A settlement demand in a mass tort is a different document than a single-plaintiff demand letter, even though both aim at the same outcome. Mass torts typically involve hundreds or thousands of claimants against a common defendant over a shared product, drug, or exposure, and the defense is not evaluating one claim in isolation — it is evaluating an inventory. A demand written as if it were a single case, with no reference to that structure, tends to be read as uninformed rather than aggressive.

This guide covers how mass tort demands are typically organized: around a common set of general causation and liability facts, an injury matrix that tiers claimants by severity, and often a reference to bellwether trial results or established settlement matrices from prior negotiated resolutions. It is an educational explainer of common practice, not a template to be used without counsel review, and not legal advice.

Mass tort litigation typically splits causation into two layers. General causation is the question of whether the product, drug, or exposure is capable of causing the type of harm alleged at all — usually established once across the whole litigation through expert testimony, and often already resolved by the time individual demands go out. Individual causation is whether this specific claimant's injury was, in fact, caused by that exposure.

A well-built demand does not re-litigate general causation from scratch. It references the established general causation record (studies, prior rulings, regulatory findings) and then focuses its individualized argument on the specific claimant's exposure history, medical records, and differential diagnosis. Conflating the two wastes the letter's persuasive weight on ground that is often already settled.

Most mass tort resolutions, whether through a global settlement or an informal claims process, sort claimants into severity tiers rather than valuing each claim from scratch. A matrix typically groups claimants by objective criteria — diagnosis category, treatment received, permanency, age at exposure — and assigns a base value or range to each tier, then adjusts for enhancing or reducing factors.

In an active mass tort with bellwether trials already tried, or a prior negotiated settlement matrix from a related litigation, those results are usually the strongest available anchor for value — far stronger than a first-principles damages calculation, because the defense has already priced its own risk against them.

Cite specific bellwether verdicts or settlement tiers where they exist, and explain how this claimant's facts compare to the claimants in those reference points — more severe, less severe, stronger causation, weaker causation. A demand that ignores established anchors invites a response anchored on numbers you never addressed.

Beneath the shared litigation-wide argument, each demand still needs an individualized factual core: exposure history, complete medical chronology, diagnosis, treatment, current status, and damages specific to that claimant. Sloppy or incomplete individual files are a common reason mass tort claims get valued at the bottom of their tier regardless of true severity.

Mass tort demands typically move through claims administrators, defense liaison counsel, or a settlement program rather than a single adjuster, and timelines are usually longer than in single-plaintiff practice. State a clear, reasonable response deadline and identify the specific next step (claims portal submission, negotiation call, mediation date) so the demand reads as part of an established process rather than a one-off letter into the void.