Final Fantasy XIV Database - Ffxivpro.com

To my knowledge, when one jumps servers and encounters their original name being already taken on the server they wish to transfer to they are allowed to change their name. However, I want to know under what circumstances if any would one be alowed to stay in their server but change their name. Other than deleting it and starting over of course >.>

If anyone has had experience in this and wishes to share something please tell ^^