I've sold my P3S after getting the Mavic and was trying to help the fella get started with his Phantom. I know that he should register it in his name with DJI and the FAA but I couldn't locate anything in a quick search on Google and didn't see any topics about it when I searched this forum. And, nothing seems to be posted on DJI site. So, does anyone have experience registering a used drone with DJI and the FAA. I'm in the process of contacting DJI through email but I need to put the SN in the correspondence and I can't get a hold of the new owner so I was hoping someone from here would know offhand what to do until I can get the SN number. I'll check on the FAA site for info about registering used drones also but if someone has info about that, I'd also appreciate it. Thanks.