Originally Posted by
NA-Flyer
Not just Switzerland but also he has a German schengen visa prior to the Swiss one on the same passport and he used it many times
It's irrelevant. He needs both a valid passport and a visa. He has the visa, but not the passport. He lacks the passport because it is unsigned and thus he was denied boarding. Properly.
The political discourse is as inappropriate for this forum as it is for the LH ground personnel and contractors.