Most likely you as a participant of one of our courses will not need this service at all. Since the year 2011 by far the most candidates - exactly 98.76% - passed the certification exams at first try.
Nevertheless, to avoid any risk, we want to offer you this service free of charge in 2020. Within six months from the certifcation exam you have the possibility to re-sit the same exam as an online-exam. You will not need to book a complete new course any more.
Enjoy your exam!