Questão jurídica principal
Whether the cantonal court violated the appellant's right to be heard by refusing further evidence on the contents of the fee-advance letter.
Decisão extraída
No. The record already established that the appellant received the letter with the payment deadlines and vouchers; no further evidentiary measures were necessary.
Fundamentação extraída
Copies of the letter and vouchers in the file, together with accounting extracts showing late payment dates, sufficiently proved the relevant facts.