I agree that Stefan Köppen may store and use my contact details (name, address, email address) to occasionally inform me about interesting products and services by email. My contact details will not be passed on to third parties without my permission or legal permission. My above consent is valid until I revoke it. I can declare this revocation at any later time without giving reasons with effect for the future by telephone, in writing or by e-mail (see imprint for contact details). I am also entitled to the other rights shown in the privacy notices.