A diploma contract is what a student chooses when the goal is to finish the whole programme and receive a diploma at the end.
You need to meet the admission requirements for the programme that you wish to register for.
A credit contract is the type of contract that you use when you wish to register for one or more courses that are extra and not necessary to be able to graduate.
Good to know:
How?
If you only want to take the exam and do not want to participate in the educational activities, you choose an exam contract. This is not possible for every course (eg. not for courses with practical sessions, group projects… check the study guide)
Good to know:
How?