This scheme is called "phishing" in the internet world, and it is indeed a big problem. I get them all the time as well, and because I have PayPal, I get the same thing from them. The latter's a bit of a laugh, though, because I get the PP phishing mails to my SUNRAY email address, whereas at PayPal I use my Sympatico address
If you do business on the web, anything from buying/selling to web banking, be advised that those companies will NEVER request your personal information from you by email. Do not even be tempted to answer, even those harmless-looking emails asking to confirm your email address (spammer heaven to have a confirmed address), much less those looking to confirm your 10-digit grid coordinates and commo code on this crazy planet.