An approval for safer sales

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.
Approved auction houses in figures
Source: OIMAP General Secretariat.
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.



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The directory is updated as soon as an approval is issued, suspended or withdrawn.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
| Stage | Obligation | Evidence kept |
|---|---|---|
| Receipt of the lot | Identify the consignor | Proof of identity, mandate |
| Cataloguing | Verify provenance | Provenance file |
| Before the sale | Consult the BIOP | Record of the consultation |
| Sale | Respect restrictions | Minutes |
| After the sale | Keep the documents | Sale archives |
Milestones
- BIOP
Opening of the database to authorized professionals.
- Directives
Due diligence obligations clarified.
- Digital certification
Integration of digital certificates into catalogues.
- Directory
Continuous updating of approvals (indicative).
Check before you buy



Approved or non-approved house

Approved house
Due diligence commitment- Consults the BIOP
- Keeps provenance records
- Cooperates with the Organization
Reduced risk.

Non-approved house
No commitment towards OIMAP- Variable practices
- No oversight
- No mention of approval
Increased vigilance.
Apply for approval
- Assemble the file
Statutes, references, internal procedures.
- Submit
On the OIMAP Desk.
- Review
Five working days, complete file.
- Decision
Notification and entry in the directory.
- Renew
Every year before expiry.
Application file
An auctioneer

« Systematically consulting the database spared us two disputed sales last year: it is a professional reflex. »
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

See the Desk
Image credits (17)
- Saucer with Scene in style of Watteau (c. 1750–60) — Cleveland Museum of Art, CC0 1.0
- The Victory Banquet: from Battle Scenes of the Quelling of Rebellions in the Western Regions, with Imperial Poems (c. 1765–74; poem dated 1760) — Cleveland Museum of Art, CC0 1.0
- Vanity Case (Nécessaire) (c. 1760) — Cleveland Museum of Art, CC0 1.0
- Interior Drawer for Cabinet, André-Charles Boulle (c. 1690) — Cleveland Museum of Art, CC0 1.0
- The Four Markets: The Fruit Market, Richard Earlom (1775) — Cleveland Museum of Art, CC0 1.0
- Small Mosque in the Kaiserbagh, Felice A. Beato (1858) — Cleveland Museum of Art, CC0 1.0
- Teapot, Louis Rorimer (c. 1910) — Cleveland Museum of Art, CC0 1.0
- Portrait of John VIII Palaoelogus, Emperor of Constantinople, 1424-1428 (reverse), Pisanello (c. 1438–1439) — Cleveland Museum of Art, CC0 1.0
- Sugar Bowl, Louis Rorimer (c. 1910) — Cleveland Museum of Art, CC0 1.0
- 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) — Cleveland Museum of Art, CC0 1.0
- Beaker (c. late 600s–early 700s) — Cleveland Museum of Art, CC0 1.0
- India. Benares. Aurangzeb's Mosque, after a photo by Dr. Kurt Boeck, Photoglob Co. (c. 1890–1910) — Cleveland Museum of Art, CC0 1.0
- The Dance at the Court of Herod, Israhel van Meckenem (c. 1500) — Cleveland Museum of Art, CC0 1.0
- Carved Lacquer Scroll Box (1736–95) — Cleveland Museum of Art, CC0 1.0
- The Auction House: The Town Crier, Honoré Daumier (1864, printed 1920) — Cleveland Museum of Art, CC0 1.0
- The Calumny of Apelles, Giorgio Ghisi (1560) — Cleveland Museum of Art, CC0 1.0
- The Grotto of Posillipo, Hubert Robert (c. 1769) — Cleveland Museum of Art, CC0 1.0
Cleveland Museum of Art · CC0 1.0
OIMAP PartnersInternational organizations, approved auction houses and museums that cooperate with OIMAP.›
The OIMAP DeskThe single entry point to register, certify, track and report: procedures, timeframes and fees.›
MarketThe global art and heritage market in figures: index, segments, regions, record sales and approved operators.›
RegulationThe legal framework of the art and heritage market: international conventions, OIMAP directives, due diligence, taxation, intellectual property and consultations.›