I have received emails from banks and I just deleted them because I don't have accounts there.
I used to receive petitions from Nigerians almost daily to help them invest large amount of money in US banks. I put some of them on the 'avoid' list.
I received one email last month saying that I had won some kind of a lottery and was entitled to $650,000 (US dollars). I was asked to send my mailing address to receive it. When I sent the address, the emailer requested either a passport number or a drivers license to 'verify' my identity. At that point I became alert and did not send that information. If I missed $650,000 by doing that, so be it.
Vash