You can complain about an unlawful debit to your credit card using the so-called chargeback procedure. Almost one in four adults in Germany have complained about an unjustified debit from their card issuer.
Fraudulent activities were most often behind the unwanted debits. In the event of a dispute - or if the bank refuses - you can contact an arbitration board or contact the bank responsible for the chargeback. The chargeback process works with credit cards from Mastercard, Visa and American Express. Each transaction can only be complained about once, explains the Finanztip portal.