This error occurs when a payment is initially accepted but later gets returned.
With the contracts in ON, we only register if the payment gets accepted when it is first submitted. If this later gets returned by the bank, the contract in ON will not update. Instead, the payment information in Smart Tuition will reflect this. Smart Tuition is automatically set up to send an email to the parents when these payments get returned.
For fulfilling the payment, it is up to the parent to follow through with the message sent.