What do you call a confusing license plate number? [closed]

Solution 1:

You could say it is "obfuscated", which means "made confusing, hard to read or understand".

https://www.merriam-webster.com/dictionary/obfuscate

That applies here, in particular, because these people will have not been randomly allocated these number plates - they have gone out of their way to choose hard-to-read numberplates, presumably because they take some sort of exception to the idea of being identifiable via their license plates, and so have chosen plates which are hard to remember, or easy to make mistakes when reading.

Solution 2:

ambiguous (MWD)

1 a :doubtful or uncertain especially from obscurity or indistinctness eyes of an ambiguous color b :inexplicable

2 :capable of being understood in two or more possible senses or ways an ambiguous smile an ambiguous term a deliberately ambiguous reply