How do I know why my application was refused?

If Justis intends to refuse your Certificate of Conduct, you will first receive written intention stating the reasons for refusal. You are allowed to let Justis know your view with regard to the reasons for refusal. If you wish to inspect your criminal record, you should write to the Central Criminal Records Office (Justitiële Informatiedienst, Postbus 337, 7600 AH Almelo), enclosing a copy of your identity document. A fee is payable for this service. You can also see your criminal record at the nearest district court (rechtbank) but you are not allowed to make copies.