This probably has been done before, but it never hurts to check back once in a while and see if The Man is holding your money. The following site provides links to state government databases of lost unclaimed property: http://www.unclaimed.org/mainframe.asp?VisitorType=owner (click on "find property" on the left side column). I found that a city owes my dad $100 for overpaying electricity bills back in the 90s. I can't believe my dad kept telling me to turn off the lights all the time when I was a kid and it turns out he pays the electric bill like he was Donald Trump.