To update your personal information, you simply need to send necessarily documents with details to support team.
You my specify the changes and the document should include the proof of the changes.
Please make sure you send the request email from the originally registered email address. (the broker cannot accept the request in case the request comes from a different email address.)
To avoid any troubles in the future, you are recommended to update personal information as soon as possible if there are any changes.
For questions for this procedure, you may contact XM support team through Livechat window.