Hey guys, I just received my ITA 2 days ago woohoo. While filling out the forms, I came to a point where they require me to provide the details of members of my family (names and Dates of birth). I have no problem providing the info for my immediate family members (mom, dad & full siblings). However, they are also requiring names of half siblings as well. My dad in his youthful days was quite the playboy and as a result, he had a few children before meeting my mom. I know 1 or 2 of them but I also know there are more out there and it will almost be impossible to find out their names & birthdays. Can I just give the names I know and say that these are not all of my family members? I'm concerned