My comments about this issue and how it can be done
Recently there have been a few incidents where a person who is taking part in an Internet chat, instant-messaging or social-networking session observed that one of the participants was about to commit suicide and intervened by contacting their local police via the local regular emergency number or contacting a Netizen who is in the same country as the incident.
You may think that the Netizen contacting the police locally to intervene in an emergency on the other side of the world isn’t feasible but it can be feasible. The local police force who works with the local emergency number can connect with your country’s federal police force or gendarmerie and even use your country’s foreign office to connect with the remote country’s national and local police forces. The local or federal police force may also establish contact with other international police forces through the use of Interpol. They can also use the IT knowhow used for handling money-laundering, child-pornography and similar computer-assisted crimes to locate the origin of suicide notes placed on the Internet.
To make this work effectively, you would need to give the local emergency operator any useful information about the origin of the note or its sender, as well as details about the facility that you witnessed the event on. If you have to use contact(s) local to the incident, give the contacts as much information as possible for them to pass on to the local police.
The local police forces, especially those officers involved in answering the local emergency number must know how to respond to emergency calls that have an international dimension such as this Internet suicide note that had just been witnessed in Australia or the earlier Facebook suicide note that was witnessed in America during April.