Since we are able to send more than one invoice to a patient, we need to be able to send reminders for all of those invoices. For example, I have patients who have a copay and a balance. They have to pay the copay, but the amount toward their balance can be whatever they are able, so we allow partial payments. I send an invoices for each separately to the patient, but when I go to send a reminder, I am only able to send a reminder for the most recent invoice. I need to be able to send the reminder for each invoice.