Step 1 (Procedural Authority): Does a specific Federal Rule (13, 14, 18, 19, 20, 22, 23, 24) authorize adding this claim or party?
Step 2 (Subject-Matter Jurisdiction): Does the federal court have independent SMJ (§ 1331 / § 1332) or Supplemental Jurisdiction under 28 U.S.C. § 1367?
1 Who is Trying to Add Whom, and Why? (Party Posture)
Party Status2 Identify the Specific Joinder Device Attempted
Device ChoiceUnder Federal Rule 14(a)(1), a defendant may implead a non-party only if the third party "is or may be liable to it for all or part of the claim against it" (contribution, contractual indemnification, or subrogation). Impleader CANNOT be used to assert that the third party is solely liable to the plaintiff ("It was him, not me!").
3 Subject-Matter Jurisdiction & 28 U.S.C. § 1367 Screening
SMJ & SupplementalJoinder Diagnostic Result
RULE 18(a)Supplemental jurisdiction is expressly denied for claims by plaintiffs against parties joined under Rule 14, 19, 20, or 24 when inconsistent with § 1332 complete diversity (Owen Equipment v. Kroger).
A defendant cannot implead a third party under Rule 14 simply to claim the third party is solely liable to plaintiff. Impleader requires derivative liability (contribution or indemnity).
Memorandum Decision & Order
Civ. No. 26-cv-1014 (Joinder & § 1367 Practice)👥 Rule 23 Class Action Workshop & CAFA Screener
Analyze Rule 23(a) certification prerequisites, 23(b) class categories, and the Class Action Fairness Act (28 U.S.C. § 1332(d)).
A Rule 23(a) Four Threshold Prerequisites (ALL 4 REQUIRED)
All Must PassB Rule 23(b) Class Category (Select One)
Category TypesC Class Action SMJ: Traditional § 1332 vs. CAFA (28 U.S.C. § 1332(d))
JurisdictionClass Adjudication Summary
For Rule 23(b)(3) classes, the court must direct to class members the best notice that is practicable under the circumstances, including individual notice to all members who can be identified through reasonable effort. Class members must be granted the unequivocal right to OPT OUT.
Class Certification & Jurisdictional Order
Civ. No. 26-cv-9904 (Rule 23 / CAFA Practice)🗺️ Interactive Visual Joinder Topology
Click any party relationship or arrow below to inspect the governing Federal Rule and statutory jurisdictional constraints.
Click on any party block or connection arrow above to view its operational FRCP test, subject-matter jurisdictional mechanics, and common exam traps.
Extends to Outer Boundaries of Article III
Supplemental jurisdiction automatically extends to all claims forming part of the same constitutional case or controversy under the Gibbs "common nucleus of operative fact" test. This expressly includes claims involving the joinder of additional parties.
Asymmetric Prohibition Restricting Plaintiffs
In diversity-only suits (§ 1332), § 1367(b) strips away supplemental jurisdiction over claims by PLAINTIFFS against persons made parties under Rule 14, 19, 20, or 24 (or claims by Rule 19/24 intervenor plaintiffs), if complete diversity is destroyed!
Comprehensive FRCP Joinder Master Matrix
Procedural tests, compulsory status, § 1367(b) applicability, and controlling Supreme Court precedents.
| Device & Rule | Asserted By | Procedural Prerequisite | Compulsory or Permissive? | § 1367(b) Bar App? | Controlling Precedent |
|---|---|---|---|---|---|
| Rule 18(a) Open Claim Joinder |
Any claiming party (P, D, 3PD) | Party must already have a valid claim against that opponent. May join any independent or alternative claims. | Permissive | No bar (Aggregation allowed against single defendant) | FRCP 18(a) |
| Rule 20 Permissive Party Joinder |
Plaintiffs or against multiple Defendants | Two Prongs: (1) Same T/O or series of T/Os; AND (2) Common question of law or fact. | Permissive | YES on P against co-Ds. (Co-Ps lack $75k saved if diverse). | Exxon Mobil v. Allapattah |
| Rule 13(a) Compulsory Counterclaim |
Defending party vs. Opposing party | Arises out of the same transaction or occurrence as opposing claim. | COMPULSORY (Waived if not pleaded in answer!) | NO BAR (Defendant claim; gets § 1367(a) automatically) | UMW v. Gibbs |
| Rule 13(b) Permissive Counterclaim |
Defending party vs. Opposing party | Any claim that does NOT arise out of same T/O. | Permissive | Fails § 1367(a) (Not same T/O; must have independent SMJ) | FRCP 13(b) |
| Rule 13(g) Crossclaim |
Party against a Co-Party (D1 vs D2) | Must arise out of same T/O as original action or counterclaim. | Always Permissive | NO BAR (Co-party claim; gets § 1367(a)) | FRCP 13(g) |
| Rule 14(a) Third-Party Impleader |
Defendant (as 3P-Plaintiff) vs. Non-Party | Must assert derivative liability (indemnity, contribution). Cannot assert sole liability. | Permissive (14 days as of right) | NO BAR on D's claim. (BUT P's direct claim on 3PD is BARRED!) | Owen Equipment v. Kroger |
| Rule 19 Compulsory Joinder |
Court on motion / sua sponte | 3 Steps: (1) Necessary? (2) Feasible? (3) If not feasible, indispensable under 19(b)? | COMPULSORY (Dismissal under 12(b)(7) if indispensable) | YES (§ 1367(b) expressly denies supp. juris. to Rule 19 absentees) | Provident Tradesmens |
| Rule 23 Class Action |
Class Representative | 23(a): Numerosity, Commonality, Typicality, Adequacy + 23(b) (b)(1), (b)(2), or (b)(3). | Permissive certification | CAFA (§ 1332(d)): Minimal diversity & $5M+. Standard: Rep diverse. | Wal-Mart v. Dukes |
| Rule 24 Intervention |
Absent non-party | 24(a) Right: Interest impaired without adequate rep. 24(b) Permissive: Common question. |
Permissive motion | YES on intervenor PLAINTIFFS under § 1367(b) | FRCP 24 |
💰 Interpleader Showdown: Rule 22 vs. Statutory 28 U.S.C. § 1335
- Subject-Matter Juris: Standard requirements. Needs Complete Diversity (Stakeholder vs. all Claimants) + >$75,000, OR Federal Question.
- Personal Jurisdiction & Service: Standard Rule 4 service within forum state.
- Venue: Regular 28 U.S.C. § 1391 venue rules.
- Deposit Requirement: Deposit of fund with court is not mandatory.
- Subject-Matter Juris: Minimal Diversity between at least TWO adverse claimants (stakeholder citizenship is irrelevant!).
- Amount in Controversy: Only $500 or more.
- Personal Jurisdiction & Service: Nationwide service of process (28 U.S.C. § 2361).
- Venue: District where any claimant resides (28 U.S.C. § 1397).
- Deposit Requirement: MANDATORY deposit of fund or bond with court.
⚖️ Civil Procedure Joinder Hypotheticals
Five high-yield litigation dilemmas testing the collision of the FRCP with 28 U.S.C. §§ 1332, 1367, and CAFA.
Plaintiff's Direct Claim Against Impleaded Third-Party Defendant
View Doctrinal Model Solution ▼
1. Procedural Joinder Authorized: Rule 14(a)(3) permits a plaintiff to assert against a third-party defendant any claim arising out of the transaction or occurrence that is the subject matter of the plaintiff's claim against defendant.
2. Barred by 28 U.S.C. § 1367(b): Under Owen Equipment & Erection Co. v. Kroger (1978), codified in 28 U.S.C. § 1367(b), in diversity-only cases, supplemental jurisdiction is expressly prohibited over claims by plaintiffs against persons made parties under Rule 14 when exercising jurisdiction would violate complete diversity. Because Paula and Owen are both Iowa citizens, Paula's claim against Owen MUST be dismissed for lack of SMJ.
Attempting to Implead Another Alleged Direct Tortfeasor ("Not Me, Him!")
View Doctrinal Model Solution ▼
1. Fatal Rule 14 Defect: Rule 14(a)(1) requires derivative liability: the third party must be liable to the defendant for all or part of the plaintiff's recovery (indemnity, contribution, subrogation). A defendant cannot use Rule 14 to say "Trucker is liable to plaintiff, not me!"
2. Disposition: The third-party complaint must be DISMISSED for improper joinder under Rule 14. If General Contractor wants to blame Trucker, it can plead that as an affirmative defense or evidentiary defense, but cannot bring Trucker into the lawsuit via impleader without a recognized derivative claim.
Rule 20 Permissive Co-Plaintiff With Sub-$75,000 Claim
View Doctrinal Model Solution ▼
1. Procedural Joinder Met: Abigail and Ben satisfy Rule 20(a)(1) (same T/O explosion and common question of ChemCorp's liability).
2. Supplemental Jurisdiction under Allapattah: Under Exxon Mobil Corp. v. Allapattah Services, Inc. (2005), as long as complete diversity is intact and at least ONE named plaintiff satisfies >$75,000 (Abigail), § 1367(a) confers supplemental jurisdiction over co-plaintiffs whose claims share a common nucleus of operative fact. Section 1367(b) does NOT bar supplemental jurisdiction over claims by Rule 20 co-plaintiffs who fall below $75,000. Ben's claim is properly retained.
The Absent Joint Tenant and Rule 19 Indispensability
View Doctrinal Model Solution ▼
1. Necessary Party (Rule 19(a)): Seller 2 is a required party because conveying title directly impairs Seller 2's joint ownership, and the court cannot accord complete relief without binding both owners.
2. Joinder Not Feasible: Joinder destroys complete diversity because Seller 2 and Buyer are both New York citizens. Section 1367(b) expressly bars supplemental jurisdiction over Rule 19 absentees.
3. Indispensability (Rule 19(b)): Balancing the 4 equity factors: severe prejudice to Seller 2, inability to shape relief, and availability of an adequate alternative forum in state court. The court will deem Seller 2 INDISPENSABLE and DISMISS under Rule 12(b)(7).
Consumer Defective Product Class and Subject-Matter Jurisdiction
View Doctrinal Model Solution ▼
1. Traditional Diversity Lacking: Under standard § 1332 diversity, citizenship of the named representative controls, and Lead Plaintiff and TechCorp are non-diverse.
2. Jurisdiction Upheld Under CAFA (28 U.S.C. § 1332(d)): CAFA establishes jurisdiction because: (1) 100 or more class members (50,000); (2) aggregate amount exceeds $5,000,000 ($7.5M); and (3) MINIMAL DIVERSITY exists because at least one class member (e.g. from Oregon or New York) is diverse from TechCorp. The motion to dismiss for lack of SMJ must be DENIED.
3. Rule 23(b)(3) Requirements: To certify, Lead Plaintiff must satisfy Rule 23(a) (Numerosity, Commonality, Typicality, Adequacy) and 23(b)(3) (Predominance and Superiority), and the court must provide individual notice and an opt-out mechanism.
⚡ Joinder & § 1367 Mastery Speed Drill
10 high-yield questions testing Rules 13, 14, 18, 19, 20, 22, 23, 24, CAFA, and statutory limits.