Here are the materials in Matt v. United States (D. Mont.):
37 Fort Belknap Motion to Quash
40-1 Opposition to Motio to Quash
45 DCT Order Granting Motion to Quash
The underlying complaint against the US is here:
third party subpoena
Tribal Immunity Does Not Block Third Party Subpoena in Ongoing Grand Canyon Skywalk Development Disputes
Here are the materials in Grand Canyon Skywalk Development v. Cieslak (D. Nev.) & Grand Canyon Skywalk Development v. Steele (D. Ariz.):
1 Motion to Quash in 15-663 D. Ariz.
Ute Tribe Prevails in Tenth Circuit Immunity Decision on Third Party Subpoenas/Collateral Order Doctrine
Here are the materials in Bonnet v. Ute Indian Tribe:
An excerpt:
The issue before us is whether a subpoena duces tecum served on a non-party Tribe and seeking documents relevant to a civil suit in federal court is itself a “suit” against the Tribe triggering tribal sovereign immunity. Exercising jurisdiction under 28 U.S.C. § 1291, pursuant to the collateral order doctrine, we hold the answer is yes. We therefore reverse the district court’s denial of the Tribe’s motion to quash based on tribal immunity.
And the briefs:
Lower court materials here.
Ute Indian Tribe Files Notice of Appeal in Immunity Case Involving Third-Party Subpoenas
Federal Court Denies Ute Motion to Quash Civil Supoenas in Third Party Action
Here are the materials in Bonnet v. Harvest (US) Holdings Inc. (D. Utah):
Magistrate Order Denying Motion to Quash
Ute Objections to Magistrate Order
DCT Order Denying Motion to Quash
Turtle Talk 