a family history you have never had access to. Recording that the information is not known because you were adopted is the opposite of a misrepresentation — it is an accurate account of your knowledge. There is no version of "reasonable care" that requires you to know facts about strangers you have never met.
This matters because the fear underneath a lot of these searches is that a blank could later be used to refuse a claim. It cannot, where the blank is honest. A claim can be affected by an inaccurate answer that made a difference to the terms, but "not known" is not an inaccurate answer; it is a true one. The general rules on when a family-history answer can and cannot affect a claim are worth knowing, but the headline for an adopted applicant is that honesty about the gap is your protection.
How an underwriter handles the gap
Underwriters see unknown family history constantly — from adopted people, from those estranged from their birth families, from anyone whose parents died before a diagnosis could be recorded — and they have routine ways of dealing with it. Broadly, some insurers price an honest blank neutrally, effectively setting the family-history factor to one side and assessing you on everything else. Others treat unknown history a shade more cautiously as a matter of policy. Neither approach is universal, and the differences between companies are real.
That variation is the single most useful thing to take from this page, because it is actionable. Two insurers can take the same "not known" and reach different decisions, so the answer to a cautious response from one is not to give up but to compare. This is exactly the kind of case where using an FCA-authorised broker to get life insurance quotes across the market earns its keep, because a broker can steer an application with an unknown family history towards insurers whose underwriting handles it more generously.
It also helps to keep the weight of the missing piece in proportion. Family history is rarely the deciding factor for an otherwise healthy applicant, and the popular belief that dying young is simply inherited is far stronger than the evidence supports — a point worth reading in full if it is really the fear behind the form, in the piece on what it means when both parents died before 60. A blank on one input is not the drama it can feel like at the moment you hit it.
What you can answer in full — and why it counts for more
Here is the reassuring counterweight to the gap. Everything the underwriter cares about most, you can answer completely. Your height and weight, your blood pressure if you know it, whether you smoke, how much you drink, your job, your current conditions and any medication — these are the factors that move a decision, and none of them depends on knowing your birth parents. A full, careful, honest picture of your own health does more work than a family history ever would.
It is also worth separating a family-history blank from a genetic-test result, because people sometimes conflate them. A predictive genetic test result cannot be asked for by a UK insurer at all, and if curiosity about your origins ever led you to a consumer DNA kit, that is a different subject with its own protections — for instance an APOE result on an ancestry report and UK life cover. Not knowing your family history and choosing to test your own DNA are two separate things, and neither obliges you to hand an insurer anything the rules keep off the form.
If you happen to be part-way through your own medical investigation while applying — waiting on a scan or a blood test for a symptom of your own — that is a genuinely different question from an unknown family history, and it has its own rules about what must be said, set out in the guide to applying for cover while you wait for test results. Family-history unknown and personal-tests-pending are not the same situation, and it is worth not muddling them.
Can you find out your birth family's medical history?
Sometimes, and it is entirely your choice whether to try. An adopted adult in England and Wales has the right to apply for a copy of their original birth certificate and can use intermediary services and the Adoption Contact Register to trace birth relatives; the agency that arranged the adoption may also hold health information recorded at the time. The starting point for the paperwork is the government's guidance on accessing adoption records.
Two honest caveats come with that. First, what exists is often thin. Health information recorded decades ago at the point of an adoption may amount to very little, and tracing a birth relative does not guarantee they will share, or even know, their medical history. Second, and more importantly for the form in front of you, there is no obligation to obtain any of it before applying for cover. You are allowed to apply now, answer "not known," and pursue your records later if you choose to, for your own reasons rather than the insurer's.
If you do trace relatives and learn something specific and serious, you would answer honestly on any future application — but that is a bridge to cross only if and when you reach it. It is not a precondition for getting insured today.
Scotland and Northern Ireland
The insurance position is the same across the United Kingdom: "not known" is an honest answer everywhere, and the reasonable-care standard of the 2012 Act applies UK-wide. What differs between the nations is the machinery for accessing your own origins. In Scotland, adopted people have long had the right to access their original birth record from the age of sixteen, earlier than the age of eighteen that applies in England and Wales, and a dedicated service maintains the adoption contact register there.
In Northern Ireland the arrangements differ again, with access to adoption information handled through its own regional service and guidance available from nidirect. None of these differences changes what you write on an insurance form. Wherever in the UK you live, an unknown birth-family history is an accepted answer, and the route to obtaining records — where you want them — is a separate matter from getting cover in place.
Frequently asked questions
What do I put on an insurance form if I was adopted and know nothing?
Answer honestly that the information is not known. The Consumer Insurance (Disclosure and Representations) Act 2012 requires reasonable care not to make a misrepresentation, not perfect knowledge. Writing that you were adopted and that the family history is unknown is accurate, and underwriters expect to see it.
Will not known count against me?
Insurers deal with it routinely. Some price a blank neutrally, some treat unknown history a shade more cautiously, and approaches differ between companies, which is a good reason to compare. What matters far more is your own health, measurements and lifestyle, which you can answer in full.
Can I find out my birth family's medical history?
Sometimes. Adopted adults in England and Wales can apply for their original birth record and use intermediary services, and adoption agencies may hold health information recorded at the time. It is often incomplete, and there is no obligation to obtain it before applying for cover.