My spouse and I just received the next step in permanent residency process, the background check and police certificate, my spouse has two adult children in the US both of whom have jobs etc and schooling and living on their own, are the required to also do a background check and police certificate even if they won't be moving up here, as they have their own lives etc? This makes no sense in the application. (if applicable) it says for the background check. I cannot get a steady answer. This seems like such a hassle.