An Australian police certificate is an official document used to prove that the applicant has no criminal record in Australia. It is usually used in the following situations: 1. Immigration application: Many countries require immigration applicants to provide a police certificate as a necessary document for immigration applications. 2. Job application: Some jobs may require applicants to provide a police certificate to ensure that a reliable and honest employee is hired. 3. Study application: Some learning institutions may require applicants to provide a police certificate to ensure campus safety and protect the well-being of students. 4. Inheritance: Some estates may require heirs to provide a police certificate to confirm their innocence.