All events concerning the civil register should be covered by an act drawn up in line with very precise rules, in a special format, by a person invested with the functions of civil registrar.
Each municipality has its own registry service. The mayor is the legal civil registrar.
The registrar must record all events which occur in his municipality (births, deaths, marriages).
In addition, certain events taking place elsewhere or recorded elsewhere in authentic acts or judgements should be transcribed into the municipal register (recording of any death certificate issued elsewhere concerning a person resident in the municipality, recording of acts of adoption) or mentioned in the margins of acts drawn up in the municipality (for example, the birth and marriage certificates of both parties should be mentioned in the margin of any divorce act).
The civil register has existed since the French Revolution. Some data has been available since 1901.