In the context of civil litigation, class actions, and complex legal proceedings, PFS stands for Plaintiff Fact Sheet. A Plaintiff Fact Sheet is a standardized, court-mandated questionnaire and discovery document that individual plaintiffs are legally required to complete and submit during the early pre-trial discovery phase. Particularly common in multidistrict litigation (MDL) and consolidated mass tort proceedings involving pharmaceuticals or medical devices, the PFS replaces or supplements traditional interrogatories, requiring plaintiffs to disclose detailed personal data, medical histories, exposure timelines, injury specifics, and signed records releases.