Facebook communication?

[Andy]

If you send a message or try to live chat with a friend on Facebook while they are on Facebook via Twitter, will they see your transmissions?

[seoul]

If you send message to your friend then it'll be saved on his/her inbox but he/she can't access it from twitter. Facebook and twitter are two different site, so to check msg in facebook they have to login into facebook.

But if you are chatting with your friend through any application ( that support twitter also) then you can live chat with your friend.