How do I use my Gift Card? Nick M October 12, 2019 18:42 Updated You can head to Harrys.com/giftcard to apply your gift card to your Harry’s account to be used on future purchases, or, you can enter it in checkout under Payment Methods. You can find your code on the back of the card above the barcode. Articles in this section Where can I get a Harry's Gift Card? How do I use my Gift Card? I'm having problems with my Gift Card.