Kim Komando has shared a site where you can find your money as a first step to claiming it. She fills us in: "Money becomes unclaimed for a variety of reasons. Unclaimed property includes savings or checking accounts, stocks, uncashed dividends or payroll checks, refunds, traveler's checks, trust distributions, unredeemed money orders or gift certificates (in some states), insurance payments or refunds and life insurance policies, annuities, certificates of deposit, customer overpayments, utility security deposits, mineral royalty payments, and contents of safe deposit boxes."
Follow the claiming methods in your state. Good luck!