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 Lens-Filter.com's policy, you can contact Lens-Filter.com via mail for your reference.

To avoid this problem, you should check out carefully Lens-Filter.com 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.

Gift Cards from Lens-Filter.com are usually offered on major discount days or to loyal customers. If available, it will be shown. Let's check the coupon list.