Is any information about the customer confidential?

The credit institution is obliged to ensure the confidentiality of the client's identity, accounts, deposits, used financial services, transactions and other bank operations and may not disclose information about the client's and client's transactions, which the credit institution receives in the course of providing financial services in accordance with the concluded contracts (bank secrecy). All data and estimates that have become known to the credit institution about its or another credit institution's customer are considered bank secrets.

§ 88 of the Credit Institutions Act stipulates when and to whom a credit institution may or must transmit customer data.