Certificate of conformity must precede occupation?

this legal obligation only concerns owners who want to sell their home.
For renting, your landlord has only to show you the PEB
Certficat de Performance Energétique).

You post so many questions on this forum about your new rental contract!!

Just hire a relocation agency if your employer can'y afford that for you?

Your concierge?!? She is fully incompentent!