I was checking my bank account and noticed a $7.50 charge. What is this for?

If there is not enough money in your nominated account on the usual payment day, or there is another reason that your account was unable to be debited, you will be charged the Biller’s Administration Fee of $7.50. This will be added to your next debit amount.  

Note: Please speak with your bank if you had sufficient funds in your account on the DD day, as to why the debit request was rejected.