If you go to the Ebay site and poke around in the fraud section, there's a great section on how to tell if the link you get is really from Ebay to begin with.

Many have been getting these fake emails from what seems to be Ebay asking to update their account information or risk having your account shut down. They are fake emails designed to mirror the Ebay home page with the official looking Ebay logo also which unknowingly redirect your information input to another site completely and they use your info and account to rip unsuspecting buyers off of their purchase money and/or deposits .You are then left dealing with these unhappy people as a result of this scam. The 5 minutes it will take you to read and understand it will be worth the $$$ you and others save getting ripped off.

Here's a couple to get you started here, use the <<Previous Step - Next Step>> to go further...

http://pages.ebay.com/help/confidenc...henticity.html

http://pages.ebay.com/education/spoo...l/spoof_2.html