A Certificate of Electrical Safety (sometimes called a compliance certificate) is the official record that prescribed electrical work has been completed to the required safety standard by a licensed electrician.
The certificate confirms the work was tested, meets relevant Australian wiring standards, and was carried out by a licensed practitioner. It typically covers what work was done, the date, and the electrician's licence details.
Beyond the legal requirement, a compliance certificate is useful documentation if you sell the property, make an insurance claim, or need to prove work was done to standard. Always ask for one, and be wary of anyone offering electrical work without providing it.