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Approved auction houses

The directory of auction houses approved by OIMAP and their due diligence obligations.

Updated : October 28, 2026· 4 min read

An approval for safer sales

The Victory Banquet: from Battle Scenes of the Quelling of Rebellions in the Western Regions, with Imperial Poems (c. 1765–74; poem dated 1760)
The Victory Banquet: from Battle Scenes of the Quelling of Rebellions in the Western Regions, with Imperial Poems (c. 1765–74; poem dated 1760)

An approved auction house undertakes to verify the provenance of lots, to consult the BIOP database before each sale and to cooperate with the authorities. The approval is issued by the OIMAP Desk.

This page presents the principle of approval, the public directory and the obligations. The procedure is described in the Desk and the general framework in Market.

  • Auction houses
  • Approval
  • BIOP

Approved auction houses in figures

€450Sale approval (indicative)
5 daysProcessing time
48,200Works searchable in BIOP
24 hProcessing of a report

Source: OIMAP General Secretariat.

Breakdown

Painting38%
Contemporary art22%
Furniture and other18%
Sculpture14%
Tribal art8%

Segments of the global market in 2024.

What approval means

Approval attests that an auction house applies the Organization's due diligence rules. It is neither a label of commercial quality nor a guarantee on each lot, but a commitment of method: verify, document, report.

It is issued for one year and is renewable. The Desk processes it in five working days when the file is complete, at an indicative fee of €450.

Vanity Case (Nécessaire) (c. 1760)
Vanity Case (Nécessaire) (c. 1760)
Interior Drawer for Cabinet, André-Charles Boulle (c. 1690)
Interior Drawer for Cabinet, André-Charles Boulle (c. 1690)
The Four Markets:  The Fruit Market, Richard Earlom (1775)
The Four Markets: The Fruit Market, Richard Earlom (1775)

The house's obligations

Before each sale, the house consults the BIOP database for lots presenting a risk. It keeps provenance documents, invoices and certificates for the period set by the applicable regulations.

In case of doubt, it suspends the sale of the lot, informs the consignor and alerts the Organization. The reporting of a theft or loss is handled within 24 hours.

What the Organization offers in return

Approved houses gain access to a professional area: easier BIOP consultation, notifications on alerts, documentation of the guidelines, invitations to Academy training.

They may also display their approval in their catalogues, according to the rules of use communicated with the decision.

The public directory

The directory of approved auction houses can be consulted by anyone. It gives the name, city, specialties and validity date of the approval. A buyer or a seller can thus check in a few seconds that a house is indeed approved.

The directory is updated as soon as an approval is issued, suspended or withdrawn. If you notice a discrepancy, report it to the Organization through the contact form.

Obligations at each stage of the sale

Due diligence throughout the sale
StageObligationEvidence kept
Receipt of the lotIdentify the consignorProof of identity, mandate
CataloguingVerify provenanceProvenance file
Before the saleConsult the BIOPRecord of the consultation
SaleRespect restrictionsMinutes
After the saleKeep the documentsSale archives

Milestones

  1. BIOP

    Opening of the database to authorized professionals.

  2. Directives

    Due diligence obligations clarified.

  3. Digital certification

    Integration of digital certificates into catalogues.

  4. Directory

    Continuous updating of approvals (indicative).

Check before you buy

Small Mosque in the Kaiserbagh, Felice A. Beato (1858)
Small Mosque in the Kaiserbagh, Felice A. Beato (1858)
Teapot, Louis Rorimer (c. 1910)
Teapot, Louis Rorimer (c. 1910)
Portrait of John VIII Palaoelogus, Emperor of Constantinople, 1424-1428 (reverse), Pisanello (c. 1438–1439)
Portrait of John VIII Palaoelogus, Emperor of Constantinople, 1424-1428 (reverse), Pisanello (c. 1438–1439)

Approved or non-approved house

Sugar Bowl, Louis Rorimer (c. 1910)

Approved house

Due diligence commitment
  • Consults the BIOP
  • Keeps provenance records
  • Cooperates with the Organization

Reduced risk.

The birth of Rama and his brothers, from Chapter 17 of the Bala Kanda (Book of Childhood) of the Adhyatma Ramayana (Rama's Journey of the Su (c. 1820–30)

Non-approved house

No commitment towards OIMAP
  • Variable practices
  • No oversight
  • No mention of approval

Increased vigilance.

Apply for approval

  1. Assemble the file

    Statutes, references, internal procedures.

  2. Submit

    On the OIMAP Desk.

  3. Review

    Five working days, complete file.

  4. Decision

    Notification and entry in the directory.

  5. Renew

    Every year before expiry.

Application file

An auctioneer

Beaker (c. late 600s–early 700s)
« Systematically consulting the database spared us two disputed sales last year: it is a professional reflex. »
Isabelle Fontaine, auctioneer (example)

Glossary

Approval
Annual recognition of a house's due diligence.
Lot
Object or set offered for sale.
Consignor
Person who entrusts an item to the house.
Diligence
Reasonable checks before the sale.

Suspension and withdrawal

An approval may be suspended in the event of serious or repeated breach: sale of a lot flagged in the BIOP, failure to cooperate, falsified documents. The house is heard before any decision, and a means of appeal is available.

The withdrawal is published in the directory. It does not prevent the house from continuing its business, but it loses the mention of approval.

Frequently asked questions

Is approval mandatory?

No, but it is required by certain institutional buyers.

How much does it cost?

€450 as a guide; see the Desk's fee schedule.

What should I do if I have doubts about a lot?

Suspend the sale and alert the Organization.

Where can I report a breach?

Through the contact form.

Useful documents

Contacts

India. Benares. Aurangzeb's Mosque, after a photo by Dr. Kurt Boeck, Photoglob Co. (c. 1890–1910)
India. Benares. Aurangzeb's Mosque, after a photo by Dr. Kurt Boeck, Photoglob Co. (c. 1890–1910)
General SecretariatParis — Headquarters+33 1 00 00 00 00secretariat@oimap.exampleMonday to Friday, 9 am – 5 pm

See the Desk

The Grotto of Posillipo, Hubert Robert (c. 1769)

Submit an approval application.

OIMAP Desk
Image credits (17)
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