You can verify the customer code on the My au (Web).
Please see below for detailed instructions.
Important notes
This page uses images from My au (Web) for explanations, but the same operations can be performed on My UQ mobile (Web).
Depending on the procedure, you may be required to enter a number with a similar name, such as a "Billing Code" [ご請求コード], so please check the name of the number you are being asked to enter.
Tap on "Registered Customer Information" [お客様登録情報].
5
Check the customer code here.
For your reference
In addition to My au (Web), you can also verify in the breakdown of your WEB de Billing statement, your paper billing statement, or, in the customer copy provided given when you signed up a new contract or when the contract details are changed.