If you are a new or continuing student undertaking nationally recognised training, you need a USI in order to receive your qualification or statement of attainment. If you don’t have a USI you will not receive your qualification or statement of attainment.
Create a USI by following this link
If you are an international student studying offshore and do not intend on travelling to Australia to complete or undertake study, you do not need a USI. This also applies to New Zealand citizens.