Does anyone know what happens if you do a group(ed) esta and 3 out of 4 of the party now have new passports so require new esta's. Can the 4th person still travel on the old esta or should they also get new one. If we have to do a new esta for my eldest dd it will be to her new address so she will then need different insurance (insurance company said fine to travel on our family one until as long as esta and customs forms still have her at our address too). This is a biggy for us as she has complex medical issues and we are tying to get to 1 year since last hospital admission before she tries to get her own insurance. Any advice?