Observe · Regulate · Protect — since 2007. 19th OIMAP General Assembly: Singapore, 10–12 June 2026. Programme
Arbitration

Arbitral Tribunal (TAO)

An arbitral jurisdiction specialised in the art market and heritage: mission, organisation, principles and figures of the TAO.

Updated : October 28, 2026· 4 min read

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Private justice for a global market

Eighteen Views of Rome: The Piazza Farnese (recto), Lievin Cruyl (1664)
Eighteen Views of Rome: The Piazza Farnese (recto), Lievin Cruyl (1664)

The OIMAP Arbitral Tribunal is an arbitration institution founded in 2011 to meet a simple need: to offer players in the art world a neutral, specialised jurisdiction able to make decisions enforceable anywhere in the world.

It is independent of OIMAP's management, certification departments and decision-making bodies. Its arbitrators are appointed for their competence and commit to strict impartiality.

This page presents its mission, organisation and principles. The following pages detail its presentation, composition and statistics.

  • Tribunal
  • TAO
  • Arbitration

Arbitral Tribunal (TAO) in figures

2011Year of creation
142Arbitrators on the list
48Nationalities represented
3Languages of proceedings

Source: Registry of the OIMAP Arbitral Tribunal.

Breakdown

Europe44%
North America24%
Asia-Pacific17%
Middle East8%
Africa and Latin America7%

Geographical origin of the parties in 2024.

The tribunal's mission

The TAO settles, through arbitration, disputes relating to works of art, collectors' items and cultural heritage. It rules on the authenticity of a work, its provenance, its restitution and the contracts linked to its trade: sales, deposits, warranties, consignments.

It also offers amicable settlement through mediation. It replaces neither the criminal courts, competent for offences, nor the administrative procedures proper to States.

Coronation of the Virgin, Christoffel Jegher (1632–36)
Coronation of the Virgin, Christoffel Jegher (1632–36)
The Judgment of Solomon and Esther before Ahasuerus (pair), Dirk Vellert (c. 1530)
The Judgment of Solomon and Esther before Ahasuerus (pair), Dirk Vellert (c. 1530)
Capriccio: A Palace with a Courtyard by the Lagoon, Antonio Canaletto (c. 1750–55)
Capriccio: A Palace with a Courtyard by the Lagoon, Antonio Canaletto (c. 1750–55)

Organisation and independence

The president of the tribunal, Pr. Henri-Louis Vasseur, chairs a nine-member council that oversees the list of arbitrators and the Rules. The Registry, headed by Me Sofia Ndiaye, administers the cases. No member of the council may sit in a case.

Independence is guaranteed by several rules: written declaration of any relationship with the parties, possibility of challenge, rotation of appointments and a ban on the Organisation giving instructions to the arbitrators.

Principles of procedure

TAO procedure rests on four principles: equality of the parties, the adversarial principle, speed and confidentiality. The parties may choose the language, the applicable law, the number of arbitrators and the seat. Failing that, the Rules provide default solutions.

A procedural timetable is set at the first meeting and may be adjusted. An expedited procedure is provided for disputes below €250,000, with a sole arbitrator and an award within six months.

The TAO contributes to confidence in the market by offering a clear outcome to disagreements. It delivers its awards within controlled time limits and publishes an anonymised version when the parties authorise it.

It also works with bar associations, chambers of commerce and universities to train people in the specifics of art law, and publishes an activity report each year.

A tribunal open to all

The TAO handles disputes between major market players as well as private individuals' cases. A sliding scale and funding assistance of up to fifty percent of costs make arbitration accessible to small parties.

Parties who are unfamiliar with the procedure may seek the Registry's advice, which gives no legal consultation but explains the stages, time limits and forms.

Tribunal key figures

Tribunal activity
Indicator20232024
Requests registered188212
Awards made151169
Average duration11 months11 months
Agreements in mediation64%66%

Milestones

  1. Creation

    First rules.

  2. List of arbitrators

    Opening to 60 nationalities.

  3. Expedited procedure

    Six months.

  4. Remote hearings

    Secure videoconferencing.

  5. Online request

    Digital filing.

Confidentiality

The Calumny of Apelles, Giorgio Ghisi (1560)
The Calumny of Apelles, Giorgio Ghisi (1560)
The Dance at the Court of Herod, Israhel van Meckenem (c. 1500)
The Dance at the Court of Herod, Israhel van Meckenem (c. 1500)
Dr. James Stuart; Mary Campbell Stuart, Gilbert Stuart (c. 1815)
Dr. James Stuart; Mary Campbell Stuart, Gilbert Stuart (c. 1815)

Sole arbitrator or tribunal of three

Sketch of the Labyrinth of the Villa Pisani, Francesco Guardi (1773–1778(?))

Sole arbitrator

Faster
  • Eight months on average
  • Reduced costs
  • Suited to medium disputes

Expedited procedure possible.

The Old Market, Cleveland, Frank Wilcox (1920)

Three arbitrators

More collegial
  • Fourteen months on average
  • Collective decision
  • Suited to complex disputes

Recommended for major disputes.

Entering the procedure

  1. Read

    Consult the Rules.

  2. Check

    Check the clause.

  3. File

    Send the request.

  4. Respond

    Respondent's answer.

  5. Plead

    Hearing and award.

What the tribunal guarantees

A collector

Portrait of John VIII Palaoelogus, Emperor of Constantinople, 1424-1428 (reverse), Pisanello (c. 1438–1439)
« I feared a long public trial. In reality, everything took place discreetly and in under a year. »
Étienne Vallon, collector

Vocabulary of the tribunal

Chamber
Specialised panel of the tribunal.
Registry
Administrative department of the tribunal.
Challenge
Request to remove an arbitrator.
Seat
Legal place of the arbitration.

Frequently asked questions

Is the TAO linked to certification?

It examines appeals, but remains independent.

Who pays for the arbitration?

The parties, according to the scale.

Can one choose one's arbitrator?

Yes, from the list or outside it by agreement.

Where can I see the figures?

Useful documents

Contacts

Temple of Athene Nike. Venus Victrix—Wingless Victory, Dimitrios Constantin (c. 1850s–60s)
Temple of Athene Nike. Venus Victrix—Wingless Victory, Dimitrios Constantin (c. 1850s–60s)
Registry of the Arbitral Tribunal (TAO)Paris — Head Office+33 1 00 00 04 00greffe.tao@oimap.exampleMonday to Friday, 9 a.m. – 5 p.m.

Read the presentation

The Doge's Palace, Venice, Richard Parkes Bonington (1826)

Understand the tribunal.

Presentation
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