25 CFR § 115.602
How will the BIA notify you or your guardian, as applicable, of its decision to restrict your IIM account?
February 24, 2021
The BIA will notify you or your guardian, as applicable, of its decision to restrict your IIM account by:
(a) United States certified mail to your address of record;
(b) Personal delivery to you or your guardian, as applicable, or to your address of record;
(c) Publication for four consecutive weeks in your tribal newspaper if your whereabouts are unknown and in the local newspaper serving your last known address of record; or
(d) United States certified mail to you in care of the warden, if you are incarcerated. The BIA may send a copy of the notification to your attorney, if known.