Clear Title and Restitution: Labels and Stamps on the Back of a Painting

A clean title is the part of a purchase nobody photographs. It sits behind the estimate and the condition report, and it decides whether a work is still yours in ten years. The labels and stamps on the back of a painting are where the examination starts: an exhibition label, a customs mark, a dealer's inventory number, each a checkable claim about where the work has been and who held it. From there a house works outward into the stolen-art registers, the wartime restitution record and the export rules of every country the work has crossed. What follows is how far those checks reach, and what stays with the buyer afterwards.

Key takeaways:

• The Art Loss Register, founded in London in 1990, lists more than 700,000 items and runs more than 400,000 market checks a year.
• INTERPOL's Stolen Works of Art Database holds almost 57,000 certified police records and is named as a due diligence register by the 1995 UNIDROIT Convention.
• The Washington Conference Principles, endorsed by 44 states on 3 December 1998, gained Best Practices on 5 March 2024, endorsed by 35 countries as of 3 December 2025.
• Council Regulation (EC) No 116/2009 sets the European Union export licence threshold for a hand-executed painting over 50 years old at 150,000 EUR.

Reading the labels and stamps on the back of a painting

The verso, the reverse face of the canvas and its stretcher, is the only physical record a work keeps of its own movements. Writing for the J. Paul Getty Museum in November 2021, curatorial assistant Nicole Block called the verso "a passport for a work of art, showing where it has been during its life", listing the customs stamps, labels, wax seals and handwritten inscriptions that record where a painting has been and who owned it. Getty has published the versos of more than 320 paintings on its online collection pages. Each mark is a testable assertion: a label naming a venue, a date and a catalogue number is checked against that institution's published catalogue, and a customs stamp places the work at a named border on a given day.

Ownership is settled by the chain of transfers behind those marks, and the labels and stamps on the back of a painting record only that the transfers happened. A genuine label sits happily above a sale that was void under the law governing it, and a label costs nothing to add after the fact. Photograph and transcribe every mark before conservation disturbs it; our guide to how to read the verso of a painting sets out that sequence, and the due diligence behind every lot carries the wider framework.

Which stolen-art registers a house searches before a lot is catalogued

The International Foundation for Art Research (IFAR), a non-profit established in New York in 1969, ran the Art Theft Database whose work stimulated the establishment of the Art Loss Register in 1991, and still compiles the Stolen Art Alert with the Art Loss Register and INTERPOL. Three registers carry most of the weight in a pre-sale check.

A clear result on one register is not a clearance across all three. A loss never reported to a police force never reaches INTERPOL, and IFAR's Art Law and Cultural Property database covers export legislation, ownership case law and catalogues raisonnes that no stolen-art search reaches.

Wartime and restitution claims: what the Washington Principles ask of a seller

On 3 December 1998, 44 states endorsed the Washington Conference Principles on Nazi-Confiscated Art, eleven non-binding guidelines published by the United States Department of State. The fourth principle instructs that "consideration should be given to unavoidable gaps or ambiguities in the provenance in light of the passage of time and the circumstances of the Holocaust era", and the eighth asks that "steps should be taken expeditiously to achieve a just and fair solution". The Terezin Declaration of 30 June 2009, endorsed by 47 states, and the Best Practices of 5 March 2024, endorsed by 35 countries as of 3 December 2025, extended the frame. Point C of the Best Practices treats a sale by a persecuted person between 1933 and 1945 as capable of amounting to an involuntary transfer, which pulls documented, priced, apparently ordinary transactions into the claimable category.

For a work of that era the labels and stamps on the back of a painting are the first trace to examine. Among the versos Getty has published are a French customs stamp reading "Douanes Centrale Exportation Paris" on Paul Gauguin's Arii Matamoe and, on Francesco Guardi's Grand Canal in Venice with Palazzo Bembo, label number 3382 from the inventory of artwork confiscated by the Nazis for Hitler's museum. Article 2.3 of the ICOM Code of Ethics for Museums, revised in Seoul on 8 October 2004, requires that "every effort must be made before acquisition" to establish the full history of an item since discovery or production. Article 2.2 adds that evidence of lawful ownership in a country is not necessarily valid title.

Export licences and cultural-property rules that follow a work across borders

Title and permission to move a work are separate questions, and a buyer needs both. Council Regulation (EC) No 116/2009 requires an export licence for cultural goods leaving the customs territory of the European Union: 150,000 EUR for pictures and paintings executed entirely by hand, 50,000 EUR for original sculpture, 30,000 EUR for watercolours, gouaches and pastels, 15,000 EUR for drawings, engravings and photographs. Each category covers only work more than 50 years old that does not belong to its originator, and a member state refuses the licence where its national-treasure legislation applies.

Regulation (EU) 2019/880 governs the other direction. Since 28 June 2025 it has required an import licence for archaeological objects or parts of monuments at least 250 years old, whatever their value, and an importer statement for cultural goods older than 200 years valued above 18,000 EUR. Outside the European Union, the United Kingdom applies the Waverley criteria published by Arts Council England: whether an object is closely connected with British history and national life, of outstanding aesthetic importance, or of outstanding significance for scholarship. The Reviewing Committee, established in 1952 with eight permanent members and three independent assessors per case, recommends deferring the export licence when an object meets any one of the three, which gives British institutions a window to raise the purchase price.

The residual risk a buyer carries after every check

James Ratcliffe, the Art Loss Register's director of recoveries and general counsel, set out the limit of a register search in The Art Newspaper in 2015: "Our certificates make clear that not all thefts are reported to us, and that a search with the Art Loss Register cannot excuse the undertaking of further due diligence if such an exercise is appropriate." The same reporting established that certificates had issued for works later shown to be looted or claimed.

National law then decides who bears the loss. Article 2276 of the French Civil Code states that in the case of movable property, possession is equivalent to title, while allowing a person from whom a thing was lost or stolen three years from that day to reclaim it. Article 2277 lets a buyer at public sale keep the work unless the original owner reimburses the price paid. Point K of the 2024 Best Practices invites states to consider exceptions to statutes of limitations and good-faith acquisition in Nazi-era cases, so that protection is neither uniform nor permanent.

Seven checks compress most of what a buyer controls:

1. Photograph the verso. The labels and stamps on the back of a painting, at a resolution that lets every line be read.
2. Transcribe each mark. Venue, date, catalogue number and inventory number, recorded separately.
3. Request the searches in writing. Which databases, on what date, against which description.
4. Trace 1933 to 1945. A gap there is the most consequential silence in an ownership history.
5. Confirm the export position. Which licence issued, and by which member state.
6. Read the title clause. Warranty scope, notification deadline and the remedy offered.
7. Keep the file. Invoice, condition report, search certificates and correspondence.

Condition evidence belongs in the same file: how to read a professional condition report explains what a three-page report commits to, and the attribution ladder from autograph to follower of covers who made the work.

FAQ: labels and stamps on the back of a painting, title and restitution

Do the labels and stamps on the back of a painting prove ownership?

They evidence movement and custody, never title. A label or customs stamp places a work at a venue or a border on a date, checkable against published catalogues. Ownership turns on the validity of each transfer in the chain, which is why Article 2.2 of the ICOM Code of Ethics warns that lawful ownership in one country is not necessarily valid title.

How far back should provenance research go?

Article 2.3 of the ICOM Code of Ethics for Museums asks for the full history of the item since discovery or production. A contemporary work is traced to the studio or first gallery. Anything that existed before 1945 is examined across the years 1933 to 1945 in particular, because the Washington Principles and the 2024 Best Practices treat that window as claimable.

What happens if a restitution claim appears after the sale?

The 2024 Best Practices name restitution as the primary just and fair solution and ask current possessors not to seek repayment of the purchase price from pre-war owners or their heirs. Thirty-five countries had endorsed that text as of 3 December 2025. Recovery of the price paid then rests on the seller's warranty and on national law.

Does a work need an export licence to leave the European Union?

Under Council Regulation (EC) No 116/2009 a hand-executed painting more than 50 years old and not belonging to its originator requires a licence once its value reaches 150,000 EUR. Watercolours cross the threshold at 30,000 EUR, drawings, engravings and photographs at 15,000 EUR. A member state refuses the licence where national-treasure legislation applies.

How LLB Auction clears title before a lot goes live

Intake refusal. Roughly 40 percent of works submitted to LLB Auction are declined. Ownership history that cannot be documented is one of the reasons a work is turned away, and refusing it costs less than defending it later.

A documented file per lot. Each accepted lot carries certificate verification, ownership history and conservation records, published alongside a three-page condition report. The house records what it found and states the gaps; it does not certify authenticity or guarantee title, and the residual risk described above stays with the buyer.

Disclosed terms. Buyer's premium is 20 percent and seller's commission 10 percent, stated before bidding opens on timed online sales of 7 to 14 days.

Collectors who want the provenance file before a catalogue goes public can join the house mailing list; registering to bid sets out the identity checks that come with it.

Conclusion

Title work is cumulative. Registers covering more than 700,000 items and almost 57,000 certified police records narrow the field, the Washington Principles and the ICOM Code set the standard of effort expected of a seller, and the export regulations decide whether the work is free to travel. None of it yields a guarantee, which is why the documentation matters as much as the result. Read the labels and stamps on the back of a painting first, ask which registers were searched and when, and keep the file for as long as the work hangs on your wall.

Also worth reading:

• Provenance, attribution and condition: the due diligence behind every lot
• The back of the painting: how to read the verso
• How to read a professional condition report
• The attribution ladder: autograph, attributed to, studio of

Sources:

• About us : Art Loss Register, 2025
• Stolen Works of Art Database : INTERPOL, 2025
• Washington Conference Principles on Nazi-Confiscated Art : US Department of State, 1998
• Best Practices for the Washington Conference Principles : US Department of State, 2024
• ICOM Code of Ethics for Museums : International Council of Museums, 2017
• Regulation (EU) 2019/880 on the import of cultural goods : EUR-Lex, 2019
• Article 2276 of the French Civil Code : French Civil Code, 2023
• Stolen art? Why no one can say for sure : The Art Newspaper, 2015
• International Foundation for Art Research : Artquest, 2009
• Reviewing Committee on the Export of Works of Art : Arts Council England, 2025
• What You Can Find on the Back of a Painting : J. Paul Getty Museum, 2021