During world war II the swiss national bank took all of the gold looted by the nazis - these were astronomical sums, it's really a shameful chapter of their history which is not widely known.
In addition to turning back Jewish refugees at the border. Also the swiss government even requested the nazis to mark the passports of Jews, so that they could be better turned down at the border.
https://www.yadvashem.org/odot_pdf/microsoft%20word%20-%2060...
Also there was a big court case during the nineties, because credit suisse withheld the money of holocaust victims, while at the same time former nazi officials had no problems with their accounts - all at the same bank.
https://en.wikipedia.org/wiki/World_Jewish_Congress_lawsuit_...
https://www.ft.com/content/f80088e4-5f0d-11ea-8033-fa40a0d65...