insurable interest
Insurable interest means you must actually stand to lose something before you can insure it, which is what stops insurance becoming gambling.
In plain English
You cannot insure your neighbour's car. The insurer is not being difficult. You would simply then have a financial reason to hope something happened to it.
Insurable interest is the rule that you must genuinely stand to suffer a loss before you are allowed to insure against it. You can insure your own house, your own life, your own vehicle, your own goods in transit. You can insure a business partner whose death would damage your company. You cannot insure a stranger's property and wait.
It is the line between insurance and gambling, and it is the reason the whole system works at all. Without it, insurance would create the very disasters it exists to cover.
It matters practically more often than people expect. If you insure a property that is not legally yours, the policy may be void when you claim. If you insure goods you had already sold, you may have no interest in them any more.
The question to ask before buying any policy is simple. If this thing were destroyed tomorrow, would I be worse off? If the honest answer is no, you should not be insuring it, and the insurer will find that out at exactly the wrong moment.
You insure a vehicle registered in your brother's name. It is stolen. The insurer refuses, because you did not legally own it and so did not stand to lose it. You paid premiums for two years for a policy that was void from the day you signed it.
Questions people ask
Can I insure something I do not own?
Generally not, unless you have a genuine financial interest in it, such as a lender's interest in property secured against a loan.
When must insurable interest exist?
It varies by type of policy. For property it generally must exist at the time of the loss. For life cover it is usually required when the policy is taken out.
Can I insure a business partner?
Yes, where their death would genuinely harm the business financially. That is exactly what key person insurance is for.
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