...
Canceling domains can be done via the https://ac.managedomain.nl/ Log in with your username and password, click on the domain you want to cancel and choose "administration" -> "create cancellation". You will immediately receive a confirmation of the cancellation by e-mail. Note that the cancellation is only valid after receiving this confirmation. If it concerns a move away from a domain, you automatically get the authorize code automatically sent by email for most extensions and the domain is "unlocked" so that it can be moved.
Working method for other services
...