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”.

To use the Shape Shift coupons on their website, you need to meet the conditions:

•  The items you choose must meet all coupon requirements as explained in the Terms and Conditions.

• The coupon has not expired. 

• The seller uses the Shape Shift checkout system or a customized checkout system that accepts the coupon.

Normally, Shape Shift will make it easy to use online coupons with scannable barcodes, such as 53% off your entire purchase, in-store. ... You can check your Shape Shift digital coupons to use In-Store.

To avoid this problem, you should check out carefully Shape Shift 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 Shape Shift offers Shape Shift 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 Shape Shift profile and start searching for Shape Shift First Time Coupon.