[otrs] customer notification with url to registered accounts

Hi, I would like a notifications sent out only to contain the url to the OTRS web service for registered customers. Is there a way to do that? The default Move, State and Owner notifications contain the URL. I could take it out, but for registered customers it is so nice to have it in. (We are at this point reluctant to have people create their own accounts- which might be the simplest work around for now) regards, Frans