"Taking the US as an example: there's a "tourism" visa, and there's a "business", which includes attending conferences. " No one will check you visa at the con

"Taking the US as an example: there's a "tourism" visa, and there's a "business", which includes attending conferences. " No one will check you visa at the conference. So, while not lying about it, there is no reason to be open about it either since you will never get "caught".