An ordinary policy covers a location. It names an address, sometimes a room, and it stops taking effect as soon as the property leaves. For a machine or a stock the rule has no consequence, since they do not leave. For a work of art it opens a gap in cover exactly where the risk is greatest, because a loaned work spends most of its exposure not hanging on a wall but packed, carried, loaded, unloaded and stored. Nail to nail cover exists for that reason: it follows the object from the instant it leaves its usual place until the instant it returns, packing, crating, transport, intermediate storage including customs zones, and the journey back.
The first thing gained is therefore that this cover follows the risk rather than an address, and that it does so because the statistics require it: most losses occur during handling and not during exhibition. A work on a museum wall, alarmed and in controlled climate, is in the safest situation of its entire journey. Danger concentrates in brief, repeated gestures, performed by different teams, often under schedule pressure, and almost always at a moment when one party's responsibility ends while another's begins.
That is where the real subject of the module lies, and the right word is the seam. In a loan, each institution insures its segment. The lender covers its work while it is away from its walls; the borrower covers what is in its care. Those two formulations look complementary and are not: on an unloading dock, while a carrier engaged by one party unloads a crate the other's registrar is about to receive, both descriptions are simultaneously arguable. Two policies can each therefore believe the other is on risk, and that belief only surfaces when the crate is opened.
The difficulty hardens once one notices that law and contract do not fix custody at the same instant. In law, custody transfers on delivery and its acceptance. In policies, the trigger may be the signing of the condition report, the crate crossing the threshold, or the end of the carrier's responsibility under the transport contract, which is something else again. Those three instants are distinct, separated by minutes or by days where a crate sits acclimatizing before opening, and a loss falling between them ends up defended by nobody. The question is therefore not who is responsible, it is which event the contract chose for the switch.
Difference in conditions policies are the tool the market built to fill these seams, and one has to know what they actually fill. A lender who judges the borrower's cover narrower than its own buys a cover that responds where the other is more restrictive: it fills a gap in CONDITIONS. It does not necessarily fill a hole in TIME, that is, an interval where neither policy triggers. The distinction is fine on the page and brutal on a dock, because it is precisely the temporal hole that opens at handover, rather than a divergence in perils covered.
A touring exhibition multiplies all of this by the number of stops. Three venues means six handovers, each with its own arrangement. Some institutions do not insure in the commercial sense at all but benefit from a public indemnity scheme, with its own triggering conditions and its own exclusions, which do not articulate like a policy. The lender then faces a chain whose links are not of the same nature: a policy, a state indemnity, another policy, and between them seams none of which is described in the same vocabulary.
That leaves the instrument that resolves most of this, and it is not contractual. The condition report, signed, timed and photographed at every handover, fixes simultaneously the state of the work and the instant of transfer. It turns an argument about custody into a documented fact. It does more: it allows damage to be attributed to a segment. Without it, a crate opened at the third venue reveals damage that could have occurred at any of the five preceding stages, and attribution becomes impossible to establish, which moves the debate from responsibility to burden of proof. The step that costs twenty minutes on a dock decides files worth several hundred thousand euros.
A collector lends a work, insured nail to nail for an agreed value of 900,000 euros, to a touring exhibition at three venues. Transport from venue A to venue B is entrusted to a carrier engaged and paid by A. The crate arrives at B on April 3 at 4 pm; B's registrar signs a receipt noting the crate is externally intact, without opening it, the practice being to let the work acclimatize. On April 7, on opening, a 22 centimeter tear is found. Restoration and depreciation are assessed at 220,000 euros. A's insurer maintains its cover ended on delivery on April 3; B's insurer maintains the damage predates effective taking in charge, on April 7 at opening.
The reflex is to say that damage discovered at B belongs to B, and that is the mistake: discovery is not occurrence. The April 3 receipt proves nothing about the work, it only proves the crate was externally intact, which excludes neither an impact absorbed by the packing nor a humidity swing during the journey. Both insurers therefore have an arguable position, and that is exactly the situation the seam produces: four days during which custody has legally transferred but the state of the work is unknown to everyone. The collector, for his part, does not have to arbitrate that debate, and that is what the file teaches. His nail to nail policy covers the entire journey without distinguishing segments, precisely so that he never has to prove where the damage occurred. He therefore claims the 220,000 euros on his own policy, and the split between A's and B's insurers becomes a subrogation dispute that no longer concerns him. The value of nail to nail is therefore not the breadth of perils covered, which the other policies cover just as well: it is that it dispenses with locating the loss in time. Finally, the failing that created the whole affair cost twenty minutes: opening the crate on receipt, or failing that expressly recording that the report covers the packing only, which would at least have named the uncertainty instead of letting it pass as a conforming delivery.
- 01A location policy stops at the door, and it is outside that most art losses occur: nail to nail follows the risk, not an address.
- 02The seam is the instant custody changes hands, and law, the transport contract and the policy do not place it at the same moment.
- 03A difference in conditions policy fills a gap in conditions, not necessarily a hole in time, and it is the temporal hole that opens on a dock.
- 04Discovery is not occurrence: a crate received without being opened proves nothing about the state of the work.
- 05The signed, timestamped condition report at each handover is what allows damage to be attributed to a segment, and therefore what decides the file.