You can buy up to 4 train tickets at once in one transaction. Or you can also use the tiket.com group booking service to order a minimum of 10 tickets. Group booking services are available by contacting tiket.com customer service which is open 24 hours via Whatsapp at 08551500878, by telephone at 0804 1500 878 / (021) 3973 0888, or via email at cs@tiket.com.