Why Rule 12(b) Matters
Rule 12(b) of the Federal Rules of Civil Procedure is meant to be simple. It allows a defendant to ask a court to dismiss a complaint before answering it—if the complaint itself is legally defective on its face. Importantly, nothing is proven or disproven in this motion; the court may not weigh allegations, evidence, or legal arguments. Used correctly, Rule 12(b) filters out defective pleadings while preserving legitimate claims for adjudication. Misused, Rule 12(b) lets judges erase cases before they ever begin—without lawful adjudication.
Facial vs. Factual Attacks
Two kinds of Rule 12(b) motions:
- Facial attack. The defendant says in effect, “Even if all the allegations in the complaint are true as stated, the complaint doesn’t state a claim for which the court may grant relief.” Here, the court must assume all allegations are true, and decide only whether, on its face, the complaint states a claim for which relief may be granted.
- Factual attack. The defendant disputes the truth of the allegations. Evidence may be considered, and the court may make findings.
Most early motions are facial.
Raising Multiple Objections in One Motion
Rule 12 promotes efficiency. A defendant must combine any/all of its objections under Rule 12(b) in a single motion—for example: “Dismiss for lack of subject-matter jurisdiction under Rule 12(b)(1), or alternatively for failure to state a claim under Rule 12(b)(6).” That combination is legitimate. The problem arises when the court mishandles the sequence, as follows.
The Mandatory Sequence of Review
When both 12(b)(1) and 12(b)(6) objections are raised, the judge must follow this strict order:
- Determine jurisdiction (12(b)(1) first. See Steel Co. v. Citizens for a Better Environment, 523 U.S. 83 (1998) and Mortensen v. First Fed. S&L, 549 F.2d 884 (3d Cir. 1977).
- If jurisdiction exists, then—and only then—apply Rule 12(b)(6).
- If jurisdiction is lacking, stop. Dismiss without prejudice, and treat any 12(b)(6) issue as moot because a court with no jurisdiction has no power to decide anything related to the merits.
When Jurisdiction Exists — The Proper 12(b)(6) Test
Once jurisdiction is confirmed, apply the Twombly/Iqbal plausibility test: accept well-pleaded facts as true; disregard bare legal conclusions; ask whether those facts plausibly state a claim. See Bell Atlantic v. Twombly, 550 U.S. 544 (2007); Ashcroft v. Iqbal, 556 U.S. 662 (2009); Fowler v. UPMC Shadyside, 578 F.3d 203 (3d Cir. 2009).
Claim-by-Claim Analysis Required
Because Rule 12(b)(6) concerns legal sufficiency, the court must analyze each claim separately and state the particular grounds for dismissal. Vague statements such as “the complaint is vague and conclusory” violate Rule 7(b)’s requirement of particularity and prevent meaningful review.
Rule 8 Keeps the Standard Minimal
Rule 8(a)(2) requires only “a short and plain statement of the claim showing that the pleader is entitled to relief.” Rule 12(b)(6) is a low-bar screen—not a trial on the papers.
Where the Process Breaks Down
Courts often collapse the Rule 12 sequence into a single sentence:
“The court lacks subject-matter jurisdiction under Rule 12(b)(1); alternatively, the complaint fails to state a claim under Rule 12(b)(6).”
That formulation is structurally void. It declares, in one breath, that the court has no power to act and yet uses that same power to decide the merits. A tribunal cannot both disclaim and exercise jurisdiction. Doing so violates Steel Co. v. Citizens for a Better Environment, 523 U.S. 83 (1998), which forbids “hypothetical jurisdiction.” A court without jurisdiction has only one lawful function—to announce the lack of power and stop.
Why the Breakdown Matters
The Rule 12 sequence protects litigants by forcing transparency: jurisdiction first, merits second.
When that order is inverted, three kinds of abuse appear:
- False assumption of jurisdiction. The court actually lacks jurisdiction but proceeds to rule on the merits—exercising power it does not have.
- False denial of jurisdiction. The court plainly has jurisdiction but dismisses under Rule 12(b)(1) to avoid adjudicating the claims or to distort appellate review.
- Dual contradiction—the hybrid dismissal. The court declares “no jurisdiction” under 12(b)(1) and simultaneously grants 12(b)(6) to reach the merits. This is the most common and most damaging form. It allows the judge to dispose of the case “with prejudice” while claiming immunity from review—denying Article III adjudication and merits resolution in the same act.
Each variant collapses the constitutional sequence of adjudication. The result is not a mere procedural error but an ultra vires act—a judgment issued without lawful power.
How to Spot the Violation
Ask four questions when reviewing any dismissal:
- Does the order invoke both 12(b)(1) and 12(b)(6) in the same ruling?
- Did the judge explicitly find jurisdiction before applying Twombly/Iqbal?
- Were the counts analyzed separately and on their own terms?
- Did the court explain how a case dismissed “for lack of jurisdiction” could also be dismissed “with prejudice”?
If any answer is no, the ruling likely violates the Rule 12 framework—and the judgment is open to collateral attack as structurally void.
Case Study: Miller v. County of Lancaster, M.D. Pa. No. 1:24-cv-00014
1) The Defendant’s Motion
County counsel moved “to dismiss under Rules 12(b)(1) and (6)” (Defendants’ Motion to Dismiss — MDPA ECF 17). Because the motion was a facial attack, i.e. defendants hadn’t filed an answer, the court was limited to the pleadings and required by Steel Co. and Mortensen to decide jurisdiction first.
2) The Magistrate’s Report and Recommendation
Magistrate Judge Carlson declared that “federal courts generally lack subject-matter jurisdiction over Pennsylvania Right-to-Know Act claims,” yet applied Twombly/Iqbal and recommended dismissal with prejudice while invoking discretionary abstention under the Declaratory Judgment Act (R&R — MDPA ECF 59).
That single document combined three powers that cannot coexist:
- Denial of jurisdiction (12(b)(1));
- Merits adjudication (12(b)(6)); and
- Abstention (which presupposes jurisdiction).
By exercising all three at once, the magistrate both disclaimed and used Article III power.
3) Plaintiff’s Objections
Plaintiff objected that “a court cannot disclaim jurisdiction and then decide the merits,” demanded de novo review under 28 U.S.C. § 636(b)(1)(C), and restated the Steel Co. sequencing rule (Objections — MDPA ECF 60).
4) District Judge’s Order
Judge Wilson adopted the magistrate’s report almost verbatim, holding that “federal courts generally lack subject-matter jurisdiction” and that Plaintiff “fails to state a claim,” then dismissed with prejudice (Dismissal Order — MDPA ECF 64. In one sentence, the court both denied jurisdiction and exercised it.
5) The Appeal — How the Defect Deepened
On appeal, the Third Circuit repeated the same contradiction. A clerk’s letter (3d Cir. Doc. 11-1) diverted the appeal into “possible summary action” and stayed briefing before jurisdiction was confirmed.
The panel’s memorandum (3d Cir. Doc. 59) then affirmed dismissal “under the Declaratory Judgment Act” while simultaneously upholding “lack of jurisdiction” under 12(b)(1)—an impossible pairing because abstention presupposes jurisdiction.
The court also described the complaint as “wholly vague and conclusory,” effectively issuing a 12(b)(6) merits ruling.
The final judgment (3d Cir. Doc. 60) affirmed without any jurisdictional analysis, completing the same jurisdiction-merits collapse at the appellate level. However, this decision must finally be reversed.
6) Why This Matters
| Stage | Rule Requires | What Happened |
| District Court — R&R | Decide 12(b)(1) first; stop if no jurisdiction | Ruled “no jurisdiction,” applied 12(b)(6), and invoked abstention |
| District Court — Order | De novo review of specific objections | Relabeled specific objections as “general”; adopted R&R wholesale |
| Court of Appeals | Verify jurisdiction before affirming | Affirmed both 12(b)(1) and abstention; issued merits rulings without jurisdiction |
The record now reads, at every level: jurisdiction denied, merits decided.
That is the precise sequencing error condemned in Steel Co.—an act ultra vires to Article III.
The Takeaway
Under Steel Co., Bell v. Hood, and Mortensen, a judgment that both denies and exercises jurisdiction is void ab initio, no matter how many courts affirm it.
When a dismissal order or appellate opinion cites both Rule 12(b)(1) and Rule 12(b)(6), or uses abstention without first finding jurisdiction, the contradiction is not hidden in procedure —it is visible on the face of the record.