SecondAttempt
Thinks s/he gets paid by the post
This happened with my wife's sister in law a couple of years back. No idea really who the long lost relative was and by the time the estate was settled, all the discovered heirs informed and the search company's cut taken they all received about £4k.
There is a popular BBC TV show on how all this happens that my wife has watched in the past. It's 12 series long now.
I expect there are similar companies in the USA who search to find heirs to estates that would otherwise end up in the coffers of Uncle Sam.
https://en.wikipedia.org/wiki/Heir_Hunters
My ex-wife inherited about $80k from an aunt who had only met her once when she was about 4 years old. The family had very few kids for a few generations somy wife and her sister were some of the nearest heirs and were named in the will.
So...it happens. But I would be cautious until the money is in the bank.