When you schedule a payment, Bill Payment warehouses the payment until it is time to process it. The time to process will vary depending on how the payment is to be made and how long it will take to get the payment to the payee.
Once the system has determined that it is time to process the payment, the payment is changed to a processing status. The payment is then processed by conducting an electronic funds transfer, or a check is produced and made payable to the payee from your account. The check is then sent to the payee via regular mail.
It is recommended that you to submit payment requests seven days in advance of the bill due date, this ensures there is sufficient lead time to process your request and get it to the payee by the date you specify.