This post describes a simple process to check if your friend has blocked you offline or is really invisible on Yahoo, AIM or MSN Messenger.
How to know if my friend is invisible on Yahoo Messenger? Has he blocked me on Yahoo Messenger?

Yahoo Block checker lets you check if you are invisible on yahoo
In order to figure out if your friend is online but invisible on Yahoo Messenger, follow the steps below
1.) Point your Browser to YahooBlockCheker at http://www.yahooblockchecker.info/
2.) Once at it, enter the Yahoo ID of the person whose status you wish to know. YahooBlockChecker doesnt ask you to enter your userid or password. All it asks for is the Yahoo ID of the person for whom you wish to know the real status.
3.) Press Check after you have entered the Yahoo ID. Yahoo Block Checker then queries the Yahoo Server to know the status of the Yahoo User ID.
4.) If a user is online and appears invisible to you, you should get the status as Online in the result page. This also confirms that your friend has blocked his actual status from being shown to you.
How to know if my friend is invisible on AIM? Has he blocked me on AIM?
Similarly, in order to check the status of your AIM friend to figure out if they have blocked you on their messenger application, follow the steps below
1.) Point your Browser to AimBlockChecker at http://www.aimblockchecker.net/
2.) Once at it, enter the AIM Screen name of the person whose status you wish to know. AIMBlockChecker doesnt ask you to enter your userid or password. All it asks for is the AIM Screen Name of the person for whom you wish to know the real status.
3.) Press Check after you have entered the AIM Screen Name. AIMBlockChecker then queries the AIM Server to know the status of the AIM User.
4.) If a user is online and appears invisible to you, you should get the status as Online in the result page. This also confirms that your friend has blocked his actual status from being shown to you.
How to know if my friend is invisible on MSN Messenger? Has he blocked me on MSN?
1.) Point your Browser to MSNBlockChecker at http://www.msnblockchecker.info/
2.) Once at it, enter the Complete Msn ID with @hotmail.com or with @msn.com or @somedomain.com of the person whose status you wish to know. MSNBlockChecker doesnt ask you to enter your userid or password. All it asks for is the MSN ID with proper domain information of the person for whom you wish to know the real status.
3.) Press Check after you have entered the MSN User ID with domain information.
4.) If a user is online and appears invisible to you, you should get the status as Online in the result page. This also confirms that your friend has blocked his actual status from being shown to you.
I have a friend who seems to be invisible on Gtalk. How Can we be invisible on Gtalk?
You can go invisible on Gtalk. Also, by following a simple hack you can even know if you friend is invisible on Gtalk. Read Gtalk adds Invisible Mode to learn more about that.
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Cheers
Vaibhav
Filed under: Chat, Tutorials | Tagged: Aim Messenger, Aim Screen Name, Block, Block Checker, Browser, Computers, Google, Gtalk, Internet, Invisible, Messenger Application, Messenger Yahoo, MSN Messenger, Order Status, Yahoo, Yahoo Id, Yahoo Messenger, Yahoo Msn, Yahoo Server, Yahoo User Id | 2 Comments »