ORDER TO SHOW CAUSE

PHILIP A. BRIMMER, District Judge.

The Court takes up this matter sua sponte on the Notice of Removal [Docket No. 1] filed by defendant Travelers Property Casualty Company of America. Defendant states that the Court has subject matter jurisdiction over this lawsuit pursuant to 28 U.S.C. § 1332(a). Docket No. 1 at 2, ¶ 3.

In every case and at every stage of the proceeding, a federal court must satisfy itself as to its own jurisdiction, even if doing so requires sua sponte action. Citizens Concerned for Separation of Church & State v. City & County of Denver, 628 F.2d 1289, 1297 (10th Cir. 1980). Absent an assurance that jurisdiction exists, a court may not proceed in a case. See Cunningham v. BHP Petroleum Great Britain PLC, 427 F.3d 1238, 1245 (10th Cir. 2005). Courts are well-advised to raise the issue of jurisdiction on their own, regardless of parties' apparent acquiescence. First, it is the Court's duty to do so. Tuck v. United Servs. Auto. Ass'n, 859 F.2d 842, 844 (10th Cir. 1988). Second, regarding subject matter jurisdiction, "the consent of the parties is irrelevant, principles of estoppel do not apply, and a party does not waive the requirement by failing to challenge jurisdiction." Ins. Corp. of Ireland v. Compagnie des Bauxites de Guinee, 456 U.S. 694, 702 (1982) (internal citations omitted). Finally, delay in addressing the issue only compounds the problem if it turns out that, despite much time and expense having been dedicated to a case, a lack of jurisdiction causes it to be dismissed or remanded regardless of the stage it has reached. See U.S. Fire Ins. Co. v. Pinkard Constr. Co., No. 09-cv-00491-PAB-MJW, 2009 WL 2338116, at *3 (D. Colo. July 28, 2009).

It is well established that "[t]he party invoking federal jurisdiction bears the burden of establishing such jurisdiction as a threshold matter." Radil v. Sanborn W. Camps, Inc., 384 F.3d 1220, 1224 (10th Cir. 2004). Defendant invokes 28 U.S.C. § 1332(a) as the basis for this Court's diversity jurisdiction. Docket No. 1 at 2, ¶ 3. Section 1332(a)(1) states: "The district courts shall have original jurisdiction of all civil actions where the matter in controversy exceeds the sum or value of $75,000, exclusive of interest and costs, and is between [] citizens of different States." The facts as presently averred, however, do not provide sufficient information regarding plaintiff's citizenship.

The notice of removal identifies plaintiff Restoration Enterprise, LLC as a "limited liability company organized under the law of Colorado with its principal place of business located in Colorado." Docket No. 1 at 2, ¶ 4. This information is not relevant to plaintiff's citizenship. While, for diversity purposes, "a corporation shall be deemed to be a citizen of every State and foreign state by which it has been incorporated and of the State or foreign state where it has its principal place of business," 28 U.S.C. § 1332(c)(1); see Carden v. Arkoma Assocs., 494 U.S. 185, 196 (1990),1 these considerations are irrelevant to the determination of the citizenship of an LLC. See Siloam Springs Hotel, L.L.C. v. Century Sur. Co., 781 F.3d 1233, 1237-38 (10th Cir. 2015) ("[I]n determining the citizenship of an unincorporated association for purposes of diversity, federal courts must include all the entities' members.").

The notice of removal further states that "Plaintiff's sole member is a resident and citizen of Colorado" and "Plaintiff is a citizen of Colorado." Docket No. 1 at 2, ¶ 4. As support for this assertion, defendant provides an email from plaintiff's counsel stating that plaintiff is a "single-member LLC, the sole member of which is an individual resident of Colorado." Docket No. 1-11. This statement is insufficient for two reasons. First, domicile, not residency, is determinative of citizenship. Whitelock v. Leatherman, 460 F.2d 507, 514 (10th Cir. 1972) ("[A]llegations of mere `residence' may not be equated with `citizenship' for the purposes of establishing diversity."); see also Mississippi Band of Choctaw Indians v. Holyfield, 490 U.S. 30, 48 (1989) ("`Domicile' is not necessarily synonymous with `residence,' and one can reside in one place but be domiciled in another." (citations omitted)). Second, defendant fails to identify the member of plaintiff and the Court is, therefore, unable to independently determine whether it has jurisdiction. Cf. Fifth Third Bank v. Flatrock 3, LLC, 2010 WL 2998305, at *3 (D.N.J. July 21, 2010) (concluding that an allegation that "upon information and belief, the members of [an LLC] are citizens of New York" was insufficient because plaintiff "failed to identify or trace the citizenship of each individual member" of the LLC (internal quotation marks omitted)).2

For the foregoing reasons, it is

ORDERED that, on or before 5:00 p.m. on January 10, 2018, defendant Travelers Property Casualty Company of America shall show cause why this case should not be dismissed due to the Court's lack of subject matter jurisdiction.