Please download the CDIB form from https://www.bia.gov/sites/bia.gov/files/assets/public/raca/online_forms/pdf/Certificate_of_Degree_of_Indian_Blood_1076-0153_Exp3-31-21_508.pdf then submit the form to the tribe which you want to claim the membership. if you need further detail information, please contact the tribe directly.
Go to your census office.
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