Even reporting non-payment could be useful to someone. Let's assume this customer orders an expensive server, then talks it to be continued without a payment due to past activity.
A provider would see that it's common for him not to pay, and additional information and deny this.
While a good, customer caring provider would occasionally allow a customer to be overdue for sometime if they have issues.
Another would be to knowing to terminate service earlier, for example we have 18 day period before termination (suspended in a few), but it still ties up resources. If we see a lot of non-payment reports, we could make it so that he has only 7 days. Money saved!
Especially if it's a resold dedicated server.
But this brings me the idea that maybe there should be severity 0 as well: A simple report of delay on payment, not a non-payment report, just another host reporting that this customer has been overdue.
OR other kind of additional information of the customer.