Invisiblity No Longer Remains...C the Invisibles

the methods are pretty simple and they can be done by anyone .

GTalk (Google Talk)
1. Open the Chat window of the particular User on whom you want to find whether he/she is invisible.
2. Now Click on Option and Select the 'Go off the Record' option.
3. Now type some message and send it.
4. Now here is the trick, if you get a response "User is Offline and can't receive messages" in red font colour, then it means your victim is really offline.
5. If you dont get a response, it means your friend is in invisible mode and you are now ready to disturb them.

Yahoo Messenger
Well it is really easy to find out the same in Yahoo Messenger.
1. Open the Chat window of the particular User on whom you want to find whether he/she is invisible.
2. Now load the IMvironment "Doodle" and please wait since the IMvironment takes some time to load which depends on you connection speed.
3. Now if the Imvironemnt loads then the user is online.

These are tricks for checking the invisible people in Gtalk and Yahoo Messenger.

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How to find invisible users in Gtalk.

1.) Start a new chat with the intended user. 
2.) Set the chat to off the record so that it doesn’t get logged to the gmail account.
3.) Send a message to the user. If the user is online and invisible, the message will be delivered.
4.) If the user is offline, you will get an error message indicating that the user is offline.