There are two possible ways of rejection:
The application is not yet complete and will be returned to your account. You will receive the reason for rejection and you can submit the additional documents using the improvement function.
The submitted application does not meet the predetermined requirements. An example of this is applying for an extension, while no valid Aanstellingspas is present. Unfortunately, the costs of the application will not be refunded. These costs mainly consist of processing the application, not just for the Aanstellingspas.