For Cash on delivery orders that contains coupons with free delivery we have two situations:
In this case we send the full amount (your selling price + shipping) to NOD but we remove the “cash on delivery” option when sending it to NOD. So the courier won’t ask for COD payment upon delivery and the products are fully assured.
In this case we send the remaining difference to NOD by subtracting the voucher amount from each product proportionally. We keep the “cash on delivery” option but the customer will pay only the remaining amount: total – voucher amount.
Important: the assured amount is equal to the remaining amount in this case.
In this case, in Nod appear the payment method “Cash on delivery” and the amount to be paid.
in this case, the order is already paid with card, and cash on delivery is missing.