Are Those "Unclaimed Money" Sites Really Legit?

According to one online article:

"Yes, such businesses are legal, and in many cases the claimed windfall does exist. But consumers can easily find and recover such funds on their own, free of charge.

When the rightful owners can't be found, employers, banks, pension administrators, insurance companies, etc. are required by law to turn over unclaimed property to the state.

For example in California there is currently over $5 Billion Dollars that belongs to people!