Questão jurídica principal
Whether the cantonal court's finding that no new teaching contract was proven was arbitrary
Decisão extraída
No arbitrariness was shown; the renewal-permit request alone did not prove a new agreement, and the appellant bore the burden of proving extinction of the acknowledged debt.
Fundamentação extraída
The court held that the request for renewal of the study permit did not necessarily show that the student understood and accepted a new contract, especially as the circumstances of signing were unknown and no other decisive evidence was established.