Whether you go through passport control depends on whether you are traveling within the Schengen Area. The Schengen Area is a zone of 29 European countries that have officially abolished all passport and all other types of border control at their mutual borders. If you are flying from Paris to Rome, or driving from Germany to Austria, there is no passport control. You simply walk off the plane like a domestic flight. However, if you are traveling to or from a non-Schengen country, such as the UK, Ireland, or Cyprus, you must go through full passport control, even if you are an EU citizen. It is important not to confuse the European Union (EU) with the Schengen Area; for example, Ireland is in the EU but not in Schengen. Additionally, in 2026, some countries may have "temporary" border checks due to security concerns, so you should always carry your passport or national ID card, as you are still required to prove your identity if stopped by local police.