According to the Debt Collection Act the debtor is responsible for the costs associated with the collection of a debt.
The fees in cases where the debtor is a consumer have been defined by law as follows:
Payment Reminder: Max. 5 €
Demand for Payment:
Max. 14 €, if the principal is no more than 100 €
Max. 24 €, if the principal is over 100 €, but no more than 1 000 €
Max. 50 €, if the principal is over 1 000 €
Max. 14 €, if the debt can be transferred directly to enforcement
Payment Plans: 20-50 € depending on the size of the debt and the number of installments.
Moving the Due Date at least 14 days: Max. 5 €