A National Police Check contains findings of guilt from any Australian state or territory. It is not limited to any particular state.
There are three types of National Police Checks:
Name only search: this is the most commonly requested criminal background check by employers and for visa purposes. It is a search against your full name only. It will not reveal findings against any previous names or aliases (unless disclosed);
Name with fingerprint search: this may be required for visa, immigration, adoption and overseas employment purposes. It is a search against your full name and fingerprints. You will be required to attend in person for a fingerprint appointment; and
Name with ASIO security assessment: you may require this if you work in a highly sensitive industry (e.g. mining company, agriculture).