How to find detect invisible user on Yahoo messanger

Steps

 * 1)  Open your internet browser.
 * 2)  Type in http://YSeeYou.com
 * 3)  Type in the id you want to check in the input box.
 * 4)  Press enter or the 'Check' button and wait 1 second. The result appears in front of you.

Tips

 * You may use this tool as well for downloading your buddy's avatar.
 * You also can find some more information about the scanned Yahoo ID

Warnings

 * There are several sites like this on the net. You should choose carefully, because most of them don't work well. This one is tested and it can be trusted.
 * Also remember that only a few of them have their own engines. Most of the sites out there just steals the info from the other sites.