With respect it is not the case that you cannot park a domain until you have changed the nameservers. It is only necessary to change the nameservers in order for the domain to be accessed properly by other users on the web. I have tested this by creating a tk domain whose nameservers do not point to heliohost and then parking this on heliohost. I have also done this with another co.uk domain which has never been associated with heliohost. Though on trying to park yet a third I did get an error but a very different one: "Error from park wrapper: Using nameservers with the following IPs: 216.21.226.71,216.21.234.71 Sorry, the domain is already pointed to an IP address that does not appear to use DNS servers associated with this server. Please transfer the domain to this servers nameservers or have your administrator add one of its nameservers to /etc/ips.remotedns and make the proper A entries on that remote nameserver. " I have also done what you requested and changed the nicmil.co.uk nameservers to the heliohost nameservers (ns1.heliohost.org and ns2.heliohost.org). I then waited to ensure that after testing with three separate lookup servers that they are reported as being the heliohost nameserves and then trying to park this domain. I am still unable to do so. I still get the same error message that the domian belongs to another user. So clearly your sytem still recognises this domain as being owned in your system. I have changed the nameservers back now as I cannot afford to loose email to this domain's email addresses.