S2 Pro Customer Invoice Payment?

Does anyone know of a way to set up a PayPal Pro Form that is used as a once off payment to pay an invoice they have received?

I can add an extra field into the Pro Form for “Invoice Number” but I can’t seem to find a configuration in s2member that is just used to make a once off payment without renewing a subscription or buying a ccap.

Any ideas?

s2Member is meant to manage access restrictions, not products. You could work around that in a couple of ways. The easiest would be to assign a CCAP (say, “paidinvoice”). You don’t have to use that CCAP anywhere to restrict access.