Generally, no passport and identity checks are carried out within the Schengen area. However, member states of this agreement can make exceptions to this rule at any time, such as in the face of a threat.
At the moment, the Schengen area covers 26 European countries, 22 of which are part of the European Union. You must always keep personal identity documents on your person and show these upon request.
For arriving passengers:
If you arrive in Berlin from outside Europe or from non-Schengen countries then your travel documentation will be monitored by the German Federal Police at passport control. Please keep your valid travel documentation ready.
For airports in Germany, there may be separate counters for travellers from EU states as well as Iceland, Liechtenstein, Norway and Switzerland as well as travellers from outside the Schengen area for the purpose of speeding up arrivals.
Before starting your journey, please check that your travel documentation is still valid. The passport or identity card must be valid for at least the duration of the journey abroad, whilst many countries have additional requirements. Please ensure that you are aware of the regulations in the destination country and the security situation.
As well as valid travel documentation, many countries (depending on destination: passport or ID card) also request an entry visa. If you do not come from a country within the Schengen area, then you should also check whether you also require a visa for your destination even if travelling within the Schengen area.
The consulate or diplomatic mission of the target country is responsible for issuing a visa. Please note that as the passenger, you are responsible for observing regulations and that non-compliance may result in travel being rejected.
If you have lost or forgotten your passport, you can contact the German Federal Police at the airport.