Transfer Addon Domain From One Account To Another


Jan 21, 2004
I have someone who has two accounts and has an addon domain setup on one. He wishes to switch the addon domain over to the other account because they wish to cancel the main account under the addon domain.
I do not see an easy way to do this as they have a couple of databases setup for the addon domain as well as a couple of email accounts. Or am I wrong? Will/should this be a long and tricky process?
Any help and guidance would be appreciated.
Thank you