My Friends Place Inc Corporate Office & Headquarters

my friend got deactivated a week ago and my friend went to log back in but it says her email address is invalid. is there anything my friend can do to try and get it back

i couldnt add friends...when i add my old friends i receive a message," Do you know this user personally? To prevent misuse of Facebook, this request can't be sent. To learn more, please visit the Help Center." but i add only my known friends..pls help me to come out of this problem.