Within Witnesses
How Serious UFO Witness Reports Get Tested
France's GEIPAN model shows why investigators need structured testimony more than famous testimony.
On this page
- What structured witness questions capture
- Photos and videos as supporting material
- Why lack of data can keep a case unresolved
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Introduction
France’s official UFO investigation programme, GEIPAN, offers a useful example of how investigators try to separate a report’s evidential value from the identity of the person making it. Rather than giving extra weight to a celebrity or other high-profile witness, GEIPAN requires direct witnesses to complete a detailed technical questionnaire before a formal investigation begins. The aim is not to decide whether a witness is honest, but to determine whether enough reliable, structured information exists to analyse what was seen. This approach illustrates why serious investigations value consistent documentation over public reputation, making it especially relevant when comparing celebrity and ordinary UFO witnesses.
What structured witness questions capture
GEIPAN, a unit of the French space agency CNES, states that human testimony is central to its work but also recognises that memory alone is not enough. Every admissible investigation begins with a technical questionnaire designed to collect the essential facts needed for analysis. Only reports from one or more direct witnesses are normally investigated, and completing the questionnaire is a prerequisite for opening a case. [cnes-geipan.fr]cnes-geipan.frMission & GeipanGEIPAN only investigates phenomena reported by one or more direct witnesses of the observation. The witness must fulfil t…
The questionnaire functions as a credibility filter because it standardises information that might otherwise be omitted or remembered inconsistently. Rather than asking whether the witness is famous or persuasive, it seeks details such as:
- The precise date and time of the observation.
- The exact location and viewing direction.
- Weather and lighting conditions.
- Duration of the event.
- The apparent size, colour, brightness and movement of the object.
- The number and positions of witnesses.
- Whether the witness used binoculars, cameras or other equipment.
- Any conventional explanations already considered.
Collecting these details allows investigators to compare testimony with astronomical events, aircraft movements, meteorological conditions and other external records. A report with comprehensive observational data can therefore be examined much more rigorously than a dramatic but poorly documented account.
This explains why, within an investigative framework like GEIPAN’s, an unknown witness who carefully records observations may provide a more useful case than a celebrity recalling an unusual experience years later from memory alone.
Photos and videos as supporting material
GEIPAN’s procedures make an important distinction between testimony and supporting evidence. Sketches, photographs, videos and other detection material are encouraged because they may help reconstruct an event, but they supplement the questionnaire rather than replace it. A photograph without contextual information often cannot establish what was photographed, from where, under what conditions or with what camera settings. [cnes-geipan.fr]cnes-geipan.frMission & GeipanGEIPAN only investigates phenomena reported by one or more direct witnesses of the observation. The witness must fulfil t…
Similarly, GEIPAN’s admissibility rules indicate that observations based solely on photographs or videos, without a direct witness account meeting its reporting criteria, may not proceed through the normal investigation process. The programme therefore treats images as evidence that gains value when linked to documented eyewitness information rather than as standalone proof. [cnes-geipan.fr]cnes-geipan.fr· Indirect accounts (reported by third parties). · Observations noted solely in photos or videos. · Reports of observations…Read more…
This policy addresses a common misunderstanding in public UFO discussions. Viral images can attract enormous attention, especially when associated with well-known individuals, but investigators still need metadata, viewing conditions, independent testimony and opportunities to compare the imagery with ordinary explanations before drawing conclusions.
Why lack of data can keep a case unresolved
One of GEIPAN’s most informative practices is acknowledging that some cases remain unresolved not because they are necessarily extraordinary, but because there is insufficient information to reach a reliable conclusion.
Its published classification system distinguishes between:
- Category A: the phenomenon is identified.
- Category B: the phenomenon is probably identified.
- Category C: the phenomenon cannot be identified because available information is insufficient.
- Category D: the phenomenon remains unidentified after investigation despite sufficient available information. [cnes-geipan.fr]cnes-geipan.frenon not identified due to lack of data or information.Read more…
The existence of Category C demonstrates that missing or incomplete evidence is itself an analytical outcome. A vague description, uncertain timing, missing location details or absence of corroborating information can prevent investigators from confidently matching a sighting to aircraft, astronomical bodies or atmospheric phenomena. Rather than speculating, GEIPAN records these cases as unresolved due to inadequate data and notes that they may be revisited if new information emerges. [cnes-geipan.fr]cnes-geipan.frenon not identified due to lack of data or information.Read more…
This distinction is particularly relevant when evaluating celebrity UFO stories. Public recognition may preserve an account in popular culture, but if essential observational details were never recorded—or survive only through later recollection—the case may remain impossible to investigate thoroughly regardless of the witness’s prominence.
Why the questionnaire matters more than the witness
GEIPAN’s reporting model illustrates a broader investigative principle: credibility is strengthened through documentation, not status. The technical questionnaire creates a consistent framework in which every witness is expected to provide comparable information before investigators begin evaluating explanations.
That approach reduces the influence of factors that often shape public discussion, including fame, media attention and personal reputation. A celebrity witness may attract headlines, while an ordinary observer may receive little publicity, yet both are assessed against the same practical questions: What exactly was observed? Under what conditions? How well can the event be reconstructed? What independent evidence exists?
In that sense, GEIPAN’s questionnaire acts less as a test of honesty than as a filter for analytical usefulness. Reports containing detailed, structured observations provide investigators with material that can be checked against external records, whereas incomplete reports—however sincere or high-profile the witness—may simply lack the information needed for a meaningful investigation.
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Endnotes
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Source: cnes-geipan.fr
Link: https://www.cnes-geipan.fr/en/missions-methodes-et-resultatsSource snippet
Mission & GeipanGEIPAN only investigates phenomena reported by one or more direct witnesses of the observation. The witness must fulfil t...
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Source: cnes-geipan.fr
Link: https://www.cnes-geipan.fr/en/node/58788Source snippet
MethodologyGEIPAN only investigates phenomena reported by one or more direct witnesses of the observation. The witness must fulfil the te...
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Source: cnes-geipan.fr
Link: https://www.cnes-geipan.fr/en/faq-pageSource snippet
FAQTo provide your testimony, you are invited to fulfil our technical questionnaire (QT), reachable via the "TEMOIGNER" tab on the websit...
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Source: cnes-geipan.fr
Link: https://www.cnes-geipan.fr/en/node/428Source snippet
· Indirect accounts (reported by third parties). · Observations noted solely in photos or videos. · Reports of observations...Read more...
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Source: cnes-geipan.fr
Link: https://www.cnes-geipan.fr/en/what-did-i-see/step-1Source snippet
Understanding a PhenomenonThe witness then receives an acknowledgment of receipt, confirming that the testimony has been processed and of...
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Source: cnes-geipan.fr
Link: https://www.cnes-geipan.fr/en/node/412Source snippet
enon not identified due to lack of data or information.Read more...
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Source: cnes-geipan.fr
Link: https://www.cnes-geipan.fr/en/node/58794Source snippet
IGNER" tab on the website's homepage.Read more...
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Source: cnes-geipan.fr
Link: https://www.cnes-geipan.fr/enSource snippet
Questionnaire Technique · République Française CNES. Geipan. Groupe d'études et d'informations sur...Read more...
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Source: cnes.fr
Link: https://cnes.fr/en/projects/geipanSource snippet
7 Jul 2025 — GEIPAN, the French UAP research and information group created by CNES in 1977, collects, analyses and archives information o...
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Source: geipan.fr
Link: https://www.geipan.fr/sites/default/files/15_VALLEE_full.pdfSource snippet
UNIDENTIFIED AERIAL PHENOMENA A Strategy for...by JF Vallee · Cited by 1 — Note that both the GEiPAN database and UFOCAT treat every rep...
Additional References
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Department of Flying SaucersUFO reports still pour in daily either from gendarmes on the beat or a network of 100 volunteer investigators...
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France has an official **UFO office** (GEIPAN) inside the...GEIPAN publishes data on UFO sightings in France, including witness testimon...
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Members of the public can file a UAP sighting report through a form that is...
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Source: pandasppn.org
Link: https://www.pandasppn.org/research-library/questionnaire-reliability/Source snippet
liability in assessing symptom severity and comorbidities.Read more...
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Source: pubmed.ncbi.nlm.nih.gov
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and validity of a newly developed PANDAS...by A Bleibach · 2024 · Cited by 2 — This study aimed to examine the reliability and validity...
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Source: researchgate.net
Link: https://www.researchgate.net/publication/369507030_GEIPAN_classification_with_text_mining_and_machine_learningSource snippet
In addition, although efforts have...Read more...
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Source: ufouap.net
Title: trans en provence ufo case
Link: https://www.ufouap.net/en/cases/trans-en-provence-ufo-caseSource snippet
Trans-en-Provence UFO caseFrance / 1981 / UNRESOLVED. Trans-en-Provence UFO case. A French trace case investigated by the official GEPAN/...
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Reproducibility of Pansharpening Methods and Quality...by A Arienzo · 2021 · Cited by 24 — In this work, we investigate whether the perf...
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