Invoice Created: Invoice is created with a due date Mission Scheduled: System automatically creates a "mission" on external server with your reminder rules Days Before Due Date: Each day, system checks if today matches any "days before due date" reminder Send Time Check: At your configured Daily Send Time, if triggered, email is composed and sent Placeholder Replacement: Subject and body placeholders replaced with actual invoice/customer data Email Dispatch: Email sent to customer with "From" address set to your company email Progress Tracking: Portal tracks which reminders have been sent for each invoice Phase Transition: Once due date passes, mission switches to Overdue phase automatically Configuration: Reminders at 14, 7, and 1 days before; Daily Send Time: 09:00 AM