Nullity of procedural acts in France

The nullity of a procedural act is not a mere technicality. It is the sanction that retroactively annihilates an act failing to meet the conditions of validity fixed by law – a badly drafted writ, an unsigned payment order, service effected on a person without standing. Well deployed, it brings down an entire procedural chain and offers the litigant who is weak on the merits an honourable exit. Poorly deployed, it is dismissed summarily by the court, leaving the practitioner who raised it in a weakened position for the rest of the debate.

The Code of Civil Procedure organises the entire regime around a central distinction: nullity for formal defect (Articles 112 to 116) and nullity for substantive irregularity (Articles 117 to 121). The two mechanisms have almost nothing in common – neither the conditions, nor the timing for raising them, nor the burden of proof, nor the possibility of regularisation. Confusing them is the primary source of failure in litigation.

Definition and distinction from neighbouring sanctions

Nullity is “the sanction striking a legal act when it lacks a condition of validity; the act is then retroactively annihilated.” In procedural context, it applies to acts performed by the parties – writs, submissions, payment orders, service, notifications – excluding acts of the court, which have a distinct regime.

The most common confusion opposes nullity to three neighbouring procedural sanctions:

• Inadmissibility (irrecevabilite): sanctions the lack of right of action. It targets the litigant, not the act. Since the Act of 17 June 2008, a ruling of inadmissibility retroactively destroys the interruption of limitation attached to the act (Article 2243 Civil Code), whereas a ruling of nullity preserves that effect (Article 2241, paragraph 2). This distinction alone justifies extreme precision in classification.

• Time-bar (forclusion): results from missing a deadline. The act is not irregular; it is out of time.

• Lapse (caducite): strikes a validly formed act subsequently deprived of an essential element. Unlike nullity, lapse does not benefit from the protection of Article 2241, paragraph 2 (Cass. 2e civ., 21 March 2019, No. 17-31.502).

The two regimes: formal defect and substantive irregularity

The 1975 Code broke with the excessive formalism of old law. It replaced the automatic “no nullity without text” rule with a nuanced system distinguishing two regimes with opposing logics.

Nullity for formal defect: three cumulative conditions

Article 114 establishes the conditions:

First condition: a text providing for nullity. Without a text, no nullity – subject to the exception for “substantial or public-policy formalities” (those conditioning the recipient’s understanding: party identity, claim object, date, officer’s signature). For these, nullity may be pronounced even without express text. But the exception is not a free pass: prejudice remains required.

Second condition: demonstrated prejudice. Article 114, paragraph 2, requires the party invoking nullity to prove the actual harm caused by the irregularity. Prejudice is never presumed: it must be concrete, actual, and directly linked to the defect raised. A mere inaccuracy, a typographical error that did not prevent the opponent from understanding the act – none of this constitutes prejudice. The Cour de cassation is consistent: the prejudice must characterise a genuine impairment of the rights of the defence.

Third condition: absence of regularisation. Article 115: “Nullity is cured by subsequent regularisation of the act if no time-bar has intervened and if the regularisation leaves no prejudice subsisting.” Regularisation is always possible for formal defects, provided the deadline for performing the act has not expired. The opponent must therefore raise the nullity promptly, before the other party has time to correct and re-serve the act.

Nullity for substantive irregularity: a more automatic sanction

The regime of substantive nullities obeys an inverse logic. Article 117 lists them limitatively – three cases:

• Lack of capacity to litigate: an unrepresented minor, an adult under guardianship acting alone.
• Lack of power: a person acting for another without a mandate – e.g., an association president signing a writ without board authorisation.
• Lack of capacity or power to represent a legal entity: a lawyer issuing proceedings on behalf of a dissolved company, or a representative whose authority has ended.

The procedural regime is much more generous for the party invoking them. Article 118: they may be raised “at any stage.” Article 119: “they must be upheld without the party invoking them having to demonstrate prejudice, and even where the nullity does not result from any express provision.” No text, no prejudice: it suffices to demonstrate the irregularity.

Article 120: the court must raise substantive irregularities of its own motion where they are of public policy (which includes lack of capacity to litigate). In other cases, it may do so.

Article 121: “Where susceptible of being cured, nullity will not be pronounced if its cause has disappeared at the time the court rules.” Regularisation must occur before the court rules, not after.

Timing: the in limine litis trap

Formal nullity must be raised before any defence on the merits (Article 74, the in limine litis rule). Article 113 adds that “any procedural nullity argument is excluded if its author has, subsequent to the criticised act, raised defences on the merits or opposed an inadmissibility ground.”

The logic is ruthless: the litigant who argues substance implicitly renounces reliance on formal defects. This rule particularly traps urgent proceedings (where substantive defences are articulated in haste) and proceedings with successive submissions (where a single earlier version touching the merits suffices to bar the nullity argument in the final version).

Substantive irregularities escape this rigour (Article 118: raised at any stage). They may be raised before the court of appeal for the first time.

Formal nullities must also be raised simultaneously (Article 116): one cannot invoke one, lose, then invoke another. Before the pre-trial judge (Articles 789 CPC), failure is irrecoverable – the pre-trial judge has exclusive jurisdiction, and any exception not raised before them is lost.

Effects of annulment: retroactivity, survival, propagation

Annulment operates retroactively: the act is deemed never to have existed. But three questions invariably follow:

1. Interruption of limitation: Article 2241, paragraph 2, provides that the interruption produced by a court action endures even if the act is annulled for formal defect or irregularity. This is a crucial protection: unlike inadmissibility (which destroys the interruption under Article 2243), nullity preserves it.

2. Propagation: where the annulled act is the foundation of subsequent acts (an annulled writ of summons upon which the entire proceedings rests), all subsequent acts may fall. The court assesses whether the subsequent acts can survive independently.

3. Possibility of re-issuing: annulment does not extinguish the right of action. The claimant may re-issue proceedings, provided limitation has not expired – and Article 2241 ensures it typically has not.