Systematic manual review of the family-tracing bulletins published by the ten institutions included in the dataset. Each bulletin was transcribed into a standardised template. Bulletins are heterogeneous: no common standard governs them, and each institution publishes a different subset of fields, so many variables are unavailable for entire states., [EN] This dataset compiles 1,405 cases of deceased persons in Mexico who were identified but not returned to their families; the legal category under Mexican law is Identified Deceased Persons Not Claimed. All of them were recovered as unidentified and were subsequently identified by forensic services through fingerprint comparison against the records of the National Electoral Institute (INE). Because this type of identification is completed within the State, the family must afterwards be located in order to be notified. The information was extracted from family-tracing bulletins (fichas de búsqueda de familia) published on open institutional platforms by the Jalisco Institute of Forensic Sciences, the Directorate of Expert and Forensic Sciences Services of Chihuahua, and the state prosecutor's offices of Mexico City, Colima, Guanajuato, Morelos, Puebla, Quintana Roo, Sinaloa and Veracruz. The data cut-off is 21 July 2026. Institutions sometimes withdraw records once families come forward and sometimes leave them posted, so the presence of a record indicates nothing either way, and none reports which of these persons have already been restored to their relatives., Each record contains up to 30 variables covering the state and municipality of finding, year of admission to the forensic service, state of birth, year of birth, age, sex, physical description (build, height, hair, skin, dentition, facial hair, eyes) and state of electoral domicile. Entries correspond to admissions to forensic services registered between 2005 and 2026. Following the requirements of the CSIC Ethics Committee, all directly and indirectly identifying fields were suppressed and marked as ANONIMIZADO (ANONYMISED): names, CURP, full dates, municipality of birth and of electoral domicile, address of finding, case file numbers, and individualising marks such as scars, tattoos, clothing and personal effects. Dates are published at year level only, as full dates are quasi-identifiers, and absent values are marked S/D. An accompanying glossary documents all markers, variables and methodological decisions., The dataset was assembled to systematise patterns of disappearance that remain largely unexamined, under Work Package 2, Objective 1 of the TRACETHEM project (Tracing the Lost: Understanding and Addressing Disappearances in Contemporary Mexico), a Marie Skłodowska-Curie Action hosted at ILLA-CSIC, GA 101202107, February 2026 to January 2028. It supports the analysis of demographic profiles, geographic mobility between state of birth, place of residence and place of finding, and the differences between state institutions in the publication of forensic information., [ES] The dataset was assembled to systematise patterns of disappearance that remain largely unexamined, under Work Package 2, Objective 1 of the TRACETHEM project (Tracing the Lost: Understanding and Addressing Disappearances in Contemporary Mexico), a Marie Skłodowska-Curie Action hosted at ILLA-CSIC, GA 101202107, February 2026 to January 2028. It supports the analysis of demographic profiles, geographic mobility between state of birth, place of residence and place of finding, and the differences between state institutions in the publication of forensic information., La información fue extraída de las fichas de búsqueda de familia publicadas en plataformas institucionales de acceso público por el Instituto Jalisciense de Ciencias Forenses, la Dirección de Servicios Periciales y Ciencias Forenses de Chihuahua, y las fiscalías generales de justicia de Ciudad de México, Colima, Guanajuato, Morelos, Puebla, Quintana Roo, Sinaloa y Veracruz. La fecha de corte es el 21 de julio de 2026. Las instituciones a veces retiran los registros cuando las familias se presentan y a veces los dejan publicados, de modo que la permanencia de una ficha no indica nada al respecto, y ninguna informa cuáles de estas personas ya fueron restituidas., Cada registro contiene hasta 30 variables: entidad y municipio de hallazgo, año de ingreso al servicio forense, entidad de nacimiento, año de nacimiento, edad, sexo, descripción física (complexión, estatura, cabello, piel, dentadura, vello facial, ojos) y entidad del domicilio electoral. Los casos corresponden a ingresos a los servicios forenses registrados entre 2005 y 2026. Conforme a los requerimientos del Comité de Ética del CSIC, todos los campos identificadores directos e indirectos fueron suprimidos y marcados como ANONIMIZADO: nombres, CURP, fechas completas, municipio de nacimiento y del domicilio electoral, dirección de hallazgo, números de carpeta de investigación y marcas individualizantes como cicatrices, tatuajes, prendas y objetos. Las fechas se publican solo a nivel de año por ser cuasi-identificadores, y los datos ausentes se marcan como S/D. Un glosario adjunto documenta todos los marcadores, variables y decisiones metodológicas., El conjunto de datos fue construido para sistematizar patrones de desaparición que permanecen en gran medida inexplorados, en el marco del Paquete de Trabajo 2, Objetivo 1 del proyecto TRACETHEM (Tracing the Lost: Understanding and Addressing Disappearances in Contemporary Mexico), Acción Marie Skłodowska-Curie con sede en el ILLA-CSIC, GA 101202107, febrero de 2026 a enero de 2028. Permite analizar perfiles demográficos, movilidad geográfica entre entidad de nacimiento, lugar de residencia y lugar de hallazgo, y las diferencias entre instituciones estatales en la publicación de información forense., European Union, Horizon Europe, Marie Skłodowska-Curie Actions, Postdoctoral Fellowship, Grant Agreement 101202107, project TRACETHEM (Tracing the Lost: Understanding and Addressing Disappearances in Contemporary Mexico), hosted at the Institute of Language, Literature and Anthropology (ILLA), Spanish National Research Council (CSIC), February 2026 to January 2028., No