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

Ongoing restitution cases

The 126 cases under investigation: nature, progress, time limits, steps and follow-up arrangements for the parties.

Updated : October 28, 2026· 3 min read

What is being played out

Relief of Three Offering Bearers (c. 2311–2281 BCE)
Relief of Three Offering Bearers (c. 2311–2281 BCE)

One hundred and twenty-six restitution cases are currently being investigated by OIMAP's restitutions unit. They concern works of every kind and parties of every origin: museums, States, families, communities, collectors.

Each case follows a five-step course: admissibility, investigation, negotiation, decision, return. The average duration is fourteen months, but some cases are settled in three months and others take more than three years.

This page describes the state of the portfolio and how the parties follow progress.

  • Cases
  • Investigation
  • Follow-up

Ongoing restitution cases in figures

126Cases under investigation
14 monthsAverage duration
42%Cases in negotiation
18Cases in arbitration

Source: OIMAP Heritage Protection Department.

Breakdown

Admissibility12%
Investigation28%
Negotiation42%
Decision10%
Physical return8%

Cases by step.

The steps of a case

Admissibility checks that the request is complete and falls within OIMAP's competence. Investigation gathers the evidence, hears the parties and commissions experts. Negotiation seeks an agreement. The decision comes, failing agreement, through mediation or arbitration. The physical return organises the handover of the work.

Each step gives rise to a report sent to the parties. They may at any time ask for clarification or make observations.

Headdress (early 1900s)
Headdress (early 1900s)
The Dance at the Court of Herod, Israhel van Meckenem (c. 1500)
The Dance at the Court of Herod, Israhel van Meckenem (c. 1500)
Face Mask (early 1900s)
Face Mask (early 1900s)

Nature of cases

The most numerous cases concern thefts from collections or museums, sometimes old, where the work has reappeared on the market. Next come looted archaeological objects, claimed by States of origin, then historical spoliations, which require long and painstaking archive work.

A few cases concern illicit exports, where a work left a State in breach of its legislation. Their handling depends on the law of the State of origin and the applicable conventions.

Following your case

The parties have a secure space on the Desk. They check progress there, file documents, exchange with the case handler and receive summonses. A dashboard shows the next steps and expected deadlines.

Information on ongoing cases is confidential. Only aggregated statistics are published, and a few cases are presented with the parties' agreement when they are of educational interest.

Sensitive cases

Some cases, notably those concerning historical spoliations or property from colonial contexts, have a political and memorial dimension. They are handled by a dedicated team, with the support of historians and specialised lawyers.

Confidentiality is stronger there, and negotiated solutions take various forms: definitive return, long-term loan, copy or sharing. The aim is a lasting solution, accepted by all parties.

Indicative breakdown of cases

Four origins
OriginShareAverage time
Thefts from collections or museums38%12 months
Archaeological looting30%16 months
Historical spoliations18%24 months
Illicit exports14%11 months

Landmarks

  1. Filing of the request

    Acknowledgement of receipt.

  2. Admissibility

    Decision.

  3. Investigation

    Experts and documents.

  4. Negotiation

    Meetings.

  5. Closure

    Decision or return.

A long case is not a lost case

Corner Cabinet, René Dubois (c. 1765–1770)
Corner Cabinet, René Dubois (c. 1765–1770)
Palm Wine Vessel (kuh mendu) (1900s)
Palm Wine Vessel (kuh mendu) (1900s)
Red-Figure Column Krater (Mixing Vessel): Komos (Revel), Pig Painter (c. 470–460 BCE)
Red-Figure Column Krater (Mixing Vessel): Komos (Revel), Pig Painter (c. 470–460 BCE)

Simple case or complex case

Pair of Figures (late 1800s–early 1900s)

Simple

Clear ownership, cooperative holder
  • 3 to 9 months
  • Amicable agreement
  • Little appraisal

Most frequent case.

Coronation of the Virgin, Christoffel Jegher (1632–36)

Complex

Disputed ownership, long chain
  • More than 18 months
  • Multiple appraisals
  • Arbitration possible

Minority cases.

Moving a case forward

  1. Respond

    React quickly to requests.

  2. Document

    Complete the documents.

  3. Take part

    Attend the meetings.

  4. Negotiate

    Stay open to solutions.

  5. Conclude

    Sign the agreement.

What speeds up a case

A case handler

Mask (ndeemba) (early 1900s)
« The key to a case is trust. When the parties talk to each other, the rest follows. »
Aurélie Moncey, case handler in the restitutions unit

Vocabulary of cases

Admissibility
Preliminary examination of a request.
Investigation
Phase of gathering evidence.
Case handler
Person in charge of a case.
Aggregated
Grouped without identifying the cases.

Frequently asked questions

Can I find out about ongoing cases?

Only the statistics are public.

How do I follow my case?

Through the Desk.

Can I be represented?

Yes, by a lawyer.

Where do I file a request?

Useful documents

Contacts

Small Mosque in the Kaiserbagh, Felice A. Beato (1858)
Small Mosque in the Kaiserbagh, Felice A. Beato (1858)
Heritage Protection DepartmentParis — Headquarters+33 1 00 00 03 00protection@oimap.exampleMonday to Friday, 9 am – 5 pm

See the restitutions completed

Boy with Anchor, Winslow Homer (1873)

Examples of closed cases.

Restitutions completed
Image credits (16)
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