I was going through my Quicken last weekend and noticed that I have an certificate of deposit account with no activity in almost two years. The balance is VERY large. I called the bank and they say that they issued me a cashiers check back then. I can't deny that possibility, but I don't show the withdrawl in my books and I don't show a deposit of that magnitude for then or the month after that. I'm wondering if I put it in a new account somewhere and forgot to document it. I've looked at my "free credit report" and that doesn't seem to show deposit accounts. How can I do an search for all accounts in the US that list my social security number?

You cant. Only authorized agents of the government can do that. If you had deposited it somewhere then you should be receiving statements on it from someone.

You can ask the bank for a copy of the check which should show where it was deposited.