last month i regisnted for net bank (commonwealth) & i forgot to write down my client number. If i cant re resister for a new net bank account. Your Client ID is different to your debit card number or the account number. You can retrieve your client number with your card number and pin, if u. We've contacted Commonwealth Bank for comments, and we'll update if we . Years ago they let you save the client number and password!. I think it was NAB that would accept more game girl barbie for a password but it would only check the first 6 or so. Options Mark as New Bookmark Subscribe Highlight Print Email to a Friend Report Inappropriate Content. Minimum of 8 standard keyboard characters. NAB passwords are just as useless. Your client number will be displayed and you'll be able to log on to NetBank using your current password. In other words, as far as CommBank is concerned, Password1 is exactly the same as password1 and PASSword1.