Within GEIPAN
How GEIPAN Revises UFO Case Classifications Over Time
Focuses on how GEIPAN updates past case classifications when new information or analysis becomes available.
On this page
- Process of re evaluating cases
- Historical examples of D to B reclassifications
- Effects on statistics and public perception
Page outline Jump by section
Introduction
In the context of official unidentified aerospace phenomena records, case reclassification in the Groupe d’Études et d’Informations sur les Phénomènes Aérospatiaux Non‑identifiés (GEIPAN) database refers to the ongoing process by which previously investigated cases can be reassessed and assigned a different resolution category when new data, analytic tools, or expertise becomes available. This mechanism ensures that the database remains a living resource rather than a static archive of first impressions. Reclassification affects how cases are understood publicly and statistically, as well as the trustworthiness of the catalogue for long‑term research and trend analysis. GEIPAN’s approach reflects a deliberate balance between rigorous evidential standards and a commitment to updating judgements when warranted by new information. [Geipan]geipan.frClassification | GEIPANGeipanClassification | GEIPAN…
How GEIPAN Revisits and Revises Case Classifications
At the heart of GEIPAN’s database is its classification methodology, which assigns each reported observation to one of several categories: A (identification achieved), B (probable identification), C (insufficient data), and D (unexplained after investigation) — with sub‑categories D1 and D2 used for unexplained phenomena of varying consistency and strangeness. The original classification rests on two key analytic dimensions: the residual strangeness of the observation after comparison with known explanatory hypotheses, and the consistency of the data — how many reliable data points exist and how coherent they are. [Geipan]geipan.frClassification | GEIPANGeipanClassification | GEIPAN…
Reclassification occurs when new information or analysis alters those two parameters in a way that materially changes the initial judgement. This might include additional witness testimony, better photographic evidence, radar data, meteorological context, or technological tools that enable the resolution of ambiguities. GEIPAN’s documentation states explicitly that “a revisit, or a new analysis, of cases C and D may be conducted if new information related to these cases is communicated to GEIPAN after the initial investigation,” and that “D cases need periodical re‑evaluation.” This denotes an institutional mechanism for updating case status beyond the initial closing of an investigation. [Geipan]geipan.frGeipanStatistics | GEIPANJanuary 27, 2026…
Operationally, reclassification can follow both structured checks and ad hoc triggers:
- Triggered by new witness input or evidence: if witnesses supply additional photos, videos, or clarification that were not available initially, a case once deemed insufficient or unexplained can be analysed again.
- Methodology improvements: advances in analytical methods — for example radar interpretation, atmospheric modelling, or cognitive interviewing for witness reliability — strengthen the evidential basis and sometimes resolve what was previously ambiguous.
- Periodic systematic review: certain unexplained (D) cases are flagged for reassessment on a scheduled basis, helping to incorporate broader contextual knowledge gained over time. [Geipan]geipan.frdeux nouveaux cas d1Date de publication 18 décembre 2014 DEUX NOUVEAUX CAS RÉCENTS D'OBSERVATION CLASSÉS "D1" Date de publicati…
Historical Examples of Reclassification
Although GEIPAN does not routinely publish exhaustive lists of reclassification events, there are notable indicators of this process in the historical record:
- Reappraisal of Old D Cases: According to GEIPAN’s own reporting, over the past decade the office “sped up the reappraisal of old D cases with 50 of them re‑investigated and explained in 2017.” This reflects a concentrated effort to revisit cases previously left in the unexplained category, often resulting in their reclassification to A or B once new data or perspective resolved key uncertainties. [Geipan]geipan.frCASE SEARCH + Keywords [Input] Classification [Select] [Input]0 [Input]Select all * * * * [Input]A * […
- Updated Trend Statistics: GEIPAN’s published dynamic statistics show a decline in the overall percentage of unexplained cases (category D) over time — alongside rising proportions of A and B classifications. While part of this trend arises from new case influxes, the reclassification of older unresolved cases contributes materially to these shifts, demonstrating the cumulative effect of the review process on the catalogue’s overall composition. [Geipan]geipan.frCASE SEARCH Image: blue arrow swipe Nouveaux CAS (15) Revised cases (228) [Select] CASE LIST 12/01/2026 PA…
Cases initially tagged as D or C can, upon re‑examination, be found consistent with mundane explanations — for example misidentified aircraft, atmospheric phenomena, or celestial bodies — and be updated accordingly. Conversely, in rare situations, new evidence could potentially increase a case’s strangeness score, though such upwards reclassification is much less common in GEIPAN’s practice.
Effects on Statistics and Public Perception
Reclassification has three major effects on both the internal statistics of the GEIPAN database and its external perception:
- Improved Accuracy of the Archive: Regularly updating case status ensures that statistical breakdowns (percentages of A, B, C, D cases) reflect current understanding rather than historical inertia. This makes the database more reliable for researchers seeking temporal or comparative trends in unidentified aerospace phenomena. [Geipan]geipan.frSelect] [Input] [Input] [Input] RECHERCHE DE CAS + Mots Clefs [Input] Classification [Select] [Input]0…
- Public Trust and Transparency: GEIPAN’s willingness to revisit and revise classifications reinforces its public credibility. Explaining that a previously “unidentified” case is now “identified” under new evidence demonstrates a commitment to evidence‑based judgements rather than dogmatic classification. From a public standpoint, this transparency reduces speculation and emphasises the role of empirical evidence in understanding UAP reports. [connexionfrance]connexionfrance.comNot that it isconnexionfranceInside France's 'UFO Bureau': 'we explain what people…February 7, 2023 — 7 Feb 2023 — D, the highest rank (99 cases or…
- Contextualising Unexplained Cases: By actively refining categorizations, GEIPAN avoids indefinite classification of poorly documented reports as “unexplained.” Instead, it distinguishes between genuinely ambiguous phenomena and those that lack sufficient evidence — a distinction that is significant for both scientists and interested members of the public evaluating the database’s unexplained subset. [Geipan]geipan.frThe most difficult phenomenon to explain…
In sum, GEIPAN’s reclassification process functions as a form of quality control and scientific reassessment. It reflects a broader trend in UFO/UAP catalogues toward dynamic, evidence‑responsive records, demonstrating that unresolved cases are not end points but stages in an evolving understanding of aerial phenomena. [Geipan]geipan.frRECHERCHE DE CAS LISTE DES CAS 12/01/2026 PAPEETE (987) 12.01.2026 Classification: A Département: Polynés…
Amazon book picks
Further Reading
Books and field guides related to How GEIPAN Revises UFO Case Classifications Over Time. Use these as the next step if you want deeper reading beyond the article.
UFOs
Provides official case context and the seriousness of reassessing unresolved UAP reports.
The UFO Experience
Directly relevant to how case judgements can change as evidence and classification standards are applied.
UFOs and Government
Strongly fits reclassification because it traces how government UFO investigation methods and conclusions evolved.
The Report on Unidentified Flying Objects
Shows historical case review and the changing interpretation of UFO reports within an official programme.
eBay marketplace picks
Marketplace Samples
Example marketplace items related to this page. Use the search link to explore similar finds on eBay.
References
- Classification details and reclassification mechanism described on GEIPAN’s official methodology page. [Geipan]
- English summary of classification methodology including condition for reclassification. [Geipan]
- Historical note on reappraisal of old unexplained cases. [Geipan] [* Dynamic statistics reflecting shifts in categorisation over time. Geipan](#endnote-5 “
Source snippet
By Classification By Year of Observation By Region By Department Par Phénomène Distribution of Observati")...
- Commentary on public expectations and classification clarity. [connexionfrance](#endnote-4 “
Source snippet
connexionfranceInside France's 'UFO Bureau': 'we explain what people...February 7, 2023 — 7 Feb 2023 — D, the highest rank (99 cases or...")...
Endnotes
-
Source: geipan.fr
Title: Classification | GEIPAN
Link: https://geipan.fr/fr/node/58787Source snippet
GeipanClassification | GEIPAN...
-
Source: geipan.fr
Title: Classification | GEIPAN
Link: https://www.geipan.fr/en/node/58787Source snippet
GeipanClassification | GEIPAN...
-
Source: geipan.fr
Link: https://www.geipan.fr/en/statsSource snippet
GeipanStatistics | GEIPANJanuary 27, 2026...
Published: January 27, 2026
-
Source: connexionfrance.com
Title: Not that it is
Link: https://www.connexionfrance.com/news/inside-frances-ufo-bureau-we-explain-what-people-have-seen/189460Source snippet
connexionfranceInside France's 'UFO Bureau': 'we explain what people...February 7, 2023 — 7 Feb 2023 — D, the highest rank (99 cases or...
Published: February 7, 2023
-
Source: geipan.fr
Title: deux nouveaux cas d1
Link: https://www.geipan.fr/fr/actualites/deux-nouveaux-cas-d1Source snippet
Date de publication 18 décembre 2014 DEUX NOUVEAUX CAS RÉCENTS D'OBSERVATION CLASSÉS "D1" Date de publicati...
-
Source: geipan.fr
Link: https://www.geipan.fr/en/search/casSource snippet
CASE SEARCH + Keywords [Input] Classification [Select] [Input]0 [Input]Select all * * * * [Input]A * [...
-
Source: geipan.fr
Link: https://www.geipan.fr/en/search/cas?page=%2C0&undefined=Source snippet
CASE SEARCH Image: blue arrow swipe Nouveaux CAS (15) Revised cases (228) [Select] CASE LIST 12/01/2026 PA...
-
Source: geipan.fr
Link: https://www.geipan.fr/fr/recherche/casSource snippet
[Select] [Input] [Input] [Input] RECHERCHE DE CAS + Mots Clefs [Input] Classification [Select] [Input]0...
-
Source: geipan.fr
Link: https://www.geipan.fr/en/node/440Source snippet
The most difficult phenomenon to explain...
-
Source: geipan.fr
Link: https://geipan.fr/fr/recherche/cas?page=%2C0Source snippet
RECHERCHE DE CAS LISTE DES CAS 12/01/2026 PAPEETE (987) 12.01.2026 Classification: A Département: Polynés...
-
Source: geipan.fr
Link: https://www.geipan.fr/en/node/Source snippet
GEIPAN* No. GEIPAN does not involve in a security topic nor a sky and space awareness or alert service. * For any questions or alertsrega...
-
Source: geipan.fr
Link: https://geipan.fr/en/search/cas?page=%2C13Source snippet
CASE SEARCH CASE LIST 03/09/2024 QUIEVY (59) 03.09.2024 Classification: B Department: Nord Date of update...
-
Source: geipan.fr
Link: https://www.geipan.fr/en/recherche/cas/tab?field_classification_des_cas_target_id%5B0%5D=14&field_classification_des_cas_target_id%5B1%5D=15&field_classification_des_cas_target_id%5B2%5D=16&field_document_existe_ou_pas_value=All&field_type_de_cas_target_id=All&order=field_classification_des_cas&page=5&select-category-export=nothing&sort=ascSource snippet
CASE SEARCH + Keywords [Input] Classification [Select] Department [Input] [Input] Advanced search Obser...
-
Source: skepticalinquirer.org
Link: https://skepticalinquirer.org/wp-content/uploads/sites/29/2009/01/p47.pdf?ref=thegalacticmind.comSource snippet
An Assessment of Thirty Years of Official Studies in FranceA detailed, critical re-examination of the main cases in three decades of 'off...
-
Source: youtube.com
Link: https://www.youtube.com/watch?v=hn2xTieploUSource snippet
The UFO Office • FRANCE 24...
-
Source: cnes-geipan.fr
Link: https://www.cnes-geipan.fr/en/node/58787Source snippet
GeipanClassificationToday, the GEIPAN has sped up the reappraisal of old D cases with 50 of them re-investigated and explained in 2017...
-
Source: cnes-geipan.fr
Link: https://www.cnes-geipan.fr/index.php/en/statsSource snippet
Statistics | GEIPANOctober 21, 2025 — By Classification By Year of Observation By Region By Department Par Phénomène Distribution of Obse...
Published: October 21, 2025
-
Source: Wikipedia
Link: https://en.wikipedia.org/wiki/GEIPANSource snippet
GEIPANGEIPAN is clearly focused on UFO study, but UAP (PAN in French) is meant to cover a much broader area than UFO (OVNI in French)...
-
Source: cnes-geipan.fr
Title: How does GEIPAN classify observation cases?
Link: https://www.cnes-geipan.fr/en/node/412Source snippet
| GEIPANThe classification process is done according a quantitative and qualitative assessment of two parameters: the consistency (C) of...
-
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]({{ 'archives/' | relative_url }}) information o...
-
Source: newspaceeconomy.ca
Link: https://newspaceeconomy.ca/2025/07/29/geipan-frances-uap-investigation-unit/Source snippet
GEIPAN: Frances UAP Investigation Unit - New Space Economy29 Jul 2025 — Many older D cases have been re‑examined and explained over time...
Additional References
-
Source: facebook.com
Link: https://www.facebook.com/TheFrenchHistoryPodcast/posts/a-drawing-from-the-files-at-the-french-ufo-department/1337099231754482/Source snippet
A drawing from the files at the French UFO departmentThe case has been classified as a 'Class D' case, which are the unexplained cases in...
-
Source: reddit.com
Link: https://www.reddit.com/r/todayilearned/comments/1qa0lyb/til_that_france_has_a_dedicated_unit_to_finding/Source snippet
TIL that France has a dedicated unit to finding UFO's. The...The explained UFOs are broken down such as: Airplanes, helicopters and bli...
-
Source: cnes-geipan.fr
Link: https://www.cnes-geipan.fr/en/missions-methodes-et-resultatsSource snippet
EN-OUCHE (27) 23.02.2016, involves four witnesses, three of them in a car driving on...
-
Source: reddit.com
Link: https://www.reddit.com/r/UFOs/comments/nxkne3/france_ufo_situation_classification_and_list_of/Source snippet
France: UFO situation, classification and list of sightings.11 Jun 2021 — In 2007 after 30 years of collecting reports on UAPs, GEIPAN de...
-
Source: facebook.com
Link: https://www.facebook.com/209times/posts/the-war-department-releases-additional-classified-ufo-files-the-war-department-f/1422472709921650/Source snippet
The shocking videos include a recent...Read more...
-
Source: youtube.com
Title: Governments Using AI To Decode Massive UFO Databases | WION Podcast
Link: https://www.youtube.com/watch?v=adCsqd_-M94Source snippet
UAP data released: Astrophysicist Avi Loeb breaks down declassified records | FOX 10 Talks...
-
Source: cnes-geipan.fr
Title: evolution classification des cas
Link: https://www.cnes-geipan.fr/fr/actualites/evolution-classification-des-casSource snippet
[Select] [Input] [Input] [Input] Date de publication 10 décembre 2008 EVOLUTION DE LA CLASSIFICATION DES C...
-
Source: youtube.com
Title: UFOs, aliens: why is Trump declassifying?
Link: https://www.youtube.com/watch?v=d1Olr4FyNbsSource snippet
Governments Using AI To Decode Massive UFO Databases | WION Podcast...
-
Source: youtube.com
Title: The UFO Office • FRANCE 24
Link: https://www.youtube.com/watch?v=Ygb1vphH1q0Source snippet
UFOs, aliens: why is Trump declassifying? - C dans l'air - 04/25/2026...
-
Source: youtube.com
Link: https://www.youtube.com/watch?v=ur0QX1eGCQI
Topic Tree