•An insurance contract is legally binding only if the insured has an interest in the subject matter of the insurance and this interest is in factinsurable ,in most instance, an insurable interest exists only if the insured suffer a financial loss in the event of damage to, or destruction of  ,the subject matter of the insurance

•保险人或被保险人的这种经济利益，可因保险事故的发生而受到损失；也可因不发生保险事故而继续享有。

•投保人或被保险人必须对保险标的拥有可保利益；投保人或被保险人对保险标的不拥有可保利益的，保险合同是无效合同或不得向保险人请求赔偿保险金。

•保险利益必须是合法的、可以用货币计算的、可以确定和实现的利益。

The issue is muddied byseveral factors：

•Foreign exchange exposure(CIF,CIP)

•Trust

•Insufficient coverage