You will receive a voucher for the total order amount of your order, for example 100,- euro.
If you spend 60,- euro on a new ticket, for example for one of our NYE events, after you have completed that order, you will receive a new voucher with the remaining amount of 40,- euro.
If you then buy a next ticket which is 50,- euro, you can enter the voucher and will have to pay the remaining amount of 10,- euro extra with your creditcard, Paypal or iDeal.