I recently provided my Brazilian boyfriend with my passport information and signed a letter of invitation so that he could apply for a visitor's visa to come see me. However, I have discovered that I do not know him as well as I thought I did (or his secret Brazilian girlfriend) and would like to revoke my invitation. I am unsure whether or not he has sent the invitation in to be processed. Also, if he does come, in what capacity am I legally responsible for him? I want to protect myself from any problems in the future if he decides to "use me" to visit Canada.