Voucher example: 1234567890_098765432109876 (underline only separator) Don't know how to log in? search on google "how to login wifi ID" The code can be seen in the purchase history Vouchers can be kept for 7 days, as long as they have not been used/logged in to wifi.id. If there are any problems, please contact via my item message, the message will be answered as quickly as possible. Thank you for purchasing at this shop.