When a family buys a block of shares, the legal side of the transaction is almost invisible: there is a custodian, there is an entry in an account, there is certainty about who owns what. A painting works differently: it has no register of title, and there is nothing to point to in a dispute. Ownership is evidenced by a chain of documents — invoices, exhibition catalogues, expert opinions, letters from galleries — and the quality of that chain determines not only the price but the very fact that the owner actually owns.
Hence the paradox of the art market: market value and strength of title are related but not the same. A work can carry an eight-figure price and at the same time carry the risk that fifteen years from now an heir of a pre-war owner will bring a claim and a court will uphold it. The investment side of the question — liquidity, costs, returns — is covered in the piece on collectibles as an asset class. This article deals with a different layer: title, provenance, lending against a collection, and export restrictions.
That layer is worth understanding before the deal. A mistake in how shares are held is corrected by a transfer between accounts; a mistake in title to a painting is often uncorrectable, because it has to be resolved in the jurisdiction where the object physically sits, under a law the buyer never chose.
Title: nemo dat versus the good faith purchaser
The fork runs between two legal traditions. Common law starts from nemo dat quod non habet — no one gives what he does not have. A buyer of stolen goods does not become owner even if he acted in good faith and paid market price: he acquires possession only, while title stays with the original owner, who recovers the object through an action in conversion. The good faith purchaser in England and the United States is weakly protected: his remedy is a claim against his own seller, not a right to the thing itself.
Civil law protects the flow of commerce and therefore gives a good faith purchaser a chance to become owner once a period has run. In Switzerland the owner of a stolen movable can recover it within five years, while for cultural property the period is extended to thirty years from the loss, or one year from the moment the location and the possessor became known. The Swiss Cultural Property Transfer Act also imposes a duty of care whose scope depends on the market segment: an antiquities dealer investigates provenance from the outset, a buyer of modern art only once suspicion arises.
The practical conclusion: where the deal is done and where the object sits matter no less than the name of the artist — the same purchase in London and in Geneva produces a different level of protection.
Three conventions and what they actually deliver
The international layer consists of three instruments with different functions. The 1954 Hague Convention and its First Protocol address armed conflict: the Protocol requires the occupying party to prevent export of cultural property from occupied territory, to return it at the close of hostilities, and prohibits retaining it as war reparations; a good faith holder is entitled to an indemnity.
The 1970 UNESCO Convention is a state-to-state instrument: it obliges parties to prevent the import of objects stolen from museums and monuments of another party and listed in an inventory, and to return them on request with compensation to the good faith possessor. It is not retroactive, it operates only from the point at which both states have implemented it, and it gives a private owner no direct rights.
The 1995 UNIDROIT Convention is the only one of the three that operates at the level of private law. Article 3 provides that the possessor of a stolen cultural object shall return it. The period is three years from the moment the claimant knew the location of the object and the identity of the possessor, and in any event no more than fifty years from the theft; for objects from public collections and monuments the fifty-year cap does not apply, and states may declare a seventy-five-year period. Article 4 gives a good faith possessor the right to "fair and reasonable compensation", but only if he exercised due diligence — and the criteria are spelled out: the character of the parties, the price paid, and whether he consulted any reasonably accessible register of stolen cultural objects. That provision turns a database search from good practice into a legally significant act.
The restitution layer: why 1933–1945 is checked separately
Provenance covering the Nazi confiscations is treated as a separate exercise. The 1998 Washington Principles, adopted at a conference attended by 44 states, set a framework for resolving claims in good faith — but they are not legally binding. National commissions exist in only five countries: Austria, France, Germany, the Netherlands and the United Kingdom, and their recommendations are generally not binding either.
In the United States the logic is harder. The HEAR Act of 2016 introduced a single federal limitation period — six years from the claimant's actual discovery of the location of the work and of his possessory interest in it — for losses in the 1933–1945 period. The Act was originally due to expire on 1 January 2027. The revised version, signed on 13 April 2026 (Public Law 119-81), removed the sunset and expressly precluded time-based defences — laches, adverse possession and acquisitive prescription — as well as the act of state doctrine, forum non conveniens and international comity: cases are to be decided on the merits.
For an owner this means that provenance research for 1933–1945 has moved from a reputational option to the management of a concrete legal risk which, in the United States, no longer expires with time.
Authenticity: who is left to attribute
The second risk after title is forgery, and the infrastructure for confirming authenticity has weakened markedly over fifteen years. Artist foundations have closed their authentication boards en masse: the Andy Warhol Foundation after protracted litigation that cost it more than $7 million in legal fees; the Keith Haring Foundation in 2012; the Roy Lichtenstein Foundation and the Noguchi Museum in the same line. The reason is uniform: a negative opinion destroys value, the owner sues, and the defence costs more than the board is worth; works without the blessing of a now-defunct institution are hard to sell.
What is left: the catalogue raisonné, independent experts, technical analysis and contractual warranties. The auction house authenticity guarantee is the most practical instrument, but its boundaries are narrow. The standard term is five years from the date of the auction (for gemstones, wine and books, a matter of days). The guarantee is non-transferable and runs only for the benefit of the original buyer; the sole remedy is rescission of the sale and refund of the purchase price. The exclusions are material: the guarantee does not bite where the catalogue description reflected the generally accepted scholarly view at the time of sale, or where the forgery can be established only by methods that were then unavailable, impractical or damaging to the work. A shift in scholarly consensus is not the auction house's risk.
Art lending: why the painting is pledged in New York
Lending against art comes in two shapes: a pledge with delivery of the work to the lender or to agreed storage — safe for the bank but inconvenient for the owner, since the collection leaves the walls — and security without dispossession, where the work stays with the client.
The second structure is not available everywhere, and the reason is purely technical. In the United States Article 9 UCC allows a security interest to be perfected by public filing — a UCC-1 — which puts third parties on notice of the encumbrance and gives the lender priority without physical control of the object. The civil law tradition historically required dispossession for a pledge of movables; hence US leadership in this market. Some jurisdictions have solved the problem: France since 2006 and Belgium since 2013 introduced a registered non-possessory pledge, and Spain allows both models; England, Switzerland, Italy and Germany remain within possessory logic.
On the figures. Deloitte Private and ArtTactic estimate art lending at $33.9–40 billion by the end of 2025, forecast to reach $42–50.1 billion by 2027; 65% of wealth managers who work with art offer such loans. The typical LTV is around 50%, within a 40–60% band of appraised value. Pricing separates: private banks lend within the logic of a lombard facility against the overall relationship, while specialist non-bank lenders charge 10–15% and above. The risk profile is telling: in 2024, 50% of non-bank lenders recorded defaults, against 17% in 2022, while not one of the 65 private banks surveyed had a single default.
The lender's risks are the buyer's three risks in money terms: valuation is subjective and lags the market, liquidity is low, and a defect in title wipes out the collateral entirely. Credit due diligence is therefore no shallower than pre-sale diligence.
Export, storage and AML
A purchased object cannot always leave: national export regimes for cultural property operate independently of ownership.
The United Kingdom requires an individual export licence for objects more than 50 years old above value thresholds — £65,000 in the general case, £180,000 for oil and tempera paintings, a nil threshold for archaeological finds and manuscripts. The Reviewing Committee on the Export of Works of Art applies the Waverley criteria — connection with history and national life, outstanding aesthetic importance, outstanding significance for scholarship — and recommends a deferral: two to four months to find a UK buyer at the fair price, plus up to six months to raise the funds.
Italy requires authorisation to export works by authors who died more than 70 years ago; the self-certification threshold, previously €13,500, was raised to €50,000 by Law No. 40/2026. A separate mechanism is the dichiarazione di interesse culturale, the notorious notifica: once it is issued the object effectively cannot leave Italy, and the state is under no obligation to buy it. France, on refusing a certificate, designates the object a trésor national and may make a purchase offer within 30 months; no offer, and the work leaves. Russia, under Law 4804-1, requires a Ministry of Culture clearance for items on a dedicated list — artistic property pre-dating 1917, archaeological finds, instruments made before 1900; the state duty on permanent export is 5% of value capped at RUB 1 million, and temporary export is available for up to five years.
Freeports defer duties and VAT, but regulatory pressure on them is rising; the mechanics are set out in the piece on vaults and free ports. At the same time the AML perimeter is tightening: art dealers, intermediaries, auction houses and storage operators are obliged entities for transactions from €10,000, single or linked; in the UK art market participants register with HMRC. EU Regulation AMLR 2024/1624 applies from 10 July 2027 and introduces a ban on cash payments above €10,000, with counterparty identification in the €3,000–10,000 range.
Passing it to the next generation
A collection survives succession badly without preparation: it is indivisible, illiquid, and demands a valuation that heirs obtain at the worst possible moment. The general framework is in the pieces on succession planning and the inheritance tax map. What is specific to art is that the tax can sometimes be paid with the works themselves: the UK acceptance in lieu scheme settles inheritance tax by transferring pre-eminent objects into public ownership, and the French dation en paiement, under the 1968 statute, covers droits de succession, gift tax and IFI.
The rest is hygiene: all-risks insurance with a clear grasp of the exclusions (wear, inherent vice, confiscation, war, damage in transit), item-by-item valuation, and a deliberate choice of storage location, because the situs of the object determines both applicable law and tax.
Buyer's checklist
Provenance to full depth, with the 1933–1945 period checked separately.
The Art Loss Register and the Interpol database; a certificate evidences good faith, it does not guarantee clean title.
The law of the country where the object sits: nemo dat or good faith purchaser protection, and the applicable limitation periods.
Export status: can the work leave at all, and on what terms.
Contractual warranties: term, who holds them, what is excluded.
Independent valuation and insurance cover in place before delivery.