Originally Posted by
LondonElite
Indeed. All of the major rental companies I can think of don't allow cars to be taken to Poland, since there is significant concern (justified) that these cars will never make it back.
This is fortunately utterly nonsense. Hertz eg only prohibits you from taking BMW and Mercedes and certain top models into Poland, Sixt and National add Audi and VW to the list. The problem however are one way rentals. They are either not possible or carry a substantial surcharge.