URSSAF litigation lawyer Paris

Because the time limits start to run from that document and they are short. The formal notice invites the company to regularise within one month (Article L. 244-2 of the French Social Security Code). A challenge to the formal notice is brought before the appeals board within two months of its notification (Article R. 142-1), a preliminary appeal required before going to court, save for exceptions provided by law (Article L. 142-4). If nothing is done, an enforcement order may follow, and opposition is then admissible only within fifteen days of its notification or service (Article R. 133-3).

Early action also protects the cash position. The firm checks the validity of the document, quantifies contributions and surcharges separately, then considers whether it is better to challenge, to ask the director of the agency for an instalment plan (Article R. 243-21), or to pursue both steps together. For a small company, the choice between these routes depends as much on the strength of the arguments as on the amount the accounts can bear during the proceedings.

The formal notice must state the cause, nature and amount of the sums claimed, the surcharges and penalties that apply to them and the period concerned; after an inspection, it also states the reference and dates of the letter of observations (Article R. 244-1). The Court of Cassation recalls that “it must state, on pain of nullity, the nature and amount of the contributions and levies claimed and the period to which they relate, without proof of harm being required” (Cass. 2e civ., 4 December 2025, No. 23-18.537, our translation).

The review must remain realistic. In that judgment, the reference to general scheme contributions, supplemented by a cross-reference to unemployment insurance and AGS contributions, was sufficient, the Court noting that the contributor could know its obligations; the decision, made in favour of URSSAF, is unfavourable to the contributor. Conversely, a formal notice covering supplementary surcharges without stating the nature or amount of the corresponding contributions was annulled, these omissions “did not allow the contributor to know the cause, nature and extent of its obligation” (Cass. 2e civ., 4 April 2018, No. 17-15.093, our translation).

The stakes are concrete: “the nullity of the formal notice prevents the collection body from pursuing, in the same proceedings, payment of the sums to which it relates” (Cass. 2e civ., 17 October 2024, No. 21-25.851, our translation). The firm therefore compares the letter of observations, the formal notice and, where applicable, the enforcement order line by line.

Yes, to challenge the formal notice or a decision of the agency that is subject to the preliminary appeal. Litigation in social security matters is preceded by a preliminary appeal, except for decisions that the law expressly excludes (Article L. 142-4); this appeal is brought before the appeals board within two months of notification of the contested decision (Article R. 142-1). In this field, going directly to the court risks inadmissibility. Opposition to an enforcement order follows other rules: it is brought directly before the court (Article R. 133-3), even without a prior informal appeal against the formal notice, as the next question explains.

The board is not required to reply quickly. If no decision has been brought to the applicant's attention within two months of receipt of the complaint, the applicant may treat it as rejected; if documents are produced afterwards, the period runs from their receipt (Article R. 142-6). The court is then seised by an application containing a brief statement of grounds and the documents listed in a schedule, accompanied by a copy of the contested decision or, in the case of implied rejection, by both a copy of the agency's initial decision and a copy of the preliminary appeal (Article R. 142-10-1).

The informal appeal is not a mere formality. It sets the first arguments, allows supporting documents to be produced and, for a company that acknowledges part of the debt, isolates what is really in dispute.

Yes. The Court of Cassation abandoned its earlier case law, held to be contrary to the right to an effective remedy, and now holds that “a contributor who has not challenged the formal notice before the appeals board may, in support of an opposition to the enforcement order issued on the basis of that notice, challenge the regularity of the procedure and the merits of the grounds of the enforcement order” (Cass. 2e civ., 22 September 2022, No. 21-11.862, our translation). A contributor who let the board's time limit pass therefore retains, through opposition, the possibility of disputing both the procedure and the substance.

The solution has a clear limit. A contributor who seised the board and then did not challenge its decision in time, despite having been informed of the routes and time limits for challenge, does not benefit from this opening: the Court expressly distinguishes that case in the same judgment.

This route does not remove the need for rigour. Opposition must be filed within fifteen days of notification or service, must be reasoned and must include a copy of the enforcement order (Article R. 133-3). It also shifts the burden of proof to the company, which must “prove that the claim whose recovery is pursued by the social security body is unfounded” (Cass. 2e civ., 4 December 2025, No. 23-17.270, our translation), a ruling unfavourable to the contributor.

By disputing the claim, and not only the ability to pay. The Court of Cassation approved a court that had held that, “as the person concerned merely referred to the lack of financial means to pay the sums detailed in the enforcement order, the amount of which was not disputed, the court rightly deduced that this opposition was inadmissible” (Cass. 2e civ., 26 June 2025, No. 23-10.784, our translation). That decision is unfavourable to the contributor. It also states, however, that “A court that declares inadmissible an opposition lodged against an enforcement order issued by a social security body exceeds its powers by ruling on the merits” (Cass. 2e civ., 26 June 2025, No. 23-10.784, our translation): the enforcement order could therefore not be validated in that judgment.

A useful opposition targets precise arguments: irregular or missing formal notice, limitation period, figures that do not match, contributions already paid, error in the contribution base. It is brought by filing at the court registry or by registered letter within fifteen days, with a copy of the enforcement order (Article R. 133-3).

The document notifying the enforcement order must itself be complete. Under the wording then applicable, the Court of Cassation overturned a decision of inadmissibility where “the deed of service of the enforcement order did not state that the opposition had to be reasoned on pain of inadmissibility, so that it did not fully indicate the means of challenge open to the contributor” (Cass. 2e civ., 30 January 2025, No. 22-17.211, our translation). The text now in force requires, on pain of nullity, the reference and amount of the enforcement order, the time limit for opposition, the address of the court and the manner of seising it (Article R. 133-3).

No, and this rule often surprises company directors. The Court of Cassation holds that “social security courts have no power to grant time to pay social security contributions and levies on the basis of Article 1244-1, now Article 1343-5, of the Civil Code” (Cass. 2e civ., 23 June 2022, No. 21-10.291, our translation). The judgment, made in respect of a self-employed person under the wording of Article R. 243-21 then applicable, dismisses the contributor's appeal to the Court of Cassation: the ruling is unfavourable to the contributor, and the court of appeal could not take the place of the agency.

Time to pay is a matter for the director of the collection agency, who may grant payment instalment plans and stays of enforcement for contributions, penalties and surcharges, subject to guarantees that the director assesses (Article R. 243-21). For an employer, this facility presupposes full payment over of the employee contributions due.

A serious request for an instalment plan therefore rests on a cash flow plan, proof that the employee shares were paid over and an offer of proportionate guarantee. The firm can prepare it alongside an appeal, without waiting for the outcome of the negotiation to act within the time limits for challenge.

The request is addressed to the director of the agency, the only person competent to grant instalment plans and stays of enforcement (Article R. 243-21). The text makes this favour subject to guarantees from the debtor, assessed by the director, and, for the employer, to full payment over of the employee contributions. A company that withheld the employee share without paying it over falls outside this framework.

Three elements make the request credible. A precise statement of the debt, distinguishing contributions, surcharges and penalties; a sustainable payment schedule, calculated from foreseeable receipts; a guarantee suited to the amount, whether surety, pledge or security over an asset. Immediate resumption of current contributions also counts, because a plan does not hold if a new debt builds up.

The plan has a useful effect on surcharges: a request for relief becomes admissible as soon as a repayment plan has been entered into, relief being acquired only if the plan is complied with (Article R. 243-20).

A late-payment surcharge of 5% applies to contributions not paid by the due date, to which is added a supplementary surcharge of 0.2% for each month or part of a month elapsed (Article R. 243-16). On an old debt, these sums weigh heavily.

The contributor may request relief, in whole or in part, as an act of grace. The request is admissible only after payment of all the contributions concerned or after a repayment plan has been entered into; the supplementary surcharge is waived only if the contributions were paid within thirty days of falling due, or exceptionally in the event of an irresistible and external event (Article R. 243-20). Certain surcharges linked to an inspection cannot be waived.

The director decides below a threshold set by order, the appeals board above it, and decisions are reasoned (same article). In insolvency proceedings, penalties, surcharges and enforcement costs due at the date of the judgment opening the proceedings are waived by operation of law, except in cases of undeclared work (Article L. 243-5).

Under ordinary law, social security contributions and levies are subject to a three-year limitation period from the end of the calendar year in respect of which they are due; for self-employed persons, the starting point is 30 June of the following year (Article L. 244-3). After an inspection, the period is suspended during the adversarial phase, which delays its expiry by the same amount.

Late-payment surcharges follow their own three-year period, from the end of the year in which the contributions that gave rise to them were paid or fell due (same article). The firm checks these dates item by item, because a time-barred period included in the formal notice is disputed separately from the rest.

Once the enforcement order has become final for lack of opposition, an action to enforce it is in principle subject to a three-year limitation period from its notification or service, or from an enforcement act served under that order (Article L. 244-9). This period is the one in the wording of the text in force on 1 November 2026.

These three-year periods, both for contributions and for enforcement of the enforcement order, are extended to five years where an offence of illegal work has been recorded in an official report (Article L. 244-11). In that case, the enforcement order relating to the sums assessed on that basis may also be enforced provisionally two calendar days after its notification or service, the opponent being able to ask the president of the court to stop that enforcement if there is a serious ground for invalidation and a risk of manifestly excessive consequences (Article L. 244-9).

URSSAF declares its claim like the other creditors. Claims of social security bodies that were not the subject of an enforceable title when they were declared are admitted on a provisional basis. Subject to judicial or administrative proceedings in progress, their final establishment must in principle take place, on pain of time bar, within the period provided for verification of liabilities; if the contribution base and calculation are still under way, the enforceable title must be issued within twelve months of publication of the opening judgment, and, if an inspection has been started, before the creditors' representative's end-of-mission report is filed with the court registry (Article L. 622-24 of the French Commercial Code (Code de commerce), in the wording in force on 1 November 2026).

The Court of Cassation draws a strict requirement from this: if no enforcement order is issued within the period set for verification of liabilities, the claim cannot be definitively admitted, “only that enforcement order being capable of constituting the enforceable title allowing definitive admission of the claim” (Cass. com., 14 January 2026, No. 24-21.494, our translation). The debtor's failure to dispute it changes nothing. Conversely, enforcement orders served before the opening allow definitive admission, and “the fact that in this case URSSAF declared its claims on a provisional basis, although it had already issued enforcement orders, was not such as to lead to the rejection of those claims” (Cass. com., 11 December 2019, No. 18-18.665, our translation), a ruling unfavourable to the debtor on this point; in the same case, the claims established by enforcement orders served out of time were rejected.

Insolvency proceedings wipe out certain accessory sums but keep the security attached to contributions. Penalties, surcharges and enforcement costs due on the day of the opening judgment are waived, except in cases of undeclared work (Article L. 243-5). However, contributions, surcharges and penalties remain secured by a preferential right over the debtor's movable assets (Article L. 243-4).

In judicial liquidation, the court may order the de jure or de facto directors to bear all or part of the shortfall in assets where a management fault has contributed to it; mere negligence is not enough (Article L. 651-2 of the French Commercial Code). Unpaid contributions are often among the matters relied on by the liquidator.

The court must nevertheless characterise the fault. In a case where the judgment noted unpaid social security contributions, preferential charges registered by URSSAF and an increase in debt, the Court of Cassation overturned the judgment against the director, those grounds being “unsuited to establish the continuation of a loss-making business, which cannot result from the mere finding of an increase in the amount of debts” (Cass. com., 11 December 2024, No. 23-19.807, our translation). An increase in debts alone, social security debts included, therefore does not establish the fault of continuing a loss-making business.

The director therefore has an interest in documenting, at the time of the difficulties, the measures taken: request for an instalment plan, monitoring of current payments, consultation of the chartered accountant, declaration of cessation of payments within the statutory period. The firm can analyse these elements before any liability claim is issued.

By a refund request addressed to URSSAF, which is subject to a three-year limitation period from the date on which the contributions were paid; the agency refunds within four months of the request (Article L. 243-6). Under the ordinary regime, the period is calculated payment by payment, and each month lost takes one instalment out of the scope of the request. The same article provides specific rules where the refund arises from a court decision revealing that the rule applied does not comply with a higher-ranking norm, or from a decision correcting the rate of the occupational accident and illness contribution, which opens the refund over the whole period corrected.

Ignorance of the error does not extend this period. The Court of Cassation holds that “Ignorance that the contributions paid were not due does not establish that the contributor was unable to act before the limitation period expired” (Cass. 2e civ., 6 April 2023, No. 21-19.111, our translation). The decision, which dismisses the company's appeal to the Court of Cassation, is unfavourable to it: contributions paid more than three years before the request were lost.

In practice, a periodic check of payroll and of the rates applied, carried out with the chartered accountant, makes it possible to detect overpayments while they can still be recovered. The firm can draft the request, then bring any refusal before the appeals board and the social security division.