A coupon code is provided directly by the residential colleges to student's who qualify for it. When a College issues a coupon code, they are essentially paying for the student's registration fee.
How does the coupon code affect my application?
If you have used a sponsored coupon code from a specific college to pay your registration fee, you will not be able to change the order of your preferences. However, if you wish to make changes to your preferences and forgo the sponsored coupon code, you can contact Central Admissions at residentialcolleges@uwa.edu.au and pay the registration fee.
