How to redeem the League of Legends Gift Card US? Log in to Riot Game Client with your game account. Click on the “Store” button which can find in-game. Click on the “Purchase RP”. Select the “Prepaid Cards” option and enter the digital code. Select “Submit” to complete the redemption. Note: lol Gift Card is only valid for Riot account registered in the country of the United States (US). All purchases are strictly not refundable nor exchangeable.