If you have lost your resident card in France, you must contact your sub-prefecture or prefecture or the Préfecture de Police for Paris. If you are abroad, you must apply for a return visa to the French Embassy or Consulate. An investigation, sometimes long, is then carried out. Once back, you must go to the sub-prefecture or prefecture (Prefecture of Police for Paris). You will find all the information related to this subject by clicking on the following link:
Loss of residence card .