Ingy used to have a blog post about all the different hassles he had with different people coping badly with the ö (passport, driving licence, Amazon account et

Ingy used to have a blog post about all the different hassles he had with different people coping badly with the ö (passport, driving licence, Amazon account etc). He's killed his blog at least twice since then though, so I don't think it's currently available and I can't find it in archive.org I don't know about the US, but I made a series of Freedom of Information requests in the UK to find the answer to exactly this issue there, and was somewhat surprised to find that (in Northern Ireland at least) supposedly any Unicode character is valid: http://nothing.tmtm.com/2008/11/irene-and-irene-and-%D0%B0%D0%BD%D1%8F-and-%E5%AE%89%E5%A8%9C/ http://nothing.tmtm.com/2008/11/irene-and-irene-and-%D0%B0%D... Whether that extends to the snowman character and the like is still an open question...