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.
Toll free helpline phone number is +1 (866) 94O OOO5
Call them for technical help ;;;