https://www.fairwork.gov.au/endingem...

Employment can end for many different reasons. An employee may resign or can be dismissed (fired). However it ends, it’s important to follow the rules about dismissal, notice and final pay.

How to give notice

To end an employee’s employment (also known as firing or terminating employment), an employer has to give them written notice of their last day of employment.

An employer can give notice to the employee by:
•delivering it personally
•leaving it at the employee’s last known address, or
•sending it by prepaid post to the employee’s last known address.

Employees who are resigning don’t need to give notice in writing they can give it verbally.

Employment can be terminated during leave, but the correct amount of notice still needs to be given.