How should I sign myself on poster if I am a student?
I suspect that any of them would be fine. Instead of an institution, it is also acceptable to describe yourself as &quot;Independent Researcher&quot; or the equivalent, depending on the venue. But listing the university could be taken as identification only.
There is an exception, of course. If you are doing something that the university would object to for some reason, then it is better not to name them unless you clarify, somehow, that you aren't suggesting they authorize or subscribe to what you have done. But even then, &quot;Student at Moo U.&quot; is an accurate portrayal.