If you go from Paris to Warsaw, you still won't need a passport, just a basic ID
Schengen area
travelling around Europe as European is not much more hassle than moving on the US from one state to the other.
Schengen area
travelling around Europe as European is not much more hassle than moving on the US from one state to the other.
You are required to have a passport (or id) with you (as in, that’s what the law says). Even in your own country. But in your own country a drivers license is usually also sufficient.
But in practice you will almost never be asked to show any of those. In your own country, nor abroad.
https://en.wikipedia.org/wiki/Template:Supranational_Europea...
https://en.wikipedia.org/wiki/Schengen_Area
https://en.wikipedia.org/wiki/European_Union
https://en.wikipedia.org/wiki/Eurozone
Ireland and Cyprus are in EU & Eurozone but not Schengen; Poland, Hungary (and more) are in EU & Schengen but not Eurozone; Switzerland is in Schengen but neither EU nor Eurozone; Montenegro and Kosovo are in the Eurozone but neither the EU nor Schengen.