You can block the person so that it can no longer send you messages.
yes
Ask your friend if you can log on to his/her facebook and message facebook.
You might see the message that a person isn't available right now on Facebook Messenger if they have turned off their active status, are offline, or have blocked you. It could also mean they've deactivated their account or are experiencing connectivity issues. If the person has restricted their privacy settings, you might not be able to message them at all.
Kristen Poterek currently lives in Detroit, Michigan. The exact person that she likes is unknown to the general public. She does however, have a Facebook account.
A scenario is posting a message on Facebook. A sender is the person posting the message. The receiver is the person who will read the message.
how to block messages of unknown person on facebook
it means to send a private message on facebook between you and the other person so not everybody sees it.
Contact Facebook with your claim to close the account.
A Facebook account can not be permanently deactivated. A person can reactivate the Facebook at anytime.
Talk to the site manager and report that the person in question is using an unauthorized Facebook account
Unfortunately no, at this time the only way to register on Answers.com is with a Facebook account.
A check mark means the person saw the message.