To begin with, have you entered it in the right place? See the article "where do I fill in my sponsor code".
The sponsor code must be given to you by a Blue Valet customer, it consists of 4 letters and 1 number. When you have filled in the sponsor code when registering on our site, you will receive an email with a promo code to use for your 1ʳᵉ booking.
To find out where to fill in your promotional code received by email, see the article "where do I fill in my promotional code".
If you are unable to enter your promotional code, see the article "my promotional code does not work".