Hi there. There are basic things that work without issue, such as [b]( ) _-[/b] , but there is no official list of supported characters or guarantee that a particular punctuation will work as expected. We've seen apostrophes and commas work in many cases, but turn into codes in others. It's possible that happens due to some particular combinations with letters/numbers immediately before or after punctuation without spaces, though again, there's no list. To your specific punctuations question, I've not personally seen anyone recently with a ? or ! in their name, but that doesn't mean they won't work. I would recommend to take your time and look at other players' names for what punctuations have worked or the safest option is to avoid using punctuations altogether.