You should ask a sysadmin on the site. OSM is transparent about account deletion (see link), however only automatic deletion leads to a ‘white list’ label.
URLS:
http://www.openstreetmap.org
http://wiki.openstreetmap.org/wiki/FAQ#How_can_I_close_my_account.3F
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.
