Article 2421 of the French Civil Code
Legal, judicial or contractual mortgages shall be registered with the service responsible for land registration of the location of the property, subject to the exception provided for in the second paragraph of Article 2418. Registration, which is never made ex officio by this service, may only take place for a specific sum and on specific immovables, under the conditions set by article 2423. In any event, the properties on which…