The system provided me with a message that a fee payment was rejected but I cannot find it in the rejected payment history. What could have happened?

This means that you did not complete the checkout and payment process after the fee validation.

The validation of fees takes place during checkout, and rejected fees are automatically removed from your cart. However, you must continue the checkout, select a payment means and submit your order for the rejected fees to appear in your Rejected fee payment history.

If you do not check out, but instead go back to check the fees again or add additional fees, the rejected fees have already been removed from your cart and so will not be validated again. Therefore, they will not appear in your Rejected fee payment history.

If all fees are rejected, you will not be able to complete the checkout and so these fees will not appear in your Rejected fee payment history.