Outdated Invoice Payment Confirmation Deliveries/Payment Issues

We have re-issued all open invoices via QuickBooks, enabling online payment again. We have also updated our domain configuration to prevent additional emails from being sent from our previous invoicing portal provider.

Email notifications for invoices long since paid were re-delivered to customers, some dating as far back as 2018, and in some cases with multiple deliveries per invoice. These notifications were delivered by our invoicing portal provider in error. We have notified them of this issue, and at their recommendation, we have disconnected our accounting systems from their platform. As a result, the flood of duplicate invoice paid emails should now have stopped, but previously sent open invoices now cannot be paid via the platform. We are monitoring the situation and will update as soon as we have resolution.