I'm filling out my application for an open work permit. So far everything is pretty straightforward but I had a couple of questions. My wife is already working in Canada temporarily with a working holiday visa as a chef. On the online application, under optional documents, I can upload a "Letter of Explanation." Should I write a letter of explanation? All I need to say is that my wife is working in Canada with a working holiday visa, and I wish to be with her. Currently we are applying for a green card in the US, which has taken quite some time, and it's expected it will take even more time. Not sure if that's worth mentioning. It might help explain why she is in Canada right now and not with me in the US.