This goes for the My.Opera section. Use the deletion URL (be logged in first).
URLS:
http://my.opera.com
http://my.opera.com/community/contact/myopera/?selected=delete
Please note that AccountKiller.com is not associated with the business listed on this page. AccountKiller provides easy-to-understand instructions and guides on how to cancel charges and relationships from the list of businesses on our site, we have no affiliation with these businesses.