In case you enter a discount code during checkout that doesn't exist or isn't currently active, then you can see the message: “Unable to find a valid discount matching the code entered”.

Normally, one discount code is only applied for one offer. However, If the users put a vast of items in their cart, it is easy to use one coupon code to purchase items. It depends on Casetify's policy, you can contact Casetify via mail for your reference.

To avoid this problem, you should check out carefully Casetify promo code before that promo code could be expired, some promo codes are tied to a minimum purchase, a first-time purchase, or tied to geography, and other reasons.

Firstly, you need to check out whether Casetify offers Casetify First Time Coupon Programs at that moment or not. If this program exists you can:

• Step 1: Sign up for a new Gmail, Yahoo, or whatever other email service provider that you want.

• Step 2: Complete your new Casetify profile and start searching for Casetify First Time Coupon.

Usually, Coupon Stacking is not allowed at Casetify. However, the store will surely give out notice if available.