by means of a clear statement (e.g. a letter sent by post, fax or e-mail) of your decision to withdraw from this contract. You can do so by using the contact details provided on our website.
Muster-Widerrufsformular However, this is not mandatory. To meet the cancellation deadline, it is sufficient for you to send your notification of your exercise of the right of cancellation before the cancellation period has expired.