The whole site is an amusing and satisfying read, mostly because it's reassuring to know I'm not the only person who is really bothered by these kind of little UI niggles.

I particularly love the one where a German insurance provider insists on ignoring the point of the 'I' in 'IBAN': https://annoying.technology/posts/8b0e0f1083d21073/

[For non-europeans: the first two characters of an International Bank Account Number are the ones that identify the country; if they really wanted to insist that only Germany-registered bank accounts are allowed, there are more intuitive ways to validate that.]