noun
mental reservation; false declaration of intent
Legal term for knowingly declaring an intention that differs from one's true will, typically to deceive the other party. Used in contract law contexts.
心裡留保による意思表示は、原則として無効とはならない。
A declaration of intent made with mental reservation is not void in principle.
相手方が心裡留保を知っていた場合、その意思表示は無効となる。
If the other party knew of the mental reservation, the declaration of intent becomes void.