Toolkit · Tort

The Tort and Products Liability Toolkit

15 U.S.C. § 2064(b)

Type
Toolkit
Jurisdiction
National
Date
2026-09-01
Topic
Tort

This toolkit is the front door to tort and products liability practice on UpLaw. It maps the field pillar by pillar — the three theories of liability, the negligence prima facie case, premises and professional and employer liability, the three products defect categories, causation and expert proof, defenses and comparative fault, damages and the constitutional ceiling on punitive awards, insurance and risk transfer, recalls and regulatory reporting, aggregation through class actions and MDL, and the litigation lifecycle from intake to verdict. Each pillar gives you the plain-English doctrine, the anchor authority, the classic traps, and a link into UpLaw's deeper guide or checklist. A critical warning runs through all of it: tort and products law are overwhelmingly STATE law, and states genuinely diverge on questions as basic as whether a plaintiff's own carelessness bars recovery entirely. A running example follows a fictional camp-stove maker, Kestrel Outdoor Works, from a single burn injury through recall, MDL, and trial. Use it as a research map: skim the landscape, jump to the pillar you need, and follow the links down.

The Tort and Products Liability Toolkit

Tort > Tort Law | Published 1 September 2026 - Updated 29 September 2026 | UpLaw - uplaw.us

Tort law asks one question in a hundred different registers: when one person's conduct injures another, who bears the loss? There is no federal tort code, no single national rule, and no substitute for reading your own state's cases. This toolkit is the map of the terrain.

Keywords: tort law, negligence, duty, breach, proximate cause, Palsgraf, intentional torts, strict liability, premises liability, products liability, design defect, failure to warn, risk-utility, Daubert, comparative fault, punitive damages, product recall, mass tort, MDL

How to read this toolkit

Tort is the oldest body of American private law and the least codified. It lives in state common law, in state statutes that modify that common law, and in Restatements that describe (and sometimes quietly reform) both. Products liability is tort law's most consequential specialty: the place where a single design decision made once, in a room, can become ten thousand claims.

This toolkit walks the field in eleven pillars. Each pillar gives you four things: the doctrine in plain English, the anchor authority, the traps that catch practitioners, and a link into UpLaw's deeper guide or checklist where the real detail lives. It is a research map, not a treatise.

Read it three ways. End to end once, to build the mental model of how an injury becomes a claim, a claim becomes a case, and a case becomes a verdict or a settlement. Jump to a pillar when you have a live question — "is there a duty here?", "which design-defect test applies?", "must we report this to the CPSC?" — and follow the deep-dive links. Or use the consolidated gated checklist near the end as an audit of any live matter.

One warning governs everything below, and it is not a formality. Tort and products liability are state law. There is no national negligence statute. States diverge on questions as foundational as whether a plaintiff who is one percent at fault recovers nothing (contributory negligence, still the rule in a handful of jurisdictions) or ninety-nine percent of her damages (pure comparative fault). They diverge on whether design defect is tested by consumer expectations, by risk-utility, or by both. They diverge on caps, on repose periods, on whether joint and several liability survives. This toolkit teaches the framework and the majority/Restatement approach, and names representative states. It does not tell you the rule in your state. Confirm that yourself, every time.

A running example keeps the doctrine concrete. Meet Kestrel Outdoor Works, a fictional mid-size manufacturer of backpacking equipment. Kestrel's flagship is the Kestrel Solo, a canister camp stove with a valve assembly redesigned two years ago to shave nine grams. A hiker named Delia Ward is badly burned when her Solo flares on ignition. By the end of this toolkit, that single burn will have produced a demand letter, a CPSC report, a recall, a design-defect suit, a Daubert fight, an MDL, and a punitive-damages ruling. For the doctrinal foundation beneath all of it, keep Tort Law: A Comprehensive Guide to Negligence, Intentional Torts, and Strict Liability and Products Liability: A Comprehensive Guide to Design Defect, Manufacturing Defect, and Failure to Warn open in the next tabs.

The tort landscape at a glance

The eleven pillars, in the order this toolkit walks them:

  1. The theories — intentional torts, negligence, and strict liability, and why the theory you choose dictates everything downstream.
  2. The negligence prima facie case — duty, breach, causation, damages. (Palsgraf; Restatement (Third) of Torts: Liability for Physical and Emotional Harm)
  3. Premises, professional, and employer liability — the recurring duty categories where most negligence cases actually live. (Rowland v. Christian; respondeat superior)
  4. Products liability and the three defect categories — manufacturing, design, warning. (Greenman; Restatement (Second) § 402A; Restatement (Third) of Torts: Products Liability § 2)
  5. Causation and expert proof — but-for, substantial factor, scope of liability, and the expert who must carry it. (Daubert; Fed. R. Evid. 702)
  6. Defenses and comparative fault — the single most state-variable area in the field.
  7. Damages — economic, noneconomic, and the constitutional ceiling on punitive awards. (BMW v. Gore; State Farm v. Campbell)
  8. Insurance and risk transfer — the CGL policy, the duty to defend, and the exclusions that swallow product claims.
  9. Recalls and regulatory reporting — the CPSC's 24-hour clock and its siblings at NHTSA and FDA. (15 U.S.C. § 2064(b))
  10. Aggregation — class actions, MDL, and the mass-tort machine. (Fed. R. Civ. P. 23; 28 U.S.C. § 1407)
  11. The litigation lifecycle — intake, pleadings, discovery, Daubert, summary judgment, trial.

Pillar 1 — The theories: intentional, negligence, strict liability

Every tort claim runs on one of three engines, and the engine determines what you must prove, what defenses apply, whether punitive damages are realistic, and whether insurance will pay.

Intentional torts require intent — but "intent" is a term of art. It means the actor desired the result or knew it was substantially certain to follow (Restatement (Second) of Torts § 8A; Garratt v. Dailey, 46 Wash. 2d 197 (1955), where a boy who pulled a chair from under an aunt was liable for battery on a substantial-certainty theory). The actor need not intend the harm; intending the contact suffices, and the defendant takes the plaintiff as he finds her — the "eggshell skull" principle familiar from Vosburg v. Putney, the Wisconsin schoolboy-kick case. The core intentional torts are battery, assault, false imprisonment, intentional infliction of emotional distress (Restatement (Second) § 46: conduct so outrageous as to exceed all bounds tolerated by a decent society), trespass to land and chattels, and conversion.

Intentional torts matter commercially for a reason that has nothing to do with schoolboys: liability insurance almost never covers them, and punitive damages almost always ride with them.

Negligence is the workhorse — unreasonable conduct causing foreseeable harm. It carries no intent requirement and is the theory in the overwhelming majority of injury cases. Pillar 2 unpacks it.

Strict liability dispenses with fault entirely. Two classical strands: abnormally dangerous activities (blasting, storing explosives, some hazardous-waste handling; Restatement (Second) §§ 519–520 and Restatement (Third) of Torts: Liability for Physical and Emotional Harm § 20, whose modern two-factor test asks whether the activity creates a foreseeable and highly significant risk even when reasonable care is exercised, and whether it is not one of common usage — the doctrinal descendant of Rylands v. Fletcher (1868) L.R. 3 H.L. 330); and animals. To these, the twentieth century added the great modern strand: strict products liability (Pillar 4).

Strict liability is not absolute liability. The plaintiff still proves causation and damages, and the risk must be the kind that made the activity dangerous in the first place.

Kestrel's frame. Delia Ward has no intentional-tort claim. She has a negligence claim (Kestrel designed and tested the valve carelessly) and, in most states, a strict products liability claim (the Solo was defective regardless of how careful Kestrel was). She will plead both. Strict liability spares her the burden of proving Kestrel's conduct was unreasonable; negligence gives her the story a jury wants to hear, and the punitive-damages hook. This is the standard playbook, and it is why the theories in Tort Law: A Comprehensive Guide to Negligence, Intentional Torts, and Strict Liability are worth reading as a set rather than a menu.

Pillar 2 — The negligence prima facie case

Four elements: duty, breach, causation, damages. Miss one and the case dies, usually on summary judgment.

Duty. The general rule is a duty of reasonable care toward foreseeable plaintiffs. The great fault line is Palsgraf v. Long Island Railroad Co., 248 N.Y. 339, 162 N.E. 99 (1928), where Cardozo held there is no negligence "in the air": duty runs only to those within the foreseeable zone of danger, while Andrews, in dissent, would have made duty universal and cabined liability through proximate cause instead. Every state has picked a side, sometimes without admitting it. The Restatement (Third) § 7 reframes duty as a default — ordinary care is owed — that courts may override only for articulated policy reasons.

The hard duty questions are the no-duty rules. There is generally no duty to rescue a stranger (Restatement (Second) § 314), subject to exceptions for special relationships (carrier–passenger, innkeeper–guest, employer–employee, custodian–ward), for those who created the peril, and for those who undertake a rescue and then perform it badly. There is limited duty for purely economic loss absent physical injury, and constrained duty for negligent infliction of emotional distress, where states range from a physical-impact rule, to a zone-of-danger rule, to the bystander-foreseeability approach of Dillon v. Legg, 68 Cal. 2d 728 (1968), later tightened into bright-line factors by Thing v. La Chusa, 48 Cal. 3d 644 (1989).

Breach. Did the defendant fall below reasonable care? The dominant analytic tool is the Hand formula from United States v. Carroll Towing Co., 159 F.2d 169 (2d Cir. 1947): a defendant is negligent if the burden of precaution (B) is less than the probability of harm (P) multiplied by the magnitude of the loss (L). It is not a calculator; it is a way of organizing argument. Industry custom is evidence of the standard of care but is not dispositive — The T.J. Hooper, 60 F.2d 737 (2d Cir. 1932) (tugs without radios were negligent even though radios were not yet customary; "a whole calling may have unduly lagged"). Violation of a safety statute may be negligence per se where the plaintiff is in the class the statute protects and the harm is of the type it was meant to prevent (Restatement (Third) § 14).

Res ipsa loquitur lets a plaintiff reach the jury on breach without direct proof: the event ordinarily does not occur absent negligence, and the responsible instrumentality was within the defendant's control (Restatement (Second) § 328D; the barrel-of-flour case, Byrne v. Boadle (1863)). It is a lifeline in exploding-product and surgical-object cases — see Ybarra v. Spangard, 25 Cal. 2d 486 (1944).

Causation and damages get their own pillar below. For the intake-stage work of testing whether these four elements actually line up in a real file, run Evaluating a Personal Injury Claim: A Practical Checklist alongside the general Evaluating a New Civil Case: A Practical Checklist.

Pillar 3 — Premises, professional, and employer liability

Most negligence cases are not abstract; they fall into a recurring duty category with its own settled rules.

Premises liability. The traditional common law sorted entrants into three boxes — invitee (business visitor; duty of reasonable care including inspection for hidden dangers), licensee (social guest; duty to warn of known dangers), and trespasser (duty only to refrain from willful or wanton harm, softened by the attractive-nuisance doctrine for child trespassers). A substantial minority of states, following Rowland v. Christian, 69 Cal. 2d 108 (1968), collapsed the categories into a unitary duty of reasonable care under all the circumstances, treating entrant status as one factor. Many states now sit in a hybrid position — merging invitee and licensee while retaining a reduced duty to trespassers. This is a paradigm example of state variation: identify your jurisdiction's approach before you draft a single interrogatory.

Professional negligence. Doctors, lawyers, engineers, and accountants are held to the standard of a reasonably competent practitioner in the field — a standard that must generally be established by expert testimony, and one that is measured by professional custom rather than by the lay Hand calculus. Medical malpractice adds informed consent (was the material risk disclosed?) and, in most states, procedural gates: certificates of merit, pre-suit notice, affidavit requirements, and damages caps. Those gates are statutory and state-specific.

Employer and vicarious liability. Under respondeat superior, an employer is liable for torts committed by an employee within the scope of employment — a doctrine of enterprise risk allocation, not employer fault. The frontier questions are the scope boundary (the "frolic and detour" line), the independent-contractor exclusion and its many exceptions (non-delegable duties, inherently dangerous activities, apparent agency), and direct employer negligence in hiring, training, retention, and supervision, which is not vicarious and therefore is not defeated by the employee's frolic. Workers' compensation exclusivity generally bars an employee's tort suit against her own employer, but not against a third-party product manufacturer — which is precisely why so many industrial products cases exist.

When the defendant is a public entity, everything changes: sovereign immunity, notice-of-claim deadlines measured in months, discretionary-function exceptions, and damages ceilings. Start with Suing the Government: A Guide to Damages in Administrative and Public-Entity Litigation, and note that the Federal Tort Claims Act (28 U.S.C. §§ 1346(b), 2671–2680) borrows the tort law of the state where the act occurred while carving out discretionary functions under § 2680(a).

Pillar 4 — Products liability and the three defect categories

Modern products liability begins with two California opinions. In Escola v. Coca Cola Bottling Co., 24 Cal. 2d 453 (1944), Justice Traynor's concurrence argued that a manufacturer should be strictly liable for defective products because it is best positioned to spread the loss and to deter the defect. Nineteen years later, in Greenman v. Yuba Power Products, Inc., 59 Cal. 2d 57 (1963), his court adopted that rule outright — and privity, already fatally wounded by MacPherson v. Buick Motor Co., 217 N.Y. 382, 111 N.E. 1050 (1916), was finished. The rule was then generalized nationally as Restatement (Second) of Torts § 402A, the single most influential provision in American tort law: one who sells a product in a defective condition unreasonably dangerous to the user is liable for physical harm, even though the seller exercised all possible care.

The Restatement (Third) of Torts: Products Liability (1998) reorganized § 402A around three defect categories, and most modern courts now think in its terms even where they have not formally adopted it:

Defect type Test Practical proof
Manufacturing defect (§ 2(a)) The product departed from its intended design, even though all possible care was used. True strict liability. Compare the unit to the spec, the CAD file, the QC records. Often provable by inspection or by res ipsa-style circumstantial proof (§ 3).
Design defect (§ 2(b)) Foreseeable risks could have been reduced by a reasonable alternative design (RAD), and omitting it rendered the product not reasonably safe. Design history, FMEA and hazard analyses, testing records, and an engineering expert who can build and defend the RAD.
Failure to warn (§ 2(c)) Foreseeable risks could have been reduced by reasonable instructions or warnings, and omitting them rendered the product not reasonably safe. Warning content, conspicuousness, adequacy; human-factors expert; what the manufacturer knew and when.

Design defect is where the states genuinely split, and you must know your test. Three approaches coexist:

  • Consumer expectations — the product is defective if it is more dangerous than an ordinary consumer would expect (the § 402A comment i formulation).
  • Risk-utility — the product is defective if its risks outweigh its benefits, usually with a reasonable alternative design as an element or a near-requirement, which is the Restatement (Third) § 2(b) position.
  • Both, in the alternative — the influential two-prong test of Barker v. Lull Engineering Co., 20 Cal. 3d 413 (1978), later confined by Soule v. General Motors Corp., 8 Cal. 4th 548 (1994), which held that the consumer-expectations prong is unavailable where the design's safety involves technical questions beyond common experience.

Whether your state requires a RAD is often the whole ballgame on summary judgment. A plaintiff in a RAD state who cannot produce a feasible, safer, cost-tolerable alternative that a competent engineer would actually build usually loses.

Around these three categories sit the doctrines that decide real cases: the learned intermediary rule (a prescription-drug or device warning runs to the physician, not the patient — Restatement (Third): Products Liability § 6(d)); the sophisticated user and bulk supplier defenses; post-sale duty to warn (§ 10); the economic loss rule, which bars tort recovery when a defective product injures only itself, the federal admiralty statement of which is East River Steamship Corp. v. Transamerica Delaval Inc., 476 U.S. 858 (1986); and federal preemption, a defense that has decided entire litigations. Compare Riegel v. Medtronic, Inc., 552 U.S. 312 (2008) (state claims against a PMA-approved device preempted by 21 U.S.C. § 360k(a)) with Wyeth v. Levine, 555 U.S. 555 (2009) (brand-name drug failure-to-warn claims generally not preempted), and PLIVA, Inc. v. Mensing, 564 U.S. 604 (2011) (generic-drug warning claims preempted because the generic cannot unilaterally change its label). Also Geier v. American Honda Motor Co., 529 U.S. 861 (2000) (conflict preemption of a no-airbag claim).

Kestrel. Delia's engineer will plead all three defects, but only one has legs. There is no manufacturing defect — her stove matched the spec exactly, which is the problem. The design defect claim is the case: the nine-gram valve redesign narrowed the fuel-flow orifice tolerance, and a plaintiff's expert will offer a RAD (the prior-generation valve, still tooled, at a cost of $1.40 per unit). The warning claim is the sleeper: Kestrel's internal test log recorded three flare-ups in bench testing eighteen months before Delia's injury, and it never changed the instruction sheet. That log is the most dangerous document in the company. For the defense-side sequencing of exactly this problem, work through Defending a Products Liability Claim: A Practical Checklist.

Pillar 5 — Causation and expert proof

Causation is two questions wearing one name.

Cause in fact asks whether the injury would have happened anyway. The default is the but-for test. Where two independently sufficient causes converge — two fires, two impacts — courts substitute the substantial factor test (Restatement (Second) §§ 431–433; the Restatement (Third) reframes this as "multiple sufficient causes"). Where the plaintiff cannot identify which of several negligent defendants injured her, two doctrines shift the burden: alternative liability (Summers v. Tice, 33 Cal. 2d 80 (1948) — two hunters, one bullet, burden shifts to each to exculpate himself) and market-share liability (Sindell v. Abbott Laboratories, 26 Cal. 3d 588 (1980) — DES; adopted in some states, rejected in others, and rarely extended beyond fungible-product cases).

Proximate cause — the Restatement (Third) calls it scope of liability (§ 29) — asks whether the harm is of the type that made the conduct negligent in the first place. It is where intervening and superseding causes live: a foreseeable intervening cause (a rescuer's injury, negligent medical treatment of the original injury) does not break the chain; an unforeseeable, extraordinary one may.

In products cases, causation is almost never established by lay testimony. It is established by an expert, and the expert must survive Rule 702. Daubert v. Merrell Dow Pharmaceuticals, Inc., 509 U.S. 579 (1993) made the trial judge a gatekeeper of reliability, listing testability, peer review, error rate, standards, and general acceptance as non-exclusive factors. General Electric Co. v. Joiner, 522 U.S. 136 (1997) held the ruling is reviewed for abuse of discretion and that a court need not admit opinion connected to data "only by the ipse dixit of the expert." Kumho Tire Co. v. Carmichael, 526 U.S. 137 (1999) extended gatekeeping to all expert testimony, technical and experience-based, not just the scientific — a case that was itself, fittingly, a tire failure case. And the December 2023 amendment to Fed. R. Evid. 702 made explicit what many courts had been under-enforcing: the proponent must show, by a preponderance of the evidence, that each element of admissibility is met and that the opinion reflects a reliable application of the methodology to the facts.

Two failure modes cause most exclusions: the analytical gap (the expert's general-causation literature does not reach this plaintiff's exposure or dose) and the untested RAD (the expert sketched an alternative design but never built or tested it). Bring the motion, or defeat it, with Challenging an Expert Under Daubert and Rule 702: A Practical Checklist, and read the admissibility mechanics in The Federal Evidence Toolkit.

Pillar 6 — Defenses and comparative fault

This is the most state-variable pillar in the toolkit. Do not carry a rule across a state line.

Comparative fault now governs in the large majority of jurisdictions, in two flavors:

  • Pure comparative fault — the plaintiff recovers her damages reduced by her own percentage, even at 90% fault. Adopted judicially in California by Li v. Yellow Cab Co., 13 Cal. 3d 804 (1975), and by statute elsewhere.
  • Modified comparative fault — the plaintiff recovers only if her fault is below a bar, either 50% ("not as great as") or 51% ("not greater than"). The one-point difference decides cases at exactly even fault.

A small group of jurisdictions still applies pure contributory negligence, under which any plaintiff fault is a complete bar — historically Alabama, Maryland, North Carolina, Virginia, and the District of Columbia, softened by last-clear-chance. This list has been stable but is periodically the subject of reform bills and litigation; verify current status before relying on it.

The related defenses: assumption of risk, which in most comparative-fault states has been folded into the comparative apportionment (express assumption by contract survives separately, subject to public-policy limits on exculpatory clauses); product misuse and substantial alteration, which in products cases go to defect and causation as much as to defense; the statute of limitations, typically two to three years for personal injury and usually subject to a discovery rule; and the statute of repose, a harder cutoff measured from the product's sale or first use rather than from injury, which exists in some states and not others and can extinguish a claim before it ever accrues.

Finally, apportionment among defendants. Traditional joint and several liability let a plaintiff collect the full judgment from any one liable defendant. Most states have modified or abolished it — some for noneconomic damages only, some above a fault threshold, some entirely (several liability). The Restatement (Third) of Torts: Apportionment of Liability catalogues five distinct tracks. Which track your state is on determines whether the deep-pocket defendant is a target or a bystander.

Pillar 7 — Damages: compensatory, noneconomic caps, and punitive limits

Compensatory damages divide into economic (medical expenses past and future, lost earnings and lost earning capacity, life-care plans, property damage — provable by records, economists, and life-care planners) and noneconomic (pain and suffering, disfigurement, loss of consortium, loss of enjoyment of life — provable by testimony and, ultimately, by persuasion). The collateral source rule traditionally bars reducing an award by insurance payments the plaintiff received, but many states have abrogated or modified it by statute.

Noneconomic damages caps exist in a substantial number of states, most commonly in medical malpractice, and the figures change frequently through indexation, amendment, and constitutional challenge. Several state supreme courts have struck their caps down under state constitutional jury-trial or open-courts provisions; others have upheld them. Any specific cap figure you have in your head is probably stale. Look it up.

Punitive damages require conduct beyond negligence — malice, oppression, fraud, or conscious/reckless disregard of safety — and in many states must be proved by clear and convincing evidence. Federal due process imposes a real ceiling. BMW of North America, Inc. v. Gore, 517 U.S. 559 (1996) set three guideposts: the reprehensibility of the conduct, the ratio of punitive to compensatory damages, and comparable civil or criminal penalties. State Farm Mutual Automobile Insurance Co. v. Campbell, 538 U.S. 408 (2003) sharpened them, observing that few awards exceeding a single-digit ratio will satisfy due process and that a defendant may not be punished for harm to nonparties or for out-of-state conduct lawful where it occurred. Philip Morris USA v. Williams, 549 U.S. 346 (2007) reinforced the nonparty-harm limit as a procedural due process rule. And in the maritime common law, Exxon Shipping Co. v. Baker, 554 U.S. 471 (2008) imposed a 1:1 ratio — a benchmark that is not constitutionally binding on the states but is quoted at them constantly. Many states layer their own statutory caps, bifurcation requirements, and split-recovery statutes on top.

For the mechanics of proving any of this — the economist, the life-care planner, the discount rate, the present-value fight — go to The Litigation Damages Toolkit: Valuing and Proving Money Awards. For a parallel statutory-cap regime that illustrates how differently legislatures treat different injuries, compare Damages in Employment Litigation: Back Pay, Statutory Caps, and Punitive Awards.

Kestrel. Delia's economic damages are $410,000 (surgeries, grafts, lost wages). Her noneconomic claim is the real exposure. And the bench-test log — three known flare-ups, no warning change, a decision memo weighing a $1.40 unit cost against a redesign — is exactly the document that converts a compensatory case into a punitive one. Kestrel's Gore argument will not be that the conduct was fine; it will be that the ratio must stay single-digit and that the jury may not punish Kestrel for the other 40,000 stoves in the field.

Pillar 8 — Insurance and risk transfer

Tort exposure is, in practice, an insurance question. The Commercial General Liability (CGL) policy is the standard instrument: it covers "bodily injury" and "property damage" caused by an "occurrence" — an accident — during the policy period, and it does two distinct things. The duty to defend is broader than the duty to indemnify and is triggered by any allegation potentially within coverage; the duty to indemnify is determined by what the facts turn out to be. That asymmetry is the most valuable thing a policyholder owns.

The exclusions are where products claims go to die. Expected or intended injury (which is why intentional torts are uninsured), "your product" and "your work" (the CGL does not pay to replace the defective product itself — that is a warranty/economic-loss risk, not a liability risk), the impaired property exclusion, and, critically, recall/"sistership" exclusions, which exclude the cost of withdrawing a product from the market. Recall expense is normally covered, if at all, by a separate product-recall policy. Layer on excess and umbrella towers, the occurrence-versus-claims-made distinction, allocation across multiple triggered policy years in long-latency cases, and the reservation of rights letter that starts every coverage dispute.

Work the coverage side through Insurance Coverage Law: A Comprehensive Guide for Policyholders and the program-design side through The Business Insurance and Coverage Toolkit. And do the boring thing first: tender early and in writing. Late notice is the cheapest coverage defense an insurer will ever get.

Pillar 9 — Recalls and regulatory reporting

A defect is not only a tort problem; it is a regulatory one, and the clock is short.

Under the Consumer Product Safety Act, 15 U.S.C. § 2064(b), a manufacturer, importer, distributor, or retailer that obtains information reasonably supporting the conclusion that a product contains a defect that could create a substantial product hazard, creates an unreasonable risk of serious injury or death, or fails to comply with a consumer product safety rule, must immediately inform the Consumer Product Safety Commission. The CPSC's implementing regulations (16 C.F.R. Part 1115) interpret "immediately" as within 24 hours of obtaining reportable information, with a limited window to investigate — a window the Commission reads narrowly and generally caps at ten working days. Civil penalties for late reporting are substantial, adjusted annually for inflation, and have repeatedly reached eight figures in negotiated settlements. Do not guess at the current penalty ceiling; it changes.

One currency note before you lean on an agency's own reading of its statute. Courts no longer defer to an agency's interpretation of an ambiguous statute the way they once did: Loper Bright Enterprises v. Raimondo, 603 U.S. 369 (2024) overruled Chevron and restored de novo judicial interpretation of statutes, with agency views entitled only to Skidmore-style respect for their persuasive power. That does not make the CPSC's regulations disappear — 16 C.F.R. Part 1115 is a legislative rule with its own force, and the practical compliance answer is still "report" — but it does mean an agency's aggressive reading of a reporting trigger or a penalty provision is now more contestable than it was, and that no compliance memo should describe Chevron deference as though it still exists.

Parallel regimes: NHTSA for motor vehicles and equipment (49 U.S.C. §§ 30118–30120 for defect notification and remedy, plus TREAD Act early-warning reporting under 49 U.S.C. § 30166(m)); FDA for drugs, devices, and food (21 C.F.R. Part 7 recall procedures, plus device MDR and food reportable-food-registry duties). The animating principle across all three: the reporting duty is triggered by information, not by certainty, and the internal debate about whether the product is "really" defective is not a defense to a late report — it is Exhibit A at trial.

This is the moment where a company's tort case and its compliance posture merge. Run Managing a Product Recall: A Practical Checklist as the operational playbook, and situate reporting duties within the broader program described in The Corporate Compliance Toolkit. Where the product hazard is also an environmental release or a hazardous-substance question, The Environmental Law Toolkit picks up the reporting duties on that side.

Kestrel. The bench-test log makes this easy to state and hard to do. The day Kestrel's safety engineer reads that log with Delia's incident report in front of her, the § 2064(b) clock starts. Kestrel reports, negotiates a corrective action plan, and issues a voluntary recall with a free valve-replacement kit. The recall costs $2.1 million and is not covered by the CGL. It is also the single best thing Kestrel does — because the alternative is a jury being told the company knew and did nothing.

Pillar 10 — Aggregation: class actions, MDL, and mass torts

One defective valve produces one lawsuit. Forty thousand produce a litigation.

Class actions under Fed. R. Civ. P. 23 are a poor fit for personal-injury mass torts and an excellent fit for the economic-loss claims that ride alongside them. Rule 23(b)(3) requires that common questions predominate, and individualized causation, comparative fault, and damages usually defeat predominance in an injury class. The Supreme Court said so, twice, in the asbestos context: Amchem Products, Inc. v. Windsor, 521 U.S. 591 (1997) and Ortiz v. Fibreboard Corp., 527 U.S. 815 (1999). But a class of purchasers seeking the benefit-of-the-bargain loss on a defective stove — no injury, just a product worth less than promised — can and does certify. Note also CAFA (28 U.S.C. § 1332(d)), which pulls most sizable class actions into federal court. The full machinery is in Class Action Litigation: A Comprehensive Guide to Rule 23 and The Class Action Toolkit.

Multidistrict litigation under 28 U.S.C. § 1407 is the real mass-tort engine. The Judicial Panel on Multidistrict Litigation transfers civil actions sharing common questions of fact to a single district for coordinated pretrial proceedings — consolidated discovery, a leadership structure, a science day, a common Daubert hearing, and bellwether trials that price the inventory. The statutory limit matters: § 1407 authorizes transfer for pretrial proceedings only, and Lexecon Inc. v. Milberg Weiss Bershad Hynes & Lerach, 523 U.S. 26 (1998) held that the transferee court may not self-assign cases for trial — they must return to the transferor court absent a waiver.

Two jurisdictional cases now shape where mass torts can be brought at all. Bristol-Myers Squibb Co. v. Superior Court, 582 U.S. 255 (2017) barred nonresident plaintiffs from joining a state-court mass action absent a connection between the forum and their claims. Ford Motor Co. v. Montana Eighth Judicial District Court, 592 U.S. 351 (2021) then confirmed that a manufacturer that systematically serves a market may be sued there by a resident injured there, even if the specific vehicle was designed, made, and first sold elsewhere — a decision that keeps ordinary products cases in the plaintiff's home forum.

Pillar 11 — The litigation lifecycle: intake, discovery, Daubert, trial

The doctrine above becomes a case through a sequence, and each step has a UpLaw deep dive.

Intake and evaluation. Preserve the product — an unaltered exemplar is worth more than any expert. Photograph the scene. Collect medical records, the purchase record, and the warranty. Identify every entity in the chain of distribution: manufacturer, component supplier, assembler, distributor, retailer. Calculate the limitations and repose deadlines first. Run Evaluating a Personal Injury Claim: A Practical Checklist and, on the defense side, issue the hold immediately — Issuing a Litigation Hold and Preserving ESI: A Practical Checklist. Spoliation of the exemplar or of the design file under Fed. R. Civ. P. 37(e) is a self-inflicted wound with no cure.

Pleadings. Plead the theories in the alternative — strict liability, negligence, breach of implied warranty of merchantability (U.C.C. § 2-314), breach of express warranty, and, where the facts support it, fraudulent concealment as the punitive hook. See Drafting a Federal Civil Complaint: A Practical Checklist and, in response, Answering a Complaint and Pleading Affirmative Defenses: A Practical Checklist — comparative fault, misuse, alteration, preemption, and repose are all waivable if unpleaded.

Discovery. The design-defect case is won and lost in the defendant's own files: design history, FMEA, hazard analyses, test logs, complaint databases, warranty claims, prior similar incidents (the "OSI" fight), and the change-order that explains why nine grams mattered more than an orifice tolerance. Sequence it with The Federal Discovery Toolkit: A Roadmap From Rule 26(f) to Sanctions, and take the corporate-designee deposition — the single most important event in most products cases — with The Federal Deposition Toolkit: From Notice to Trial Testimony.

Experts and dispositive motions. Expert disclosures under Fed. R. Civ. P. 26(a)(2), then the Daubert motion, then summary judgment — often briefed together, because excluding the causation expert usually is summary judgment. See Challenging an Expert Under Daubert and Rule 702: A Practical Checklist and Moving for Summary Judgment Under Rule 56: A Practical Checklist, with the whole pretrial arc mapped in The Civil Pretrial Toolkit: From Pleadings to Summary Judgment.

Trial. Products trials are demonstrative-heavy and instruction-driven: the verdict form's apportionment question and the design-defect instruction (consumer expectations? risk-utility? both?) decide more cases than any closing argument. Prepare with Preparing for Trial: A Pretrial Order and Trial Readiness Checklist and Federal Civil Trial Practice: From Final Pretrial Conference to Verdict.

Or don't try it. Most tort cases settle, and the forum choice — court, arbitration, or mediation — is itself strategic. See Choosing a Dispute-Resolution Forum: Litigation, Arbitration, and Mediation Compared.

The landscape as a working checklist

A gated audit of any tort or products matter. Do not pass a gate until it clears.

Gate 1 — Theory and law

  • [ ] Identify the governing state's law. Confirm it; do not assume.
  • [ ] Select the theory or theories: intentional, negligence, strict liability, warranty.
  • [ ] Confirm the state's design-defect test (consumer expectations, risk-utility, or both) and whether a reasonable alternative design is required.
  • [ ] Confirm the state's comparative-fault regime (pure, modified 50%, modified 51%, or contributory).
  • [ ] Calculate the statute of limitations and any statute of repose.

Gate 2 — Elements

  • [ ] Duty: is there one, and to this plaintiff? Any no-duty rule (rescue, economic loss, NIED)?
  • [ ] Breach: Hand-formula case, custom evidence, negligence per se, res ipsa?
  • [ ] Defect: which of the three categories, and what is the proof for each?
  • [ ] Causation: but-for or substantial factor; scope of liability; intervening causes.
  • [ ] Damages: economic, noneconomic, punitive-eligible?

Gate 3 — Preservation and regulatory

  • [ ] Preserve the exemplar product, unaltered, chain of custody documented.
  • [ ] Issue the litigation hold; suspend auto-deletion.
  • [ ] Assess the CPSC § 2064(b) (or NHTSA/FDA) reporting duty. The clock runs on information, not certainty.
  • [ ] Decide on recall; do not let the tort defense drive the safety decision.

Gate 4 — Insurance

  • [ ] Tender to every potentially triggered policy, in writing, immediately.
  • [ ] Identify all triggered policy years and the excess tower.
  • [ ] Flag "your product," "your work," and recall/sistership exclusions.
  • [ ] Review the reservation of rights.

Gate 5 — Parties and forum

  • [ ] Map the full chain of distribution and every component supplier.
  • [ ] Assess personal jurisdiction (Ford; Bristol-Myers Squibb) and removal/CAFA.
  • [ ] Assess preemption (Riegel, Wyeth, Mensing, Geier) as a threshold defense.
  • [ ] Assess aggregation: Rule 23 class, § 1407 MDL, or state consolidation.

Gate 6 — Proof

  • [ ] Retain experts early: engineering/design, human factors/warnings, medical causation, economics/life care.
  • [ ] Stress-test each expert against Rule 702 as amended (December 2023) before disclosure.
  • [ ] For a RAD: is it built, tested, costed, and manufacturable?
  • [ ] Collect prior similar incidents, complaint databases, and warranty data.

Gate 7 — Resolution

  • [ ] Value the case: compensatory range, punitive exposure under Gore/Campbell, cost of defense.
  • [ ] Model comparative-fault apportionment and joint-and-several exposure.
  • [ ] Choose the forum: trial, mediation, or arbitration.
  • [ ] Confirm the verdict form and jury instructions match the state's actual test.

Primary Authority

Restatements

  • Restatement (Second) of Torts §§ 8A (intent), 46 (IIED), 314 (no duty to rescue), 328D (res ipsa loquitur), 402A (strict products liability), 431–433 (substantial factor), 519–520 (abnormally dangerous activities)
  • Restatement (Third) of Torts: Liability for Physical and Emotional Harm §§ 3, 7 (duty), 14 (negligence per se), 20 (abnormally dangerous), 29 (scope of liability)
  • Restatement (Third) of Torts: Products Liability §§ 1, 2(a)–(c) (the three defect categories), 3, 4, 6(d) (learned intermediary), 10 (post-sale duty to warn), 17 (plaintiff's fault)
  • Restatement (Third) of Torts: Apportionment of Liability

Cases

Statutes and rules

A standing caution. Except for the federal statutes, rules, and preemption cases above, nearly everything in this toolkit is state law that varies. Caps, repose periods, comparative-fault bars, punitive-damages procedures, and premises-liability categories differ across the fifty states, and legislatures amend them regularly. Treat the framework as durable and every specific number as provisional.

Secondary Sources

  • Dan B. Dobbs, Paul T. Hayden & Ellen M. Bublick, The Law of Torts (the standard modern treatise)
  • Prosser and Keeton on the Law of Torts (the classic; still the reference point for common-law doctrine)
  • David G. Owen, Products Liability Law
  • Wright & Miller, Federal Practice and Procedure (for the Rule 23, Rule 26, and § 1407 machinery)

Related UpLaw Resources

Related Guides & Articles

Related Checklists

Related Toolkits

This toolkit is general legal information from UpLaw (uplaw.us), not legal advice, and does not create an attorney-client relationship. Tort and products liability law are overwhelmingly state law and vary substantially from jurisdiction to jurisdiction; damages caps, repose periods, and comparative-fault rules change frequently. Verify current requirements in your jurisdiction and consult qualified counsel before acting.