To redeem a voucher, log in to your account and go to the voucher page from the left sidebar menu.
Enter your voucher code in the required field and submit it. If the voucher is valid, active, and still available, the related reward or credit will be added to your account.
Make sure to enter the voucher code correctly because incorrect codes may not work.
You should also redeem the voucher before it expires, if an expiry date applies.