What Is 28 U.S.C. 1407? The JPML and MDL Process Explained

28 U.S.C. § 1407 is the federal statute that allows related civil lawsuits filed in different federal district courts to be transferred to a single court for combined pretrial handling. The process it creates, known as multidistrict litigation or MDL, is run by a seven-judge body called the Judicial Panel on Multidistrict Litigation. By the end of fiscal year 2025, more than 197,000 actions were pending in MDL transferee courts, and over a million had already moved through the process during the statute’s lifetime.¹

When Section 1407 Applies

Section 1407(a) permits a transfer when civil actions sharing one or more common questions of fact are pending in different federal districts. The panel has to find two things: that consolidation will serve the convenience of the parties and witnesses, and that it will promote the just and efficient handling of the cases.² Both prongs have to be satisfied. Cases can share overlapping facts and still stay put if centralizing them would drag witnesses across the country for little real gain.

The common-facts threshold usually gets met in mass tort litigation involving thousands of plaintiffs alleging injury from the same product, in securities fraud cases where investors claim losses from the same corporate conduct, and in private antitrust disputes. The thread running through all of them is shared evidence: the same product design files, the same internal emails, the same scientific studies. Consolidation keeps dozens of courts from independently fighting the same discovery battles.

One boundary worth flagging: Section 1407(g) exempts antitrust lawsuits brought by the United States or a state government. Private antitrust cases can be consolidated, but government enforcement actions stay in their original courts.³

The Judicial Panel on Multidistrict Litigation

The panel is made up of seven federal judges appointed by the Chief Justice of the United States, no two from the same circuit. Four of the seven have to agree before any transfer can be ordered.² That supermajority requirement was built in to keep a bare three-judge majority from pulling cases out of their home districts.

When the panel decides to consolidate, it picks both the receiving district and the specific judge. It weighs where the largest concentration of cases is already pending, where key parties and evidence sit, whether a judge somewhere already has the litigation well underway, and each court’s overall caseload. For nationwide litigation, the panel often looks for a centrally located forum, and it will sometimes send a case to a less-established district to build a broader bench of judges with MDL experience.⁴

How Cases Get Transferred

Under Section 1407(c), a transfer starts one of two ways. A party in any of the pending cases files a motion with the panel, or the panel acts on its own initiative. A party filing the motion also has to file a copy in the district court where its own case is sitting. The panel then notifies every party in every action being considered and holds a hearing.²

A detail that catches litigants out: filing a transfer motion does not freeze the underlying cases. The panel’s rules make this explicit. Pending motions, conditional transfer orders, and other panel proceedings do not suspend pretrial activity in the district courts.⁵ If you want a stay while the panel decides, you have to ask the district court separately.

Once granted, a transfer order takes effect when it’s filed with the clerk of the receiving court, and the transferee judge takes over all pretrial activity across every transferred case.⁵

Tag-Along Actions

MDLs keep growing after the initial consolidation. New lawsuits filed later that share common facts with an existing MDL are called tag-along actions. Under JPML Rule 7.1, parties and attorneys in previously transferred cases have to notify the panel’s clerk as soon as they learn of one.⁵

The clerk can then enter a conditional transfer order (CTO). If no one objects within seven days, the CTO takes effect and the case joins the MDL. To fight it, a party has to file a notice of opposition within those seven days and follow up with a formal motion to vacate within 14 days of the clerk’s opposition notice. Miss either deadline and the transfer stands.⁵ Cases filed directly in the transferee district skip the panel entirely; the parties just ask for assignment to the MDL judge under local rules.

What the Transferee Judge Does

Section 1407(b) gives the transferee judge authority over all pretrial proceedings in the consolidated cases.² One judge coordinates discovery, rules on motions to dismiss and summary judgment, and resolves the disputes that would otherwise play out separately in dozens of courtrooms. Without that centralization, the same corporate witnesses could face depositions in fifty cities, and courts in different circuits could reach opposite conclusions on identical legal questions.

In large MDLs, the judge usually orders plaintiffs to fill out standardized plaintiff fact sheets covering personal information, medical history, and litigation background. A Federal Judicial Center study covering 2008 through 2018 found transferee judges ordered fact sheets in 87% of MDLs with more than 1,000 actions, and in more than half of the proceedings studied, judges dismissed individual cases where plaintiffs failed to submit a substantially complete fact sheet.⁶ For a plaintiff in an MDL, treating the fact sheet as optional is one of the fastest ways to lose the case.

Federal MDLs often run alongside related state-court cases, and the panel has no authority over state filings. Transferee judges bridge this informally through joint discovery plans, shared document depositories, cross-noticed depositions, and joint hearings on scientific evidence disputes. Protective orders under Federal Rule of Evidence 502(d) help prevent privilege waiver when documents move across systems.⁷

How MDLs Actually End

Most MDL cases never reach a jury. Through fiscal year 2025, over 1,095,000 actions had been terminated in transferee courts, against just 17,678 remanded for trial.¹ Transferee judges actively push toward resolution, and bellwether trials are one of the main tools.

A bellwether trial takes a small number of representative cases and tries them to verdict. The point isn’t to resolve every claim but to give both sides real data about jury reactions, damages, and the strengths and weaknesses of the evidence. Bad losses for defendants build settlement pressure; bad losses for plaintiffs drive weaker claims out.⁸

Selecting the right bellwethers is the hard part. Cases skewed toward the strongest or weakest plaintiffs won’t produce results either side treats as credible. Courts typically use some mix of random selection, stratified sampling by injury type or exposure level, and party input. Bellwether cases also have to be trial-ready and filed in a venue where the transferee court has jurisdiction, unless the parties waive venue objections.⁸

When bellwether results and pretrial rulings push toward resolution, the outcome is often a global settlement covering most plaintiffs in the MDL. A master settlement agreement typically includes eligibility criteria, a formula for calculating individual awards, a registration process, a payment schedule, and a walkaway clause the defendant can invoke if too few plaintiffs opt in. Each plaintiff’s recovery depends on their own circumstances, unlike a class action where one judgment covers the whole group.

Returning Cases Home

Section 1407(a) requires that every transferred case be sent back to its home district at or before the close of pretrial proceedings, unless it was already resolved.² The statute says “shall,” and the Supreme Court has read that as mandatory. In Lexecon Inc. v. Milberg Weiss, the Court held that a transferee judge cannot use the general transfer statute at 28 U.S.C. § 1404 to keep a case for trial in their own court.⁹

Parties can waive their Lexecon rights and consent to trial before the transferee judge. Courts require any waiver to be clear and unambiguous, with the party spelling out exactly what it’s giving up.¹⁰ In some MDLs both sides prefer that, since the transferee judge already knows the case.

Remand can happen three ways. The transferee judge files a “suggestion of remand” with the panel, the panel acts on its own, or a party files a motion to remand. The panel gives heavy weight to the transferee judge’s view, and a party filing a remand motion has to disclose whether it asked the transferee judge for a suggestion of remand and what the judge said.⁵ The panel can also remand individual claims within a case separately from the rest of it.

Can a Transfer Decision Be Appealed?

Barely. Section 1407(e) flatly prohibits any appeal of a panel order denying a transfer. That decision is final. For orders granting a transfer, the only route is a petition for an extraordinary writ under 28 U.S.C. § 1651, and the petitioner has to show a “clear and indisputable” right to relief. Appellate courts almost never second-guess the panel’s centralization calls.³

MDL Is Not a Class Action

People often confuse the two, and the difference matters. In a class action, one or a few named plaintiffs represent an entire class, and the court’s decision binds everyone in it. In an MDL, every plaintiff keeps a separate lawsuit. Your case has its own facts, its own damages calculation, and its own outcome. Section 1407 centralizes only the shared pretrial work, not the individual merits of each claim.

That has practical consequences. An MDL plaintiff who ignores discovery deadlines, skips the fact sheet, or fails to respond to court orders can lose their individual case no matter how the broader litigation is going. And while global settlements are common, each plaintiff typically decides independently whether to accept an offer, unlike in a class action where a court-approved settlement binds the class unless a member opts out.

1
United States Courts. Judicial Panel on Multidistrict Litigation — Judicial Business 2025
2
Office of the Law Revision Counsel. 28 U.S.C. 1407 – Multidistrict Litigation
3
Office of the Law Revision Counsel. 28 U.S. Code 1407 – Multidistrict Litigation
4
United States Judicial Panel on Multidistrict Litigation. The Workings of the U.S. Judicial Panel on Multidistrict Litigation and the Selection of the Transferee Court
5
United States Judicial Panel on Multidistrict Litigation. Rules of Procedure of the United States Judicial Panel on Multidistrict Litigation
6
Federal Judicial Center. Plaintiff Fact Sheets in Multidistrict Litigation
7
Duke Law Judicial Studies. Chapter 4 – Coordination of Federal and State Court Proceedings
8
Federal Judicial Center. Bellwether Trials in MDL Proceedings – A Guide for Transferee Judges
9
Legal Information Institute. Lexecon Inc. v. Milberg Weiss Bershad Hynes & Lerach
10
Weil, Gotshal & Manges LLP. Keeping a Transferee Judge for Trial in a Multidistrict Litigation