Comment 2 for bug 1965579

I can replicate this on a server running 3.8. If the negative bill is unchecked, the payment goes through successfully, but if it is check the error message appears and the credit card is charged.

On 3.6, the error appears and the credit card is NOT charged. This is more desirable, but still leads to a potentially frustrating loop for the patron. It would be better if the negative billing could not be selected when paying fines in the OPAC.