The most obvious place to begin when establishing or correcting one's blood quantum would be with the tribe itself. Typically, the tribe has copies of the base rolls from which the membership of the tribe is drawn. If you suspect that your blood quantum is incorrect, the tribal enrollment office should be your first stop. Their job is to calculate and correct blood quantum for the tribe. The tribal enrollment office can often find the blood quantum mistake and correct it immediately.
Proper documentation is necessary to get an incorrect blood quantum changed.
State certified birth and death certificates are required by tribal enrollment offices. This establishes an applicant's lineage to the enrolled ancestor. It also establishes paternity for the applicant. There are instances when the tribal enrollment office cannot change a blood quantum. If there is a question of blood degree on the base roll, then the Bureau of Indian Affairs must be consulted.