This is unclaimed property, in this case money that is yours but never got to you because you moved or the check was never cashed,
if it has your name on it, the state(s) will take it by law and hold onto it until you claim it or the time limit expires.
If you have moved check the official state websites, some states use a third party service provider for this.
I would run my family members on the NY site where they lived, found my dad had two listings.
He dismissed my suggestion to file the claim, believed it to be a scam. My sister talked him into mailing in the form.
Turns out he had money from the insurance company Met Life, that converted to a stock based company from mutual company,
the money was cash equal of the shares he was issued after the conversion, all policy holders received this stock in various amounts.
He got two checks, one for $8,000 and a second for $5,000 (approx). Sis says you should give James some of it for finding it for you,
dad says 'No I'm putting it in the bank'.
No worries about that.