Payment terms are configured in the Eshopbox workspace to determine the due date for your orders. When an order is invoiced, Eshopbox assigns a due date to it. To calculate the due date, Eshopbox uses the information provided in the payment terms. If Eshopbox is able to find the payment terms for the sales channel, it assigns a due date for the order. Eshopbox will not be able to assign a due date to order if you have configured the payment terms after the order is invoiced.
Eshopbox will assign an overdue tag, once the due date expires.