How to submit a complaint
You can submit your complaint by:
Email: complaints@chdr.nl
Phone: +31 (0)71 751 7125
Complaints can be submitted verbally or in writing. If you are a study participant and would like help explaining or documenting your complaint, support is available on request and free of charge.
What happens after you submit a complaint?
If you provide your contact details, we aim to contact you about your complaint within two business days.
