To add/update sub-contact details, please refer to the below guide.
1. Please login your billing area at https://billing.apc.sg/clientarea.php
2. Click on the green "Update" button.
3. Click on "Contacts/Sub-Accounts" tab on the left.
4. Proceed to update your details.
5. Click on "Save Changes".
If you wish to remove a sub-contact, please refer to the above steps 1-3.
Next, choose the sub-contact you wish to delete from the drop-down menu.
Once done, click on "Delete Contact".