You may already have a USI if you have done any nationally recognised training, which could include training at work, compelting a first aid course or RSA (Responsible Service of Alcohol) course, getting a white card, or studying at a TAFE or training organisation. It is important you try to find out if you have a USI before attempting to create a new one. You should not have more than one USI. To check if you already have a USI, use the 'Forgotten USI' link on the USI website at
https://www.usi.gov.au/students/find-your-usi.