Abstract: A closure device for a vehicle tank filler neck (1), which has an opening (3) provided with a flap (5) for the entry of the filling tube (4) of a fuel pump nozzle, wherein the flap (5) can be prestressed against the lower edge of the opening (3) by means of a spring (6), and an additional load in the closing direction can be placed on the flap (5) with the aid of an actuation device (11), wherein the actuation device (11) furthermore controls a selector valve (19) which, when the flap (5) is in the non-loaded position, connects the filler neck (1) below the flap (5) with a first recovery line (30) leading to the fuel vapor recovery container, but in the position where the flap (5) is under a load connects a pressure equalization line (25) connected to the vehicle tank with a second recovery line (24) of a narrower flow cross section leading to the recovery container and equipped with a roll-over valve.