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Most landmark shifts in dispute resolution do not arrive with fanfare. They arrive as procedural rulings — dense, technical, easy to overlook — that quietly reshape the conditions under which parties negotiate, settle, and seek resolution.
Berk v. Choy is exactly that kind of ruling. On its face, a case about a missing affidavit and an ankle injury. Beneath the surface, a decision about who controls access to the courthouse — and when that changes, everything downstream changes with it, including when and how cases reach mediation.
What happened
Harold Berk, a Florida resident visiting Delaware, was injured at a hospital. He sued in federal court under diversity jurisdiction. Delaware law required him to attach an expert affidavit to his complaint attesting that his malpractice claim had merit. He could not get one in time. The district court dismissed his case. The Third Circuit agreed.
The Supreme Court reversed — unanimously. Justice Barrett held that Delaware's affidavit requirement conflicts with Federal Rule of Civil Procedure 8, which requires only a "short and plain statement of the claim." States cannot add to what the Federal Rules require at the pleading stage in federal court.
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Rule 8 sets the ceiling for what a plaintiff must provide at the pleading stage — and states cannot raise it.
— Justice Amy Coney Barrett, Berk v. Choy (2026)
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Four shifts at the mediation table
Affidavit requirements functioned as pre-filing screening mechanisms. Cases that cleared the hurdle arrived at mediation with expert support already in place. That filter is now gone in federal court. Here is what changes:
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01 · Expert records
Cases can now reach the table before a plaintiff's expert picture is fully developed. Make expert readiness a standard pre-session inquiry on both sides.
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02 · Defense leverage
Early dismissal on affidavit grounds is gone in federal court. Leverage must now come from the merits — which is a healthier foundation for principled settlement.
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03 · Forum selection
A federal filing in a state with an affidavit requirement may signal expert readiness issues worth exploring in caucus. Ask before the session, not during.
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04 · Insurance authority
Reserves set under pre-Berk assumptions may not reflect actual risk. Verify authority before mediation — not after it collapses over a gap in authorization.
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The bigger ripple
Berk does not stop at hospital waiting rooms. Affidavit requirements for claims against lawyers, engineers, architects, and accountants face the same vulnerability in federal court. Anti-SLAPP statutes — which impose similar early evidentiary burdens — are already being challenged under Berk's framework across multiple circuits.
The broader principle is simple and sweeping: when the Federal Rules answer a procedural question, they answer it for everyone who walks through the federal courthouse doors. States may not post their own gatekeepers at that entrance.
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The easier it is to get into court, the more mediation becomes a merits-focused process rather than a screening mechanism. That is precisely where it does its best work.
— DC Mediation & Dispute Resolution Institute
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For the DC and Mid-Atlantic region — where federal courts handle a substantial volume of professional liability and institutional malpractice claims — Berk is not a distant development. It changes the calculus for where cases are filed, how parties prepare, and when mediation becomes the right move. The cases coming to the table will arrive differently now. The mediation process itself needs to be ready for that.
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