Originally Posted by
Palal
If you do not leave the airport in LIS, you will not go through customs, just border control.
That's wrong. When entering Schengen while transiting, you'll be have to declare anything you carry with you.
OP would have to declare at LIS anything in his carry-on that needs to be declared and the rest in his checked bags when arriving. There's thus TWO customs checks (even if the first one isn't carried out as systematically as the second one).
Here's an example
Are you taking a flight between a non-EU airport and an EU airport with a change of plane in another EU airport? (e.g. Tokyo - Copenhagen - Amsterdam with a change of aircraft in Copenhagen)
You will get off the first plane in Copenhagen where your hand baggage is liable to be checked by customs. Meanwhile, your registered baggage, which will have been given a normal label (no green edges) in Tokyo, will be transferred from the baggage hold of the first plane to that of the second).
On arrival in Amsterdam , your hand baggage will not, in theory, be liable to be checked by customs (Note 2), whereas your registered baggage may be.
If the second EU airport is not equipped for air traffic with third countries (See, for information, the list of international Community airports), your registered baggage will be liable to be checked in the first EU airport.
Source:
https://ec.europa.eu/taxation_custom...velling-air_en