To send the questionnaire, use the envelope that you have received with the invitation. If by mistake you have not received an envelope you can send the questionnaire to the below address, no postage stamp is needed.
Effectory B.V.
Postbus 20620
1001 NP Amsterdam
The Netherlands
Unable to find the desired answer?
Our friendly help desk will answer all your questions as quickly as possible.
We are happy to help you further!
Complete the request form:
Questions?Call us on:
(English and Dutch only)
Opening hours:
Monday - Friday 8.30 a.m. to 5.30 p.m. CET
Comments
Please sign in to leave a comment.