I just received this email response from the AG's office. As expected. This is the same person I was referred to to answer the questions about how a determination was made regarding registering a particular configuration of a firearm that was deemed "legal" on Oahu and "illegal" on Hawaii island, and in that case I got no response at all.
Aloha [punaperson],
I have been forwarded your email in which you requested information on what documentation is sufficient to be unenrolled from Rap Back. I would like to point out, that only those who registered firearms after December 4, 2016 are entered into Rap Back. Therefore, if you had firearms registered PRIOR to this date, you are not enrolled into Rap Back.
You must contact the police chief of the county in which your firearms are registered for information regarding what documentation is sufficient to be unenrolled from Rap Back.
I regret that we are unable to help you.
Regards,
Karen A. Droscoski
Deputy Attorney General
Department of the Attorney General
Criminal Justice Division
333 Queen Street, Suite 200
Honolulu, Hawaii 96813
(808) 586-1086