There are two types of contractual collaboration:
Authorized exam centres conclude a contract with the Goethe-Institut responsible: the institutions conduct examinations under the supervision of the Goethe-Institut and grade the examinations themselves. The Goethe-Institut orders the examination materials and issues the certificates.
Licensees conclude a contract with the Goethe-Institut Head Office. The institutions conduct exams independently, i.e. they order exam materials, organize exams, grade papers and issue certificates. The Goethe-Institut exercises supervisory control.