We use Google’s reCAPTCHA service in the forms for changing your address, communication data and retrieval account. The purpose of the reCAPTCHA request is to distinguish a human from automated, machine inputs. We base the processing on our legitimate interest (Art. 6(1)(f) GDPR) in protecting the website from automated spying, abuse and spam. To this end, your input is transferred to Google and further processed there. The IP address and, if required, other data used by Google for the service is transferred to Google.
Further information on Google reCAPTCHA and Google’s privacy policy can be found at

https://www.google.com/recaptcha/intro/v3.html or
https://www.google.com/privacy .