A callback component embedded on a web site determines a current location of the web site. The current location is compared to a known legitimate location of the web site to determine if the web site has been copied to a different host location. Responsive to determining that the web site has been copied to a different location, the callback component alerts a central authority that the web site may be a fraudulent web site set up to launch phishing attacks. If the central authority determines that the web site is fraudulent, the central authority alerts appropriate entities to take down the fraudulent web site. The callback component generates a visual component viewable on the web site to deter phishing attackers from removing the callback component when the web site is copied.