If you hold a student visa, you must comply with the conditions of your visa. Condition 8202 requires the visa holder to remain enrolled in a registered course, among other requirements.
If you complete the course for which your visa was granted earlier than the end date on the Confirmation of Enrolment, your enrolment will end. You are expected to make arrangements to depart Australia or apply for a new visa. If you have complied with your visa conditions while studying, your visa would not be considered for cancellation (or breaching condition 8202) within three months of completing your course.
However, if you have changed courses since being granted your student visa and your new Confirmation of Enrolment for your principal course has a shorter end date, you must depart Australia or apply for a new visa within 28 days of completing your principal course or your visa may be considered for cancellation.
If you are studying more than one course on your student visa (course packaging) and you finish a course early you could have a lengthy course gap before the next course starts. A lengthy course gap is more than two months, except where a standard academic year ends and begins). Your visa could be considered for cancellation in this situation. We will take into consideration each situation on a case by case basis. These factors include whether a student legitimately finished the course early, whether the student has a good academic record, and whether it is reasonable to expect the student to enrol in another course during the course gap.
You need to be aware that a visa cancellation could be considered if you have breached other student visa conditions.