The guy who called me said "I can send you an email to show it's official" and I thought of that immediately when I read this article. No dice, he refused to give me a number to call back on, so I knew it was fake.
EDIT You can spoof from email addresses and you can spoof phone numbers - if someone is calling from a legit number on caller id it means NOTHING. You have to call back to a legit number to be sure it's real.