After submitting the contact form, your personal data is processed by the person responsible for data protection. The purpose of this is for processing your request based on the consent you have given by submitting the form.
There is no legal or contractual obligation to provide personal data. The only consequence of not providing your personal data is that you cannot submit your request and we cannot process this.
You have the right to revoke your consent at any time by written communication. Doing so does not affect the lawfulness of consent-based processing carried out up to the point of revocation.