The coupon codes that were created on Coupon Carrier are able to sync with Shopify and appear on Shopify. However, when the customer scans the code (QR Code) or redeems the code via Couponcode (without using the checkout), Shopify is unable to show that it has been used.
*Coupon Carrier shows that it is used.
Anyone can teach me on how to sync these 2?
As coupon codes might not only be used for the shopping cart, it can be used to buy an item on Shopify then redeeming it via the seller's physical store.