25 CFR 11.707: Claims against estate.

(a) Creditors of the estate or those having a claim against the decedent shall file their claim with the clerk of the court or with the executor or administrator within 60 days from official notice of the appointment of the executor or administrator published locally in the press or posting of signs at the tribal and agency offices, giving appropriate notice for the filing of claims.

(b) The executor or administrator shall examine all claims within 90 days of his or her appointment and notify the claimant whether his or her claim is accepted or rejected. If the claimant is notified of rejection, he or she may request a hearing before the court by filing a petition requesting such hearing within 30 days following the notice of rejection.