Ending your DED membership can only happen in writing.
Please send this to firstname.lastname@example.org . A member stays a member until an e-mail is received from the board that your request has been processed.
Remember that only notifying your teammates is not sufficient.
Membership termination must occur before the 30th of June, or you will automatically stay a member for at least the first half of the following season.
You will then carry the obligation to pay the relative fee for the half OR the full season membership to the club!