The prerequisite for obtaining a Confirmation of Participation is the successful completion of the corresponding course. For some courses you may be required to take a quiz. To pass the quiz you must answer at least 80% of the questions correctly. Only then you can generate your Confirmation of Participation by clicking on the “Print your Certificate” button. If you didn't get the required score, you can start the quiz again. Note: If you have larger gaps in your knowledge, you can take the desired lessons again individually.