Welcome to the Community!
Have yourself and the new account holder fill in and sign the Change of Ownership form at https://www.tpg.com.au/forms/Change_of_Ownership_Form.pdf?ver=072716 and email the accomplished forms to firstname.lastname@example.org.
Please ensure to attached 1 valid ID for both of you [current & new account holder]. This process takes 2-3 working days to be completed.
Nonetheless, you can definitely contact us here once you've sent the e-mail as we want to make sure the path for this change is as seamless as possible!