Don't send bank, credit card, utility, or any other billing information to people who ask for it via email.Email addresses are easily forged, and links can be displayed that look legitimate, but aren't. A new tactic of these miscreants is providing a fax number to fax information to. Guess what? Fax numbers provide even less accountability than an email address or url, which are more quickly identified as invalid.
Just don't do it.