Just to learn what is involved in obtaining a tribal id:
Pottawatomie Tribe Contact: Charles Clark, Tribal Rolls Director email@example.com
Cherokee Nation Contact: Cherokee Nation Registration Department at 918-458-6980 or 1-800-256-0671
Chickasaw Tribal Contact: 580-436-7250 or firstname.lastname@example.org
Choctaw Nation of Oklahoma: 1-800-522-6170
Absentee Shawnee Tribe: 405-878-4712
Most of the tribes require, at a minimum, a certified birth certificate and ancestral lineage to the Dawes Rolls. It depends on the tribe as to whether the lineage is traced maternally or paternally.
Whether or not you accept the tribal ID is a question only your institution can answer based on perceived risk. It is on our secondary ID list.