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Report a fake

Alert OIMAP to a forged document or artwork: useful information, handling and follow-up.

Updated : October 28, 2026· 3 min read

A report that protects all parties

Saint Jerome and the Lion (From the former Church of St. Peter in Erfurt), Tilman Riemenschneider (c. 1495)
Saint Jerome and the Lion (From the former Church of St. Peter in Erfurt), Tilman Riemenschneider (c. 1495)

Forged certificate, fabricated provenance, misappropriated OIMAP number, counterfeit artwork: every report strengthens the protection of the market. The form on this page allows you to submit the facts to the Organization, confidentially if you wish.

Before reporting, verify the document by number or by QR code. For a stolen item, use the BIOP report instead.

  • Fake
  • Report
  • Fraud

Reporting a forgery in figures

24 hIndicative acknowledgement of receipt
2Types of report
100%Confidentiality offered
1,900BIOP alerts since 2012 (indicative)

Source: OIMAP General Secretariat.

Breakdown

Forged documentCertificates, licences
Misappropriated numberFraudulent use
Counterfeit artworkCopy presented as an original

Indicative breakdown of the grounds for reporting.

What can be reported

Three situations are covered: a document that imitates an OIMAP certificate, an OIMAP number used for the wrong artwork, or an artwork for which there are serious grounds to believe it is counterfeit.

Commercial disputes over the quality of an authentic artwork fall under a different procedure, presented in the arbitration section.

The Antechamber of the Palace of Justice, Paris, Charles Meryon (1855)
The Antechamber of the Palace of Justice, Paris, Charles Meryon (1855)
Portrait of a Couple (c. 1580–88)
Portrait of a Couple (c. 1580–88)
Sketches in Belgium and Germany, Volume I: Hall of Justice of the Magistrates du Franc, Bruges, Louis Haghe (1840)
Sketches in Belgium and Germany, Volume I: Hall of Justice of the Magistrates du Franc, Bruges, Louis Haghe (1840)

Useful information

Describe the facts precisely: date, place, persons involved, nature of the document, OIMAP number if any. Attach photographs, a copy of the document and, if possible, the result of the online verification.

The better documented the report, the faster it can be handled. However, a mere suspicion may also be reported: the Secretariat's experts will sort it out.

Preserving the evidence

Never destroy or alter the suspect document. Keep the original, the messages exchanged with the seller, invoices and screenshots. These items may be passed on to the competent authorities.

Avoid confronting the person concerned yourself. A discreet report preserves the possibility of an investigation.

Handling by the Organization

The service receives the report, acknowledges receipt within twenty-four hours (indicative), then analyses the document with the Certification Directorate. If the forgery is confirmed, the number concerned is revoked or marked as misappropriated in the Registry.

The Organization may then alert the national authorities and, where appropriate, circulate an alert to accredited auction houses, without mentioning the name of the person reporting.

Information to provide

Contents of a report
ElementExampleRequired
Nature of the documentCertificate of authenticityYes
OIMAP numberOIMAP-2026-004281If available
CircumstancesSale offer, seller's emailYes
AttachmentsPhotographs, copiesRecommended
Contact detailsContact emailOptional

Milestones

  1. Report

    The form is submitted.

  2. Acknowledgement

    The Secretariat confirms receipt.

  3. Analysis

    Comparison with the registries.

  4. Follow-up

    Revocation or referral to the authorities.

Theft or loss: a separate service

Relief Portrait Head of the Emperor Balbinus (c. 238 CE)
Relief Portrait Head of the Emperor Balbinus (c. 238 CE)
Dr. James Stuart; Mary Campbell Stuart, Gilbert Stuart (c. 1815)
Dr. James Stuart; Mary Campbell Stuart, Gilbert Stuart (c. 1815)
View of  the Château of Pierrefonds, François-Louis Français (c. 1870)
View of the Château of Pierrefonds, François-Louis Français (c. 1870)

Anonymous or named report

The Calumny of Apelles, Giorgio Ghisi (1560)

Anonymous

No contact details
  • Maximum protection
  • No reply possible
  • Limited follow-up

Discreet.

Bidri Hookah Bowl with Roses (c. 1650s)

Named and confidential

With contact details
  • Exchange possible
  • Identity protected
  • File follow-up

Effective.

Report a fake

  1. Gather the evidence

    Document, messages, photographs.

  2. Verify online

    By number or QR code.

  3. Fill in the form

    With the precise facts.

  4. Await the acknowledgement

    Within twenty-four hours.

Before sending

An accredited expert (example)

Lace Towel End (c. 1700s–1800s)
« Reports from collectors allow us to identify recurring patterns, for example the same forged certificate presented in several countries. »
Nadia Benali, accredited expert (example)

Glossary

Fake
Forged document or object.
Counterfeiting
Imitation of an artwork presented as authentic.
Misappropriation
Improper use of an identifier.
Requisition
Official request from a judicial authority.

Confidentiality and protection

The person reporting may request anonymity with respect to third parties. Their identity is passed on only to judicial authorities and only upon requisition. Data are kept for the time necessary for the investigation.

A report made in good faith does not engage the liability of its author, even if the investigation ultimately concludes that there was no forgery.

Frequently asked questions

Is my report public?

No, it is handled confidentially.

Do I have to prove the forgery?

No, a serious suspicion is sufficient.

How long for a reply?

An acknowledgement within twenty-four hours, then an analysis depending on complexity.

How do I contact the Secretariat?

Through the online form.

Useful documents

Contacts

The Grotto of Posillipo, Hubert Robert (c. 1769)
The Grotto of Posillipo, Hubert Robert (c. 1769)
General SecretariatParis — Headquarters+33 1 00 00 00 00secretariat@oimap.exampleMonday to Friday, 9 am – 5 pm

BIOP alerts

Nymphs and a Satyr (Amor Vincit Omnia), Nicolas Poussin (c. 1625–27)

View the published alerts.

BIOP alerts
Image credits (17)
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