Mother's Facebook message to father is not adequate notice about adopting child, court rules.

A pregnant unwed mother can’t use Facebook alone to notify the father about the baby before putting the child up for adoption, Oklahoma’s highest civil court has ruled.
The case was the latest to test the legal weight of communication through Facebook and other social media. Previously, for instance, courts have debated whether a plaintiff in a lawsuit could use Facebook to serve legal papers — such as summonses or hearing notices — on a defendant.

Article here (via Wall Street Journal law blog).