Ann: Quarterly Activities Report June 2021, page-23

Davy
In a nutshell
If you pay using Bpay just send the money for the total amount of shares you want to buy .
Use the link they provide to get the Bpay details .
You are guaranteed to get your entitlement and very likely to get any shortfall shares you want too .
In the unlikely event that there is an oversubscription for the shortfall shares you might get a few shares less than you applied for and get a refund for some of the money you paid .

If not all the shortfall shares are taken up by current share holders what is left goes to the underwriters that will place them with their clients or associates .

Any way it pans out the company is guaranteed to get the money since as it is underwritten .
They need to pay an extra 3% in fees for shares that end up with the underwriter and sometimes those shares end up being flipped close to the raise price if there is a big shortfall .