Originally Posted by cocoblush
But the authorities and just get your bio-metric passport to see if you have spent the required time in the country, right?
Monaco is part of France and such of Europe. There are no passport checks in Europe or on flights within Europe so there is no way to prove or disprove where somebody has been living. it's basically impossible to track down EU citizens, especially if they are rich and have enough money at their disposal to go where they want and stay as long as they want.
With that being said, Twitter and Facebook make this sort of stuff a bit more complicated