According to this site, Mislaid Cash, Checks, Deposits, Securities, Refunds, and More can be claimed from State and Federal Treasuries.
Several years ago I found $700 for a rich guy using various sites and links. Us poor ones didn't find a dime waiting for us. The rich guy didn't get around to paying me. The poor ones did.
If you find some money owned you, use it all for archival fees!