Some airlines might occasionally check your documents regarding a valid visa for the country you wish to enter. Please keep in mind that the airlines are responsible for the transport of the passenger in case the entry to the next country is denied. Therefore the airlines might require proof of the duration of your stay and onward travel. You might have to present a return ticket, an onward ticket or (if you are lucky) only a hotel reservation. If you are not able to show such documentation the airline has the right to deny the boarding. 12Go encourages customers to check all visa and airline's requirements before they book an international route.