Article L172-2 of the French Insurance Code
Any omission or misrepresentation by the insured which materially diminishes the insurer’s opinion of the risk, whether or not it has affected the damage or loss of the insured object, shall cancel the insurance at the insurer’s request. However, if the insured proves his good faith, the insurer is, unless otherwise stipulated, liable for the risk in proportion to the premium collected compared to the premium he should have collected,…