Originally Posted by WorldLux

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


Source:https://ec.europa.eu/taxation_custom...velling-air_en