Originally Posted by
AirportPlanner1
You never get asked about visas when booking and you don’t even hand it to the airline until you’re at the airport or gate, unless explicitly required in advance. So valid reason for travel is the same principle, like a visa if you don’t have it tough luck. Wizz keep the money anyway, it’s the passengers problem not theirs.
Unless the rules have changed, that's not entirely accurate. If a passenger is required to have a visa to enter a country and doesn't, the carrier who brought them will be required to remove them, will likely be fined for the contravention and any costs incurred whilst the individual is held. May vary on a country by country basis but always used to be the case.