Similar to the Bank account upgrade scam, this comes as an e-mail requesting you to update your Facebook, Twitter, LinkedIn, eBay, or PayPal accounts. The scammers inform you that the site is going through a revolutionary change to make communication better.
To take advantage of the changes, you are required to log in by clicking on the link provided. The link opens a fake Facebook, Twitter, eBay, or PayPal webpage, which has - just like the real one - spaces for username and password. The duplicates are very well done, looking similar to the homepage of the above-mentioned websites.
How to avoid: before writing your username and password look at the web address in the browser. The fake ones look similar to this: http://k2nxw.com/cgi-bin/login/ or www.paypal5281.com. If you are not sure, log into your real account just like you usually do, by typing the web address in the browser by yourself and not using the links provided.