Entry requirements change, and nobody tells you

Comparisons of entry requirements usually pick a winner. This one picks the circumstances, which is more useful.

Three variables, not one

What you need to enter a country depends on the passport you hold, where you are travelling from, how long you are staying and what you will do there. Two people on the same flight can face completely different requirements, which is why advice from a fellow traveller is unreliable. Purpose matters more than people expect: work, study, journalism and volunteering frequently need permissions that tourism does not.

Answering all three questions for yourself specifically is the only approach that works.

Where to look

The destination country's own immigration or foreign ministry site is the authoritative source, and your own government's travel advice pages are a useful second. Airline document checkers reflect what the carrier will accept at check-in, which is the practical test you must pass.

In practice, commercial visa sites often mirror official processes at a markup and are sometimes months out of date. Where an official process exists online, use the official domain rather than the first search result.

Electronic authorisations are proliferating

Many countries now require an online authorisation before travel even where no visa is needed, processed in advance rather than on arrival. These are typically tied to your passport number, which means renewing your passport can invalidate an existing authorisation.

Nine times in ten, approval is usually quick but not instantaneous, and applications are occasionally referred for manual review. Apply as soon as the trip is confirmed rather than the night before, since the failure mode is being refused boarding.

Transit counts

Changing planes in a country can require a transit visa or authorisation depending on your nationality, the airport and whether you clear immigration. Some airports require entry to change terminals, which converts a transit into an entry. A cheap itinerary via a third country can therefore carry a documentary requirement that the direct flight does not.

Check the transit rules for each connection point before booking, not after.

Health and other declarations

Some destinations require vaccination certificates, and the requirement can depend on the countries you have recently visited rather than your origin alone. Health declarations, customs forms and arrival cards are increasingly digital and sometimes must be submitted within a window before arrival.

From the queue, for anything medical, a travel health clinic or your own doctor is the right source, and some vaccinations need to be given well in advance. These requirements changed rapidly in recent years and continue to, so recency of information matters more than usual.

Border and customs rules are national and are the ones worth double-checking.

Build a habit around it

Check requirements when you book, and check again a week or two before departure, since the gap between the two is where changes land. Save a dated screenshot or copy of the official page, which is useful if a check-in agent disagrees.

At the airport, note any application processing times and work backwards, particularly for visas requiring an appointment or the surrender of your passport. Assume nothing carries over from a previous trip, because the rules for your nationality may have changed since.

Side by side

The takeaway

Check the official source for your own passport when you book, and again shortly before you go.

Pack for the trip you are actually taking, not the one in the photographs.