Per default, every customer can create a customer account during your check-out process. If you don't want to offer them the possibility to create their own customer account for your ticket shop, you can disable it.
Create custom CSS Code
Choose the language in which you want to disable the registration for customer account. After that enter the following code and save it.
.sc-step-address #sc_form_shipping .sc-login {
display: none;
}