Mobile Integrated Ticket ATH.ENA Go - Account Based Ticketing System, Mobile Ticketing Experience the new service of the ATH.ENA card using the Account Based Ticketing system. Just issue an ABT card and tap it on the reader. The ABT system ensures the best fare for you. No more waiting in long lines to recharge your ATH.ENA card. You can apply for the ABT card at subway stations, through the ATH.ENA Go app, or on the official website. Best Fares There’s no need to top up in advance anymore. Just tap on the reader, and the best fare will be applied daily.