My SO travels often to Europe so she has two EMV/chip + PIN credit cards: US Bank and Penfed. She has been able to use them without problem in most situations EXCEPT the German U-Bahn automatic kiosks always reject both cards. Her German friends have no problem on the same machine with their credit cards.

Anybody know why the EMV cards fail on the U-Bahn? Has anybody successfully used a US issued EMV card in the U-Bahn kiosks?