You can voluntarily register in CRUKS (Central Register Exclusion Games of Chance). This is for a minimum of 6 months. If you voluntarily exclude yourself from CRUKS you will not be eligible for a bonus for at least 3 months.
To register voluntarily, please go to the CRUKS website.
You can register with your DigiD or by using a form. Please note that if you register using a paper form, it may take several business days to register in CRUKS.