Use the link to delete your account (it’s called deactivation at one point, but it seems everything is properly erased).
URLS:
http://www.geni.com
http://www.geni.com/account_settings/close_account
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.