Orders for bespoke items, large order, or discounts applied on a quote may need to be reviewed by an Admin/Management before they are confirmed. This would help our user to ensure that there are no errors on the quote and that the pricing offered have been approved. This would give our users/admins more confidence that no errors are occurring on their quotes.
It is possible to setup a custom validation based on any criteria. You or we or a third party would need to write the logic but this can help you prevent orders being taken based on any validation criteria.