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

Transaction registers

Keeping a compliant register: content, format, retention, access and good practices for art market operators.

Updated : October 28, 2026· 3 min read

The operator's memory

Chemin de fer de Toulouse à Bayonne. Pont de l'Aran (en trois arches de 17m d'ouverture chacune). Situation des travaux au 21 juillet 1861, Édouard Baldus (1861)
Chemin de fer de Toulouse à Bayonne. Pont de l'Aran (en trois arches de 17m d'ouverture chacune). Situation des travaux au 21 juillet 1861, Édouard Baldus (1861)

The transaction register is a log in which the operator records, as they happen, each of its transactions: purchases, sales, deposits, agency contracts. It is the central piece of its compliance.

It must be kept chronologically, completely and tamper-proof. A timestamped digital register is recommended; a bound and initialled paper register is still allowed.

This page details the content, format and retention rules.

  • Registry
  • Retention
  • Evidence

Transaction registers in figures

10 yearsRetention period
14Mandatory fields
1,120Approved operators keeping a digital register
72 hRecommended entry time

Source: OIMAP Legal Affairs Department.

Breakdown

Digital registers78%
Paper registers14%
Mixed registers8%

Format of registers kept by operators.

What the register must contain

For each transaction, the register states: the date, the nature (purchase, sale, deposit, agency), the description of the work and its OIMAP number, the identity of the parties, the price and fees, the method of payment, the attached due diligence documents and the reference of the declaration sent to the Observatory.

It also keeps corrections: an error is never erased, it is corrected by a dated rectifying entry. This rule guarantees the integrity of the register.

Electrotype Replica of Tetradrachm: Head of Athena (obverse); Owl (reverse) (1838–1916)
Electrotype Replica of Tetradrachm: Head of Athena (obverse); Owl (reverse) (1838–1916)
Teapot, Louis Rorimer (c. 1910)
Teapot, Louis Rorimer (c. 1910)
Medal of Claude Joseph Rouget de L'Isle (1760-1836), Alfred Borrel (1911)
Medal of Claude Joseph Rouget de L'Isle (1760-1836), Alfred Borrel (1911)

Retention and access

The register is kept for ten years after the last transaction. It must be possible to produce it to the supervisory authority within fifteen days. The personal data it contains are protected: only authorised officers have access.

On transfer or cessation of business, the operator hands over its register to its successor or deposits it with the competent authority. An operator who disappears without doing so is liable to sanctions.

Register and due diligence

The register is the extension of the due diligence file: it refers to it for each transaction, so that an inspector can find, from one line of the register, all the checks carried out. This link is the key to compliance.

Operators that have adopted it note a double benefit: their inspections go faster, and their teams find information more easily to answer a client, an insurer or a court.

The mandatory fields

Content of the register
FieldContentExample
DateDay of the transaction2025-03-14
NaturePurchase, sale, deposit, agencySale
WorkDescription and OIMAP numberOIMAP-2023-001284-A
PartiesIdentity of buyer and sellerKept, not disclosed
PricePrice excluding fees and currency€18,500
PaymentMethod and dateTransfer of 18 March
Due diligenceFile referenceDIL-2025-0214
DeclarationReceipt referenceDEC-2025-1043

Landmarks

  1. Obligation

    Directive 2019-04.

  2. Standard template

    Standardised register.

  3. Digital register

    Timestamped version.

  4. 78% of registers digital

    Steady progress.

A tamper-proof register

Paper or digital register

Mercury (Budha), from a Mandi Astrology Series, Sanju (c. 1810)

Paper

Bound and initialled register
  • Simple
  • No technology
  • Difficult to search

For small volumes.

Solidus of Justinian I  (c. 545–65)

Digital

Timestamped software
  • Fast search
  • Secure archiving
  • Sharing with authorities

Recommended.

Beaker (c. late 600s–early 700s)
Beaker (c. late 600s–early 700s)
Noble: Henry VI in Ship with Shield of Arms (obverse); Ornamental Cross with Lis Terminals (reverse) (1422–61)
Noble: Henry VI in Ship with Shield of Arms (obverse); Ornamental Cross with Lis Terminals (reverse) (1422–61)
Seal Color Box (1662–1722)
Seal Color Box (1662–1722)

Setting up a register

  1. Choose

    Paper or digital.

  2. Configure

    Adopt the standard template.

  3. Train

    Inform the teams.

  4. Refer

    Record as things happen.

  5. Back up

    Archive regularly.

Points to check

An administrative director

Medal Depicting Gian Lorenzo Bernini (1598-1680) from the Illustrious Men of the Kingdom of the Two Sicilies (obverse), V. Catenacci (1830–34)
« Our digital register has become our best management tool: we find everything in ten seconds. »
Mathilde Faure, administrative director of a gallery

Vocabulary of the register

Registry
Chronological log of transactions.
Rectifying entry
Dated correction of an error.
Timestamping
Marking the date of an entry.
Initialling
Signature placed on each page.

Frequently asked questions

Is a spreadsheet enough?

If it is timestamped and protected against alteration, yes.

Who can consult the register?

Authorised authorities.

What to do in case of loss?

Declare it immediately to the authority.

Where can I find a template?

In the useful documents on this page.

Useful documents

Contacts

A Palace with an Arched Bridge (A Roman Villa), Hubert Robert (1760)
A Palace with an Arched Bridge (A Roman Villa), Hubert Robert (1760)
Legal Affairs DepartmentParis — Headquarters+33 1 00 00 02 00juridique@oimap.exampleMonday to Friday, 9 am – 5 pm

See the inspections

Scenes of Daily Life, Roads and Paths: Road to Market (Scènes de la vie quotidienne, Routes et Chemins: Route du Marché), Carle Vernet (1819)

How the authority checks registers.

Inspections
Image credits (16)
  • Portrait of Gianfrancesco Gonzaga di Ròdigo, 1443–1496, Lord of Sabbionetta (reverse), Antico (1479) — Cleveland Museum of Art, CC0 1.0
  • Chemin de fer de Toulouse à Bayonne. Pont de l'Aran (en trois arches de 17m d'ouverture chacune). Situation des travaux au 21 juillet 1861, Édouard Baldus (1861) — Cleveland Museum of Art, CC0 1.0
  • Electrotype Replica of Tetradrachm: Head of Athena (obverse); Owl (reverse) (1838–1916) — Cleveland Museum of Art, CC0 1.0
  • Teapot, Louis Rorimer (c. 1910) — Cleveland Museum of Art, CC0 1.0
  • Medal of Claude Joseph Rouget de L'Isle (1760-1836), Alfred Borrel (1911) — Cleveland Museum of Art, CC0 1.0
  • Mercury (Budha), from a Mandi Astrology Series, Sanju (c. 1810) — Cleveland Museum of Art, CC0 1.0
  • Solidus of Justinian I (c. 545–65) — Cleveland Museum of Art, CC0 1.0
  • Beaker (c. late 600s–early 700s) — Cleveland Museum of Art, CC0 1.0
  • Noble: Henry VI in Ship with Shield of Arms (obverse); Ornamental Cross with Lis Terminals (reverse) (1422–61) — Cleveland Museum of Art, CC0 1.0
  • Seal Color Box (1662–1722) — Cleveland Museum of Art, CC0 1.0
  • Medal Depicting Gian Lorenzo Bernini (1598-1680) from the Illustrious Men of the Kingdom of the Two Sicilies (obverse), V. Catenacci (1830–34) — Cleveland Museum of Art, CC0 1.0
  • A Palace with an Arched Bridge (A Roman Villa), Hubert Robert (1760) — Cleveland Museum of Art, CC0 1.0
  • Coin of Eukratides I (170–145 BCE) — Cleveland Museum of Art, CC0 1.0
  • Document Box (Ryōshibako) with Chrysanthemum and Plum (lid) (late 1800s-early 1900s) — Cleveland Museum of Art, CC0 1.0
  • Annunciation to the Shepherds: Leaf from a Book of Hours (1 of 6 Excised Leaves), Henri d'Orquevaulx (c. 1420–30) — Cleveland Museum of Art, CC0 1.0
  • Scenes of Daily Life, Roads and Paths: Road to Market (Scènes de la vie quotidienne, Routes et Chemins: Route du Marché), Carle Vernet (1819) — Cleveland Museum of Art, CC0 1.0
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