Just take a good look at them and pay attention to details like the wrong poster size and the support link. Official vouchers and tickets are clearly recognizable. Believe me, we wouldn't put such amateurishness in terms of graphics and text out.
We recommend buying tickets only on our website: https://obsceneextreme.cz/en/tickets or from our official distributors. In case you are buying a ticket from someone else, it is better to make sure that it is official. Just email aneta@obsceneextreme.cz and we will confirm that it is a valid ticket from us.
Thanks for your understanding and see you soon!!!