The 12Go credits can be topped up by you or they can be received as refunds after cancellations or after price changes. The funds on the internal account can be used to book any ticket or service that 12Go offers. Bookings can be made from the 12Go account without any transaction fees. Credit amounts on the account can not be redeemed in cash, to credit cards, PayPal or any other way and can not be transferred to other accounts.