If my customer placed an order with a discount applied, will the same discount carry over during the return process?
Forwarding the discount
When a customer returns an item purchased with a discount and later requested for an exchange, the discount from the original purchase will automatically carry over and be applied to the new exchange order.
Scenario
A customer purchased a pair of pants for $80 using a $20 discount code. Later, they request an exchange for a different product.
With higher value exchange enabled, your customers are allowed to exchange an item that is of a higher price. So, if the customer wishes to exchange for item B, priced at $150, they will now be required to pay for the $70 difference.
With forward discount, the $20 discount code will be carried forward to offset the price difference. In this case, the customer would only need to pay $50 for the new exchange item.
Without forward discount, the previous $20 discount code is forfeited. In this case, the customer would need to pay $70 for the new exchange item.