I had a previous marriage in US and was prompt to go back to Philippines after we separated. My children at the time were only 6, 4, and 2 I have not seen them until I found them in social accounts in the internet 2 years ago. I am now in the process of applying for permanent residency in Canada, but my worry is that my ex wife is not cooperating with the papers I will need, such as my eldest son who is now 19 who needs to sign a family information and them to have medical examination as well, they just won't cooperate and doesn't want to do anything about it which I totally understand. But how can I proceed with my application please advise.