This promotion is done in collaboration between Dosenbach and Gonnado. Gonnado runs a couponing service and is mandated by Dosenbach to do this promotion.
To give you a brief overview, we have summarized the most important points for you here (this does not replace the above-mentioned Privacy Policies, please also read these):
Your data will be transmitted to both Dosenbach and Gonnado.
The form for ordering the coupon explains what your data is used for.
Yes, you can delete your data again at Dosenbach and Gonnado at any time.