A candidate's right to work in Australia can change any time, not just when a work visa expires.
A work right change may be a condition to the visa, or it may be that the current visa has expired or cancelled.
Unless you are regularly checking, you will not know that a visa condition has changed.
WorkPro offers a secure, integrated link to the Department of Home Affairs Visa Employment Verification Online (VEVO) database which allows organisation's to easily and in bulk, check candidate's right to work and rely on the WorkPro program automatically continuing to poll the VEVO database and provide notification of any changes to a visa which may impact their engagement with an organisation.