Long Lost Families was founded to look primarily for family and loved ones that have lost contact for a long time. We are aware that people go missing both in the long and short term and are happy to provide external links that may extend and help in your search, however long they have been missing from your life.
Here are a range of links both national and International that you can use to search for a missing person. They are independent sites but can be extremely useful.
The police website to report a missing person.
A private charitable organisation looking for missing people.
General advice and links.
https://en-gb.facebook.com/austmissingpersons/. (ABOVE FB PAGE)
http://www.doenetwork.org/. (SAME FOR MANY COUNTRIES)