We applied for my stepson to come over back in 2015. At this point, the preferences are for May 1, 2012. The question is this: If my stepson was in a third country (neither USA nor China) at the time his preference comes up, how can we make sure he is not missed? How does the USCIS notify him? Does it notify us, then assumes we will notify him? Or does the USCIS try to directly contact him according to the information we put into that I-130 four years ago? We have no idea if those addresses in China will still be valid at that point. Thank you