I have found a long lost friend on facebook. The only problem is I am not on facebook, so using my son's facebook profile can I send a message to her??
If I can will this message be private or everyone can see it???
It depends on her settings. I have my Facebook so that nobody who is not in my 'friends' list can message me.
If her settings aren't so stringent you can certainly send a private message. Click on your friend's name and you should see two buttons - click the 'send message' button and you will send a private message.
She might not get the message though. If you are unconnected, I think the message goes into the 'other' mailbox. I don't think you get notifications when one drops in there.
That would be the best way to go. If she knew you as your maiden name (sorry to make assumptions about marital status), make sure you double barrel or she might not know who you are.