25 CFR § 15.303
Where may I file my claim against an estate?
February 24, 2021
(a) You may submit your claim to us before we transfer the probate file to OHA or you may file your claim with OHA after the probate file has been transferred if you comply with 43 CFR 30.140 through 30.148.
(b) If we receive your claim after the probate file has been transmitted to OHA but before the order is issued, we will promptly transmit your claim to OHA.