Since the installation of a new hotline was established in February 2004 in Australia, 50,000 calls were made turning in illegal workers and visa over-stayers.
Immigration Minister Amanda Vanstone said the community played a critical role in protecting the immigration system.
"Information provided through the dob-in line and other telephone contact with the Department of Immigration and Multicultural and Indigenous Affairs is passed to the departments compliance officers around the country," she said.