My wife -- a frequent eBay user -- has gotten literally dozens of the "eBay" requests for her to confirm her username/password, other "her account will be terminated" or some such nonsense.
Fortunately, she is not gullible ( I've managed to convey a certain amount of cyber-cynicism

).
These emails are
REALLY well done, and look like the real deal, including links to (certain) legitimate eBay pages.
She forwards them to a security section of eBay (don't recall exactly where) and then eBay pursues. I've looked at the email header info, and most of these are from a European server source.
Another thing I've seen people get are e-mails -- purportedly from Microsoft -- telling the recipient to run an attached (executable) file for some "security issue."
Again, the uninfomed/ill-informed would likely do so (the letters are well done, and look like they are from M$!)... but Microsoft
NEVER sends users any sort of patch/upgrade as an attachment. You need to go to the MS Update site.