What They Check, Who Gets Stopped, and What Happens If You Don’t Have Papers Short answer: Yes — you must carry documents. And yes — checks really happen in 2026. Germany has officially reintroduced internal border controls with Poland. Это означает: документальные проверки в поездах, автобусах, на дорогах и даже на пешеходных переходах. Do You Need Documents on the Germany–Poland Train in 2026? Do they check documents on trains? Yes. Regularly. Border police (Bundespolizei