CF,
Thanks for clarifying the French rules.
It's probably worth pointing out that this is different to the UK system. According to the
CAA Safety Sense leaflet on VFR flight plans:
If the parent ATSU fails to hear anything, it will assume that the flight landed safely i.e. NO NEWS IS GOOD NEWS and no further action is required.
Hence, in the UK, if you are landing at an airfield without an ATSU, it is vital to have what the CAA call a "responsible person" who is aware of your ETA, and can call the parent ATSU and have them initiate overdue action if you don't contact them.
FFF
-------------