My spouse wants to provide some sort of paperwork that would make us financially responsible for his older brother who is trying to get a student visa to Canada. I am a citizen of the US, spouse is a resident. I do not want to be financially responsible for him, but I also know that I can't seem to find all the information I need. What kind of information would we have to provide? What kind of paperwork would we have to sign? We are living paycheck to paycheck, and the idea of being financially responsible for his brother is freaking me out.