Updated Release Testing Instructions WooCommerce 4.9 (markdown)

Release-Testing-Instructions-WooCommerce-4.9.md

@@ -239,5 +239,23 @@ Original issue: https://github.com/woocommerce/woocommerce/issues/27688
 ### Better error messages when coupons are stuck in a pending order
 
 PR for reference: https://github.com/woocommerce/woocommerce/pull/28592
+Original issue: https://github.com/woocommerce/woocommerce/issues/27673
+Gif showing the issue: http://g.recordit.co/2Le77QGIYM.gif
 
-**To test:**
+**To test:**
+
+**Test Case #1: While logged in to the user account at the front end**
+
+- Create a coupon with a usage limit of 1 (either per user, or a global usage limit).
+- Checkout using this coupon, but use a payment method that will allow for the payment to be failed. (For example, WooCommerce Stripe Sandbox where you can use the following test Credit Card details that will result in the failed payment: credit card number: `4000 0000 0000 9995`, expiration date: `02/22`, CVC: `222`).
+- Checkout using this coupon again. 
+- You should see the following message: `Coupon usage limit has been reached. If you were using this coupon just now but order was not complete, you can retry or cancel the order by going to the my account page`.
+
+***
+
+**Test Case #2: As a Guest on the site (not being logged in)**
+
+- Create a coupon with a usage limit of 1 (either per user, or a global usage limit).
+- Checkout using this coupon, but use a payment method that will allow for the payment to be failed. (For example, WooCommerce Stripe Sandbox where you can use the following test Credit Card details that will result in the failed payment: credit card number: `4000 0000 0000 9995`, expiration date: `02/22`, CVC: `222`).
+- Checkout using this coupon again. 
+- You should see the following message: `Coupon usage limit has been reached. Please try again after some time, or contact us for help.`