I know it's man made rather than natural, but I keep reading media coverage of the many people trying to help parents locate their children after separation :
'"What we’re finding is that there is no mechanism, no policy, for communicating or even finding the parents once the child has been separated,” said Megan McKenna, Kind’s senior director of communications and community engagement.
'McKenna said when parents and children were separated, they each got individual case numbers that their mother, father, daughter or son did not have access to.
'On the chance that these numbers would be sequential, Kind advocates started putting educated guesses into the case tracking system in the hopes it would lead them to parents they were seeking.
'“You just play around: maybe the child’s number ends in five, so the adult’s number could end in six,” McKenna said. “So you put that in the system and see if you get a hit. Or it could be the other way around." That tactic has worked in some instances, but not often enough to be a solution.'
It seems as though person finder would be an incredibly useful tool, helping reunite families.