You NEED the following to register:

Your official ID book (if you are not a citizen of South Africa, you will need your passport)
A unique email address
City and site where you want to write
NBT requirements from the institutions where you plan to apply
Date when you want to write (allow 4 weeks for the institution(s) to which you have applied to receive your results. You can access your results on our website after 5 weeks.)
Pen and paper to record your username and EasyPay number