Article 259-3 of the French Civil Code
The spouses must communicate with each other and with the judge, as well as with the experts and other persons designated by the judge pursuant to 9° and 10° of Article 255, all information and documents useful for determining benefits and pensions and liquidating the matrimonial property regime. The judge may make any useful enquiries of debtors or those who hold assets on behalf of the spouses without professional secrecy…