[drfuchs]

But they left S, X, and Z rotationally symmetric, so if you choose a non-palindrome vanity plate with only those characters, you can mount it upside-down and fool plate-readers.

[askl]

But at least in Germany the plates always start with some letters and end in numbers. So mounting it upside down can't result in a valid plate.

[inanutshellus]

Custom ("vanity") plates aren't allowed in Germany?