The use of our website as well as our apps is usually possible without providing personal data. As far as on our sides personal data (for example name, address or email addresses) are raised, this takes place, as far as possible, always on voluntary basis. This data will not be passed on to third parties without your express consent. We would like to point out that data transmission over the Internet (e.g. communication by e-mail) can be subject to security vulnerabilities. A complete protection of the data against access by third parties is not possible. The use of published postal addresses, telephone or fax numbers and email addresses for marketing purposes is prohibited, offenders sending unwanted spam messages will be punished. The operators of these pages expressly reserve the right to take legal action against unsolicited mailing or e-mailing of spam and other similar advertising materials.