Fuel smell

Greetings, Forum People:

I have a Renault Clio Mod 1999 Union injection 1.6cc, which every time I take charge/gasoline, releases a lot of fuel smell when it is stopped.
It happens when the load exceeds 3/4 parts of the tank. I worry, since the garage is inside my house, and when this occurs, the smell is really unbearable (and even I think dangerous). I threw myself under the car, but I don't see obvious losses. What can be?

Of course, thank you very much.

Look if the tank vent is stuck and air enters when the fuel is spent. Luck....