Art. 1591
The price of a sale must be determined and designated by the parties, or at least determinable.
Art. 1169
A contract for value is void where the counterpart agreed is illusory or derisory — the basis for vil prix.
No lesion
Mere undervalue does not rescind an ordinary sale of goods between businesses in France.

The requirement of a real and serious price

Under Article 1591 of the Civil Code, the price of a sale must be determined and designated by the parties, or at least determinable from objective factors without a fresh agreement. That is the rule most foreign businesses know. Less obvious is a second, unwritten requirement developed by the courts: the price must also be real and serious (un prix reel et serieux). A figure typed into a contract is not enough if the parties never intend it to be paid, or if it bears no rational relationship to the value of the thing sold.

This is where the concept of vil prix in France comes in. A sale is defined by Article 1582 of the Civil Code as the transfer of ownership of a thing in exchange for a price. The price is therefore a constituent element of the contract, not an accessory term. If the price is missing, fictitious or derisory, one of the elements without which a sale cannot exist is absent, and there is no valid sale at all. The court does not rewrite the bargain; it finds that no sale was ever formed. You can read more about how the two building blocks fit together in our guide to the thing sold and the price.

It is important not to overstate the rule. The parties remain free to fix the price as they see fit, and a hard-bargained low price is perfectly valid. A seller who accepts a keen figure to clear stock, to win a strategic customer or to exit a loss-making line has agreed a real price, and French law will hold both sides to it. The doctrine of vil prix bites only at the extreme edge — where the price has no economic substance and functions as a mere label rather than a true counter-performance.

Vil prix: why a derisory price voids the sale

A vil prix is a price that is fictitious or derisory — one so trivial that it cannot be regarded as a real counterpart for the transfer of ownership. The modern statutory anchor is Article 1169 of the Civil Code, under which a contract for value is void when, at the moment it is formed, the counterpart agreed in favour of the party who binds itself is illusory or derisory. Applied to a sale, if the price the buyer promises is illusory or derisory, the seller receives no genuine counter-performance and the sale falls.

This connects with Article 1163 of the Civil Code, which requires the object of every obligation to be present or future, possible, and determined or determinable. The Cour de cassation has long held that a sale stipulating no serious price is void for want of price — a line of authority that predates the 2016 reform and survives it. The nullity does not depend on bad faith or fraud; a derisory price is fatal on its own because the sale is structurally incomplete.

The one-euro trap

A symbolic one-euro price is not automatically valid or automatically void. Courts uphold it where there is real additional consideration — typically the buyer assuming heavy liabilities of a distressed business — so the euro is shorthand for a substantial transfer of burdens.

Where a one-euro or symbolic price masks a pure transfer with nothing else changing hands, it risks being struck down as vil prix or requalified as a disguised gift.

The practical test is whether the price, taken together with any other obligations the buyer assumes, represents a true economic counterpart. A nominal figure attached to a transfer of assets that carries genuine debts, warranties or ongoing commitments can be serious. A nominal figure attached to a clean, valuable asset that the buyer takes for nothing is the paradigm of vil prix in France.

Vil prix is not lesion: undervalue does not cancel a sale of goods

Foreign buyers and sellers often assume that a price well below market value can be undone as an unfair bargain. In France that is generally wrong. The starting principle is that a lack of equivalence between the performances is not a ground of nullity unless the law expressly provides otherwise. A bad deal — even a very bad deal — does not annul the contract. The seller who sold too cheaply, or the buyer who paid too much, is bound by the price agreed.

Rescission for undervalue, known as lesion, is an exceptional remedy. French law allows it only in defined situations — most notably the sale of immovable property where the seller is prejudiced beyond a statutory fraction of the value, certain partitions, and acts by protected persons. It does not apply to ordinary sales of goods, materials or movable assets between businesses. Tellingly, in a contract of exchange (echange), the Civil Code expressly excludes rescission for lesion, underlining how narrow the remedy is.

Key distinction

Vil prix asks: is there a real price at all? If not, the sale is void because an essential element is missing.

Lesion asks: is the agreed price fair? For a sale of goods, French law does not entertain that question — the parties are held to their bargain.

The consequence for a cross-border business is clear. You cannot walk away from a commercial sale of goods merely because you now think the price was too low. Your routes, if any, are to show that there was no real price at all (vil prix), or to attack your consent to the sale for error, fraud or duress — not to plead lesion. This is one reason a well-drafted valuation record matters before you sign.

Simulated prices and sales that disguise a gift

A distinct problem arises where the apparent price differs from the secret reality. If the parties present a sale to the outside world but privately agree that the buyer will never actually pay, the visible sale is a simulation and the hidden act is a gift. French law looks through the label to the real intention of the parties, and applies the rules governing gifts — including their vulnerability in insolvency, their reduction in favour of forced heirs, and the requirement of a notarial deed.

The courts identify a disguised or indirect gift from a combination of signals: a fictitious or trivial price, a false statement about the origin of the funds said to have paid it, systematic under-valuation of transactions, and above all an intention to give (intention liberale). Where those elements are present, the Cour de cassation has requalified a sale at a low price as an indirect gift. A sale by a commercial company to its own director at a price below market value has been treated the same way.

Cross-border note

Requalification does not depend on the parties calling the deal a gift. A cross-border group that moves an asset to a French subsidiary at book value can find the transfer recharacterised on the basis of an intention to give inferred from the undervalue.

The label on the contract is not decisive — the economic reality and the parties' intention are.

Under-declaring only part of the price — a genuine sale where the parties hide a portion of the consideration to reduce tax — is a different phenomenon again, carrying its own tax and criminal exposure rather than civil nullity of the sale. The common thread is that French law consistently favours substance over form when it comes to the price.

The kind of nullity and who can invoke it

When a price is derisory or fictitious, the sanction is nullity — the sale is treated as never having existed. French law distinguishes absolute nullity, which protects the general interest and can be raised by any interested party, from relative nullity, which protects a private interest and can be invoked only by the person the rule is designed to protect. The classification of a sale void for want of a serious price has shifted over time, and the Cour de cassation has approached it in more than one way; the modern reform tends to align a missing price with the protection of the party who bound itself.

The distinction is not academic. It determines who may sue, whether the defect can be cured by confirmation, and how the limitation period runs. In practice, an action to have a sale annulled for absence of a serious price, or to requalify it as a disguised gift, is subject to the ordinary five-year limitation, which generally runs from the day the claimant knew or should have known the facts. Directors, shareholders, creditors or heirs affected by an undervalued transfer are frequently the ones who raise it years later.

The effect of nullity is retroactive. Both sides must be put back in the position they were in before the contract, which means mutual restitution: the thing returns to the seller and any price paid returns to the buyer. A French court may order these restitutions of its own motion once it annuls the sale, and the accounting can extend to the value of the use the buyer enjoyed in the meantime. For a business, an annulment years after the event can be far more disruptive than the original bargain.

Practical risk areas: intra-group transfers, gifts and tax

The highest-risk transactions are intra-group transfers priced at book value or a token amount. Moving inventory, equipment or a business line between related companies at a price disconnected from market value invites two attacks at once: civil requalification as an indirect gift, and challenge by other stakeholders. The Cour de cassation has requalified a below-market sale by a company to its director as an indirect gift precisely because the undervalue, coupled with the relationship, pointed to an intention to give.

The tax dimension is often the more immediate threat. The French tax authorities can reassess a transfer where the price is markedly below fair market value, treating the shortfall as a taxable gift or reintegrating it into the seller's results, with penalties. This exposure is independent of civil nullity: a sale can be perfectly valid between the parties yet still be reassessed for tax on the basis of the gap between price and value. Any group planning a low-price transfer of French-situated assets should take tax advice before signing, not after.

Abusively low purchase price

Separately, Article L442-7 of the Commercial Code sanctions a business that imposes an abusively low price on a supplier in a commercial relationship. A French commercial court has condemned a buyer for purchasing goods at a price deemed abusively low.

This is a competition and fair-dealing liability owed to the counterparty — not a nullity of the sale — but it shows that in France a price can be attacked from the low side as well as the high.

For a purchaser, the mirror risk is buying a distressed business or asset for a nominal sum. Here a low price is legitimate, but the file must show why: the liabilities assumed, the commitments taken on, and the commercial logic that makes one euro a serious price. The difference between a defensible symbolic price and a void vil prix is almost always in the evidence.

How to evidence a serious price

Because vil prix in France turns on whether the price is real and serious, the practical answer is almost entirely evidential. A price that can be justified by a documented valuation and shown to have actually moved is very hard to attack. The steps below help a buyer or seller build a file that supports the price they have agreed, whether it is a market figure, a deep discount or a symbolic amount tied to assumed liabilities.

Step 1
Value the asset independently
Obtain a dated valuation or expert opinion of the thing sold before signing, so there is an objective benchmark against which the price can be measured.
Step 2
Record the commercial rationale
Where the price sits below market, document why — stock clearance, distressed sale, strategic customer, assumed debts — in the recitals or a board minute.
Step 3
Make the price move
Ensure the price is actually invoiced and paid by traceable means. A price that is never paid is the classic signal of a fictitious price disguising a gift.
Step 4
Capture non-cash consideration
If the buyer assumes liabilities, warranties or ongoing obligations, spell them out. They form part of the serious counterpart even when the cash figure is small.
Step 5
Avoid unexplained symbolic prices
Do not attach a one-euro or token price to a clean, valuable asset with nothing else changing hands. Either agree a real price or use the proper form for a gift.
Step 6
Take tax advice on group deals
For intra-group or related-party transfers of French assets, confirm the tax treatment in advance to head off a reassessment on the price gap.

None of these steps changes the price the parties want to agree. They simply make it defensible — turning what might look like an undervalue into a documented, serious bargain that a court and a tax inspector can understand.

Guidance for low-price and symbolic-price transactions

Symbolic prices have a legitimate place. The transfer of a loss-making activity, an insolvent company or an asset burdened with obligations is often priced at one euro precisely because the real consideration is the transfer of the burden, not a cash payment. To keep such a deal safe, structure it so the assumed liabilities and commitments are explicit and quantifiable. The euro then stands in for a substantial counter-performance, and the transaction reads as a serious sale rather than a vil prix.

If what you actually intend is a gift — a transfer with an intention to give and no real counterpart — do not disguise it as a sale. French law channels gifts through a notarial deed and a specific regime, and a sale used to dress up a gift will be requalified, with the gift rules and their tax consequences applied retroactively. Choosing the right instrument at the outset avoids the far worse outcome of a requalification years later. Our overview of when a sales contract is void or voidable sets out the wider grounds of nullity.

Cross-border, the risk does not disappear because a foreign law governs the contract. Where the asset is situated in France, or a French company or taxpayer is involved, French requalification and tax rules can still bite regardless of the chosen governing law. A structure that is unremarkable under English or German practice may attract attention in France if the price looks disconnected from value. Before pricing any French-facing transfer at a low or symbolic figure, it is worth a short review of the civil and tax exposure so the deal holds up on both fronts.

Vil prix, lesion and abusively low price compared

The three ways a French court can look at a low price are easy to confuse. They rest on different tests and lead to different outcomes, so it helps to see them side by side before deciding how to protect or challenge a transaction.

ConceptWhat it isEffect on a sale of goods
Vil prix / derisory priceNo real or serious price — an essential element of the sale is missing (Articles 1591 and 1169)The sale is void; mutual restitution follows
Lesion (undervalue)A mere imbalance between the price and the value of the thingNot a ground of nullity for ordinary goods; the parties are bound
Disguised giftA sale masking an intention to give, shown by a trivial price and other signsRequalified as a donation, with the gift and tax rules applied
Abusively low priceAn abusively low price imposed on a supplier in a commercial relationship (Article L442-7 of the Commercial Code)Competition-law liability to the counterparty, not nullity of the sale

In short, only vil prix attacks the existence of the sale. Lesion is unavailable for goods, a disguised gift is recharacterised rather than annulled as a sale, and an abusively low price is a fair-dealing wrong owed to the counterparty. Getting the right category is the first step in any dispute about price.

Frequently asked questions about vil prix and undervalue in France

Can a sale be void because the price is too low?

A merely low price does not void a sale — the parties are free to fix the price. The sale is void only if the price is derisory or fictitious, so that there is no real counterpart at all. That is vil prix, sanctioned under Articles 1591 and 1169 of the Civil Code.

What is a vil prix?

A vil prix is a price so trivial or so plainly unreal that it cannot count as a genuine price for the transfer of ownership. Because the price is an essential element of a sale, a vil prix means one of the constituent elements is missing, and the sale is void rather than merely unfair.

Is undervalue a ground to cancel a sale of goods in France?

No. Rescission for undervalue, or lesion, is exceptional and does not apply to ordinary sales of goods or movable assets between businesses. A bad bargain on price alone will not annul the contract; you would need to show there was no real price, or a defect of consent such as fraud.

Does a symbolic one-euro sale work?

It can, if the euro is backed by real consideration — most often the buyer assuming the liabilities of a distressed business. Attached to a clean, valuable asset with nothing else changing hands, a one-euro price risks being void as vil prix or requalified as a disguised gift.

What is the risk of an intra-group sale at a low price?

Two risks arise together. Civilly, a below-market transfer to a related party can be requalified as an indirect gift where an intention to give is inferred from the undervalue. Separately, the tax authorities can reassess the price gap as a taxable gift, independently of whether the sale is valid between the parties.

What is the difference between vil prix and lesion?

Vil prix asks whether there is a real price at all; if not, the sale is void for a missing element. Lesion asks whether the agreed price is fair, and for a sale of goods French law does not entertain that question. One goes to the existence of the sale, the other to its fairness.

Can the French tax authorities challenge a low price even if the sale is valid?

Yes. Civil validity and tax treatment are separate. A sale can bind the parties yet still be reassessed for tax where the price is markedly below fair market value, with the shortfall treated as a gift or reintegrated, plus penalties. Taking tax advice before a low-price transfer of French assets is strongly advisable.

Key takeaways on vil prix and undervalue in France

In brief
A French sale needs a real and serious price, not just a figure in the contract (Article 1591 of the Civil Code).
A vil prix — a derisory or fictitious price — voids the sale because an essential element is missing (Article 1169).
Mere undervalue is not a ground of nullity for a sale of goods; lesion is exceptional and does not apply.
A trivial price plus an intention to give can lead a court to requalify the sale as a disguised gift.
Intra-group and related-party transfers at low prices carry both civil requalification and tax reassessment risk.
A symbolic price is defensible only when backed by real consideration such as assumed liabilities — the evidence is decisive.

How our French lawyers help with vil prix and undervalue issues

Petroff Avocats advises buyers and sellers on both sides of the price question. For those structuring a transfer, we value the pricing and consideration, document the commercial rationale, choose between a sale and a gift, and coordinate the civil and tax treatment so a low or symbolic price holds up. For those challenging a transaction, we assess whether a price is a void vil prix, a disguised gift or simply a hard bargain, and we bring or defend actions for nullity, requalification and restitution — including in cross-border and intra-group settings where French requalification and tax rules reach transfers of French-situated assets.

Pricing a French deal?

Before you sign a low-price or intra-group transfer of French assets, talk to us. We will confirm the price is defensible on both the civil and tax fronts.

Discuss your matter

This article is for general information only. It does not constitute legal advice and cannot be relied upon as such. French law on the validity of a price, the requalification of undervalued transfers and their tax treatment turns on the specific facts of each transaction. Contact our French lawyers for advice on your situation.