If you’ve been sexually assaulted, you can report to the Police for an investigation, or as a report only with no further action. You can find out more about the options by looking at the Reporting Options for Victims page on the NSW Police Force website.
If you don't want an investigation and don't want to speak to a police officer, you can use the Sexual Assault Reporting Option (SARO) online reporting tool. This can be completely anonymous.