When you send Postscript coupons to your subscribers, each person will receive a completely unique, one-time use coupon code that is automatically applied to checkout.
If you'd like to view what coupons have been used, simply navigate to your Shopify admin & click on the "Discounts" tab to the left of the page.
From here, you can easily view all of the coupons that have been created & sent. You can also see which ones have been used & which are still active.
If you click on one of the coupons, you can view all of the details associated with that discount.
Hopefully that helps - but if you have further questions, please don't hesitate to reach out to us in chat by clicking the chat icon on the bottom right corner of the screen.