If you have received an Eason Gift card or eVoucher (Euro only), you should have a code which looks something like this:
6280390472825083
On the Payment Information Page, there is a section where you can enter your Gift Card Number and 12-Digit Pin to pay for the order.
Once you have entered your code and clicked Apply, the balance on the gift card will automatically be deducted from the total cost of your order.
You can partially pay for an order by Gift Card with the balance to be paid by Credit/Debit card.