The Ummo correspondence

Record summary

Beginning in the late 1950s, Spanish recipients received letters and symbols allegedly from inhabitants of the planet Ummo, producing a large contactee dossier involving cosmology, science, social theory, and unusual markings. The material is valuable for comparing anonymous revelation, document circulation, technical vocabulary, and community authentication. Later admissions and investigations strongly support a human hoax or elaborate fabrication, although attribution and chronology have been debated. Researchers should distinguish early reports from later compilations and retrospective claims by participants.