National Farmers Union Insurance Cos. v. Crow Tribe, 471 U.S. 845 (1985), was a United States Supreme Court case in which the Court held that tribal court remedies must be exhausted before tribal court jurisdiction can be challenged in federal court.
This case ensured that tribal courts would be able to decide questions of tribal civil jurisdiction on their own, at least initially. However, later cases like Strate v. A-1 Contractors and Nevada v. Hicks narrowed the exhaustion requirement from this case.