A creditor holds an enforceable title (titre exécutoire) against a person who owns, together with his or her brothers and sisters, a house received by inheritance. The debtor therefore does not hold a building, but an undivided share in that building. Can that share be seized directly? No. Can it be left to slip away without security? Certainly not. Between these two extremes lies the creditor's whole strategy: register a judicial mortgage over the share, then set partition in motion so as to turn that security into a useful seizure. This guide sets out how a judicial mortgage works over jointly owned property, the uncertainty of partition that weighs on this security, and the interplay between registration, partition brought about by the creditor and seizure of real property.
Joint ownership and the position of the personal creditor of a joint owner
Joint ownership (indivision) is the situation in which several persons hold rights of the same nature over the same property, without any physical division of the shares. Each joint owner (indivisaire) holds an abstract share (a third, a quarter, a half), and not a physically identified portion of the building. This situation most often arises from an estate, a divorce in the course of liquidation, or the acquisition of property by several people without a company.
The legal starting point is set by Article 815 of the French Civil Code, under which no one may be compelled to remain in joint ownership and partition may always be sought, unless it has been suspended by judgment or agreement. Joint ownership is by nature a provisional state, destined to be brought to an end. This organised precariousness is precisely what the creditor will rely on.
A fundamental limit laid down by Article 815-17 of the French Civil Code must still be understood. The personal creditor of a joint owner, that is, one whose claim arose against only one of the joint owners and not against the joint ownership itself, cannot seize the debtor's share in the jointly owned property:
The personal creditors of a joint owner may not seize his share in the jointly owned property, movable or immovable. They may, however, bring about partition in the name of their debtor or intervene in a partition brought about by him. (Article 815-17, paragraph 3, of the French Civil Code)
This rule protects the other joint owners: they do not have to bear in their own assets the consequences of the personal debts of one of them. It explains why a creditor cannot start a direct seizure of real property over an undivided share. But it leaves the creditor two levers: to bring about partition, and to intervene in a partition begun by the debtor. The whole security strategy is organised around these two levers.
The judicial mortgage: what exactly are we talking about
Two mechanisms go by the name of judicial mortgage, and confusing them leads to procedural errors.
The protective judicial mortgage, or judicial security
Governed by Articles L. 531-1 et seq. and R. 531-1 et seq. of the French Code of Civil Enforcement Procedures (CPCE), the protective judicial mortgage is a protective measure taken before any judgment ordering payment, or even before any proceedings on the merits. A creditor that does not yet have an enforceable title applies to the enforcement judge (juge de l'exécution) for leave to register security over a building belonging to the debtor, in order to freeze the position.
Leave requires the two conditions of Article L. 511-1 of the CPCE to be met: showing a claim that appears well founded in principle, and circumstances likely to threaten recovery. A debtor who is engineering insolvency, who is multiplying disposals of assets or who disputes without serious grounds an invoice that has long been overdue typically meets these conditions. Once the order has been obtained, a provisional registration is made at the land registry (service de la publicité foncière, SPF), then confirmed by a definitive registration once judgment on the merits has been obtained. The conditions for leave and the passage from provisional to definitive registration are set out in our article on the provisional judicial mortgage.
The judicial mortgage arising from a court decision
The second mechanism assumes that the creditor already holds a court decision declaring it to be the holder of a claim. This mortgage, which since the reform of the law of security interests (Ordinance No. 2021-1192 of 15 September 2021, in force since 1 January 2022) has been classed among statutory mortgages, allows security to be registered over the debtor's buildings on the basis of the judgment ordering payment. No prior leave from the enforcement judge is needed here: the judicial title is sufficient.
In both cases the purpose is the same: to give the creditor a right of preference (to be paid ahead of unsecured creditors out of the sale price) and a right to follow the property (to pursue it into whatever hands it passes). The question that concerns us is how these prerogatives behave when the base of the mortgage is not a whole building, but an undivided share.
Registering a judicial mortgage over the share of a joint owner
Registering a mortgage and joint ownership are not incompatible. A joint owner may validly mortgage his or her share, and a creditor may have a judicial mortgage registered over that same share. The prohibition in Article 815-17 concerns seizure of the share, not the taking of security over it. The distinction is crucial: the creditor cannot sell the share, but can encumber it.
In practical terms, registration of a judicial mortgage over jointly owned property follows the usual land registration route. The registration form filed at the land registry must precisely identify the building concerned (cadastral reference, address) and the fraction of the debtor's rights that forms the base of the security. The mortgage does not attach to the whole house, but to the undivided rights of the debtor alone: for example, the undivided third of a joint owner who shares the property with two co-heirs.
This registration has immediate effects. It makes the security enforceable against third parties, it ranks from its date, and it warns any potential buyer or any other creditor that security exists over the share. A creditor that registers early ranks ahead of one that registers late: over undivided shares, where competition between the personal creditors of several joint owners is common, priority of rank can decide who is paid and who remains unpaid.
Take the illustration of a craftsman who is a creditor of an individual for unpaid works. That individual holds an undivided quarter of an apartment received from his or her parents. The craftsman, armed with an order for payment (ordonnance d'injonction de payer) that has become enforceable, has a judicial mortgage registered over the undivided quarter. He cannot yet force a sale. But he has locked in his position: if the share is transferred, he will exercise his right to follow the property; if the property is partitioned, his security will follow the fate of the share. That fate remains to be understood, because this is where the whole subtlety lies.
The uncertainty of partition: the declaratory effect that governs the fate of the security
A mortgage registered over an undivided share is not a consolidated security. Its definitive effectiveness depends on the outcome of partition, because of a cardinal principle of the law of joint ownership: the declaratory effect of partition.
Article 883 of the French Civil Code provides that each co-heir is deemed to have succeeded alone and immediately to all the property included in his or her lot, and never to have owned the other property of the estate. In other words, partition does not transfer rights from one joint owner to another: it reveals, retroactively, that each was the owner from the outset of the property allocated to him or her. The joint ownership is deemed never to have existed.
This retroactive mechanism has direct consequences for the security:
- If the mortgaged property is allocated to the debtor on partition, the debtor is deemed to have been its sole owner from the outset. The mortgage, which attached to a share, is then consolidated over the whole building so allocated. The creditor's security is strengthened.
- If the mortgaged property is allocated to another joint owner, the debtor is deemed never to have owned it. The mortgage, retroactively deprived of its object, falls away. The creditor loses its security over that property, and must turn to whatever its debtor has received in his or her own lot (for example a balancing payment (soulte) or another property).
The French Civil Code, in its wording resulting from the reform of security interests, expressly regulates this outcome by providing that a mortgage encumbering an undivided share retains its effect only to the extent that the joint owner who granted the security, or whose share was encumbered, is allocated the property on partition. The security is thus subject to an uncertainty: the creditor will know only at the end of partition whether its security stands or falls.
This dependence changes the nature of the registration. Registering a mortgage over an undivided share means taking a conditional security. It is useful because it ranks, because it discourages transfers and because it puts the creditor in a position of strength. But it is not yet a fully enforceable security. To make it enforceable, the joint ownership must be brought to an end. Hence the decisive lever.
Partition brought about by the creditor: the lever that unlocks the security
Article 815-17, paragraph 3, of the French Civil Code gives the creditor a power that is the pivot of the whole strategy: to bring about partition in the name of its debtor. Since the creditor cannot seize the share, it will compel an end to the joint ownership in order to turn this abstract share into property that can be seized.
Bringing about partition or intervening
Two routes are open to the creditor. It may itself bring about partition, by exercising the derivative action (action oblique) recognised by Article 815-17: it acts in the name of the defaulting debtor who, for his or her part, refrains from seeking partition. It may also intervene in a partition already begun by the debtor or by another joint owner, in order to monitor the operations and protect its interests. This intervention is not incidental: it prevents the debtor and the other joint owners from arranging a collusive partition intended to remove the mortgaged property from the creditor's reach. The two categories of creditor and the procedure for this action are covered separately in our article on the creditor of a joint owner and partition brought about by the creditor.
Partition may be amicable, where all the joint owners agree on the allocation, or judicial, where it is necessary to go before the court because of a disagreement or the presence of a person lacking capacity. A creditor that brings about partition must first call on the joint owners to partition, and observe the applicable formalities, in particular the power of the other joint owners to halt the partition action by discharging the obligation in the name and on behalf of the debtor.
The interplay with the registered mortgage
This is where the earlier registration takes on its full meaning. A creditor that registered its mortgage before bringing about partition has an interest in the encumbered property being allocated to its debtor, because its security will then be consolidated over the whole building. It will therefore press, in the partition operations, for the mortgaged property to be allocated to its debtor or, failing that, for the value of the share to be converted into a sum that can be seized (a balancing payment, a share of the price in the event of sale by auction (licitation)).
Where the property cannot conveniently be divided in kind, it is sold at auction: this is licitation. The debtor then receives his or her fraction of the price, and the creditor can claim that sum. Licitation is often the practical outcome for a single building held by several joint owners who cannot agree.
From mortgage to seizure of real property
Once partition has taken place and the property has been allocated to the debtor, the obstacle in Article 815-17 disappears. The debtor is no longer the holder of an unseizable share, but the owner of a building or of a share of price that can be claimed. The combination of seizure of real property and mortgage then becomes operational.
The creditor may begin seizure of real property under the rules of Articles L. 311-1 et seq. and R. 311-1 et seq. of the French Code of Civil Enforcement Procedures. Armed with its enforceable title, it has a payment order operating as seizure (commandement de payer valant saisie) served and registered at the land registry, and the matter is then brought before the enforcement judge for the orientation hearing. The sale then takes place by private agreement with the judge's leave, or by auction.
The mortgage registered at the outset then plays its full role. It gives the creditor a rank of preference in the distribution of the price: it will be paid ahead of unsecured creditors and ahead of mortgagees registered later. The right to follow the property also allows it to pursue the property even if it has meanwhile been transferred to a third party, who cannot ignore the registration that has been made public. The course of this distribution and the rights exercised in it by the holder of security are set out in our article on the registered creditor in a seizure of real property.
The complete sequence therefore reads as follows: registration of the judicial mortgage over the share to obtain rank and secure the position, bringing about partition or intervening in it to bring the joint ownership to an end, then seizure of real property over the property or claiming the share of the price, with exercise of the right of preference conferred by the security. Each link prepares the next, and omitting one undermines the effectiveness of the whole.
Points of vigilance and strategic choices
Several practical difficulties deserve the attention of the creditor and its adviser.
The first risk lies in the uncertainty of partition already described. Registering a mortgage without anticipating the allocation of the property may result in a security that falls away if the encumbered property falls into the lot of another joint owner. From the time of registration, the creditor must therefore think about the exit: either it targets a property that it can have allocated to its debtor, or it accepts that its security will transfer to the value received by the debtor, which requires close monitoring of the partition operations.
The second point concerns competition between creditors. In joint ownership arising from an estate, several joint owners may each have their own personal creditors. Rank of registration decides between these creditors over the same share. Registering quickly, and before the opening of an amicable partition liable to fix the allocations, is a decisive advantage.
The third point is the power of the other joint owners to halt the partition action by paying off the creditor. This power, provided for by the French Civil Code, may result in rapid payment, which is not unfavourable to the creditor, but it may also be used to neutralise a partition regarded as premature. The creditor must factor this possibility into its assessment of the timetable and cost of the procedure.
Finally, the protective judicial mortgage route deserves to be preferred where the debtor shows signs of engineering insolvency. Taking the provisional registration before judgment on the merits, rather than waiting for the definitive title, makes it possible to fix rank at an early date and to prevent a transfer of the share from taking place in the meantime.
Conclusion
A judicial mortgage over an undivided share is not a self-sufficient security: it is the first stage of a strategy in three movements. Registration fixes rank and locks in the position, but it remains subject to the uncertainty of partition because of the declaratory effect of Article 883 of the French Civil Code. The real lever is the partition brought about under Article 815-17, which turns an unseizable share into property or a sum that can be claimed. Seizure of real property comes only at the end of this sequence, once the joint ownership has been brought to an end.
The message for any creditor is clear: it is not enough to register, the exit from joint ownership must be steered and the allocation of the encumbered property anticipated. Before any registration over an undivided share, have your adviser analyse the composition of the joint ownership, the value of the lots likely to be allocated to the debtor, and the realistic timetable for partition: it is this anticipation, and not the mere taking of security, that will decide whether you are paid.
Frequently asked questions
Can a creditor seize a joint owner's share in a building directly? No. Article 815-17, paragraph 3, of the French Civil Code prohibits the personal creditor of a joint owner from seizing his or her share in the jointly owned property, movable or immovable. The creditor must first bring about partition, or intervene in a partition already begun, so that the share becomes property allocated to the debtor, since only that property can then be the subject of a seizure of real property.
Can a judicial mortgage be registered over an undivided share? Yes. The prohibition in Article 815-17 concerns seizure, not the taking of security. A creditor may have a judicial mortgage registered over its debtor's undivided rights at the land registry. The registration ranks from its date and makes the security enforceable against third parties, but its definitive effectiveness depends on the outcome of partition.
What happens to the mortgage if the encumbered property is allocated to another joint owner? It falls away. Because of the declaratory effect of partition set out in Article 883 of the French Civil Code, the debtor is deemed never to have owned the property allocated to another joint owner. The mortgage, retroactively deprived of its object, falls. The creditor must then turn to what its debtor has actually received in his or her lot, for example a balancing payment or a share of the proceeds of a sale by auction.
What is the difference between a protective judicial mortgage and a mortgage arising from a judgment? The protective judicial mortgage, governed by Articles L. 531-1 et seq. of the French Code of Civil Enforcement Procedures, is taken before any definitive title, with leave of the enforcement judge, on the conditions of Article L. 511-1 (a claim well founded in principle and a threat to recovery). A mortgage arising from a court decision is taken on the basis of a judgment ordering payment, without prior leave. Both confer a right of preference and a right to follow the property.
How does a creditor bring about partition of the joint ownership? It exercises the power conferred by Article 815-17, paragraph 3, of the French Civil Code, acting in the name of its defaulting debtor. After calling on the joint owners to partition, it begins an amicable partition if agreement is possible, or a judicial partition before the court in the event of disagreement. The other joint owners may halt the action by discharging the debt in the name of the debtor.
Is a registered mortgage needed to bring about partition? No, the power to bring about partition belongs to any personal creditor of a joint owner, whether or not it holds a mortgage. But registering a mortgage before bringing about partition clearly strengthens the creditor's position: the security ranks, discourages transfers, and is consolidated over the whole building if the encumbered property is allocated to the debtor at the end of partition.
How long does it take to turn an undivided share into payment? There is no standard period, because the duration depends on whether the partition is amicable or judicial, the number of joint owners, whether a sale by auction is needed and any disputes. A judicial partition followed by seizure of real property can extend over several months or more. Early registration of a protective mortgage makes it possible to secure rank throughout that period.
Quatre questions suffisent à situer votre position, le délai qui vous reste et ce qu'il faut vérifier en priorité. Vous décidez ensuite si vous en parlez au cabinet.
Décrire ma situationAn invoice that remains unpaid?
Depending on whether or not you hold an enforceable title, and on the age of the debt, the quickest route is not the same.








