Fax and French Labour Courts: Meeting the Deadlines

Short answer: before the conseil de prud'hommes (the French labour court), what loses a case is almost never weak arguments — it is a missed limitation period or evidence disclosed too late. The Labour Code locks most employment disputes into short windows: twelve months to challenge the termination of an employment contract (article L. 1471-1), twelve months for a redundancy, three years for unpaid wage claims (article L. 3245-1), two years for actions concerning the performance of the contract, such as challenging a disciplinary sanction (article L. 1471-1). Fax serves four very specific purposes within that calendar. Sending the registry a document or supporting paper requested the day before a hearing, when post will not arrive in time. Confirming in writing to your lawyer, the employer or the union representative something said over the phone. Formally notifying the employer of a challenge, a request for end-of-contract documents, or a constructive dismissal claim. And responding to a summons from the conciliation and case-management panel when the postal notice arrived late. For everything else, the procedure runs through the registry, the Portail du justiciable, registered post, and the e-Barreau network between lawyers. The rule to carve in stone: a fax proves that you wrote on a given date using those exact words; it never amounts to filing a claim or to proper disclosure of evidence.

Why the deadline is the real risk, not the merits of the case

A dismissed employee thinks about the injustice. The court will look first at the date on the postmark.

Since the ordinance of 22 September 2017, article L. 1471-1 of the Labour Code has cut to twelve months from notification of the termination the time limit for challenging a dismissal, an approved mutually agreed termination, or a constructive dismissal. Before 2017, it was two years. Many employees — and a few employers — still reason on the old calendar. The axe falls without debate: once the deadline has passed, the claim is inadmissible, however serious the facts.

Three traps hide inside this structure.

The first: the time limits are not uniform. A single case may combine a dismissal challenge (12 months), a claim for unpaid overtime (3 years, article L. 3245-1), a claim for damages for harassment (5 years, article 2224 of the Civil Code) and a challenge to a final settlement statement (6 months if the receipt was signed, article L. 1234-20). Filing too late on one of these heads does not kill the others, but experience shows that employees often file a single bundle, late, and lose the biggest item.

The second: the starting point is treacherous. For termination, it is notification, not the preliminary interview or the end of the notice period. For wages, it is the due date of each payslip, month by month. For a sanction, it is the date it was handed over. The date on your employer's registered letter is therefore a legal fact of the first order: it deserves to be scanned, time-stamped, and filed in the same place as the contract.

The third: a claim cannot be filed by fax. This is the point everyone gets wrong. The labour court is seised by a written application delivered or sent to the registry (article R. 1452-1 of the Labour Code), together with Cerfa form no. 15586, or online through the Ministry of Justice's Portail du justiciable. A fax sent to the registry does not interrupt the limitation period: it has no status as a filing document. Believing otherwise means losing your claim while thinking you are protected.

What fax genuinely does well in an employment dispute

That said, in the day-to-day life of a labour court case, fax delivers four services nothing else provides as fast.

1. Sending the registry a document the day before a hearing

A labour court registry still handles paper. Many courts — particularly in the managerial-staff division — still accept a fax for a single document: a corrected France Travail (formerly Pôle emploi) certificate, a medical certificate, proof of address, a request for adjournment. The advantage fits in one line: you get a time-stamped transmission report within the minute, whereas ordinary post leaves no trace at all and registered post takes two days.

Call the registry before sending. Ask for the fax number and the case file number (RG), and write that number large on the cover sheet. A document arriving without an RG number in a registry handling several thousand files ends up in a tray, not in the file.

2. Confirming in writing what was said over the phone

Between an employee, their lawyer and a union representative, a great deal is decided orally. A written trace protects both sides. A one-page fax summarising "you informed me today that the conciliation hearing is set for 14 November and that the 2024 payslips must reach you before 30 October" serves as shared memory, and its cover sheet carries a time.

3. Notifying the employer of a formal act

A request for end-of-contract documents, a challenge to a sanction, a formal demand to pay a balance, a request to reclassify a fixed-term contract: these are documents where the date of dispatch matters. Registered post remains the benchmark, but fax has one advantage of its own: it goes out at 7 p.m. on a Friday or on a Sunday, when the post office is shut and the deadline expires on Monday. The safe practice is to always double up: fax on the day, registered letter the next morning, with the wording "confirmation of our fax of [date], sent at [time]".

4. Responding to a summons received late

Summonses from the conciliation and case-management panel (bureau de conciliation et d'orientation, BCO) are sent by registered post. A move, an absence, a delivery notice left uncollected, and the employee discovers the summons five days before the hearing. Requesting an adjournment, reporting a medical impossibility, appointing a representative: fax makes it possible to put a dated document on file before the hearing, which no letter would have achieved in time.

What fax will never do for you

The table below sets out the boundary. It is sharp, and blurring it costs cases.

Two points deserve expanding.

Disclosure of evidence is governed by the adversarial principle. Article 15 of the Code of Civil Procedure requires that submissions, evidence and arguments be disclosed "in good time". Before the labour court, that means a numbered schedule of evidence (bordereau de communication de pièces), handed to the opposing party and to the court. Faxing twenty documents the day before the hearing, with no schedule, risks having them struck out of the proceedings: the court will simply disregard material that was nonetheless decisive. Fax can accompany disclosure; it can never replace it.

On appeal, the procedure is digital and closed. Before the social division of the court of appeal, representation by a lawyer (or a union representative) has been mandatory since the decree of 20 May 2016, and filings go through the lawyers' virtual private network (RPVA). A fax sent to the court of appeal registry has no procedural effect whatsoever.

Organising your proof of transmission: a method that holds for ten years

A fax transmission report is only worth something if it is findable and consistent with the rest of the file. In employment litigation, a dispute can run for several years across filing, judgment, appeal and enforcement. Three habits are enough.

Build a single chronological file. One folder or lever arch file per case, holding side by side the document sent, its cover sheet and the transmission report. Labour courts rule on paper evidence: a file presented with numbered dividers saves considerable time at the hearing and avoids the "I can't find exhibit 12" moments that wreck an oral argument.

Digitise immediately. A portable scanner with an automatic document feeder turns a stack of employer letters into cleanly named PDFs in ten minutes. Name your files YYYY-MM-DD_subject_recipient.pdf: chronological sorting then happens by itself, and you find a document by its date, which is precisely what the judge will be looking for. Our guide on how to digitise your paper documents sets out the precautions that keep a copy legally robust.

Back up somewhere other than your work computer. It is obvious yet too often ignored: an employee in dispute no longer has access to their work email, sometimes overnight. An encrypted external hard drive kept at home shields the file from a loss of access and from a computer failure. On retention periods, see our article on archiving fax confirmation reports.

Confidentiality: a labour court file is a sensitive file

An employment dispute carries heavy personal data: payslips, sick notes, occupational-health unfitness opinions, sometimes health information or named witness statements from colleagues. The CNIL points out that health data falls within the special categories of article 9 of the GDPR and calls for reinforced safeguards.

Three practical reflexes.

• Check the number twice. A fax sent to the wrong department means a payslip sitting in an unknown tray. We set out what to do if that happens in what to do after sending a fax to the wrong number.
• Never leave printouts lying around. At the office as at home, a cross-cut shredder costs less than a data breach, and stops a witness statement ending up in a shared bin.
• Anonymise whatever can be anonymised. A statement from a colleague still in post exposes its author. Discuss with your lawyer what must go in as evidence and what can be held back.

For sending from home, a rigid document carrying case protects originals from creasing and damp between appointments — a trivial detail until the day an original employment contract comes back unreadable.

The typical case timeline, from dismissal to hearing

Here is how the dates you cannot miss follow one another in practice.

1. Day 0: notification of dismissal by registered post. Scan the envelope and the acknowledgement of receipt: they fix the starting point.
2. Day 15: request for clarification of the grounds, available since the 2017 decrees (article R. 1232-13). The employer has fifteen days to reply. It is a short letter, to be sent fast — fax usefully doubles the registered letter.
3. Within one month: delivery of end-of-contract documents (work certificate, France Travail certificate, final settlement statement). If late, serve a formal demand.
4. Within 6 months: challenge the signed receipt for the final settlement, if you signed it (article L. 1234-20).
5. Within 12 months: file with the labour court to challenge the termination. Not one day more.
6. Summons to the BCO: conciliation and case-management hearing, generally one to three months after filing, depending on the court.
7. Case preparation: exchange of evidence and submissions according to the timetable set. This is where documentary discipline pays off.
8. Trial hearing, then deliberation.

A paper diary dedicated to the case, or a simple sewn-binding notebook in which you record every call, every dispatch and every reply with its date, beats memory. Labour court judges respond well to a dated, documented narrative; they respond far less well to a chronology reconstructed at the hearing.

Frequently asked questions

Can you file a labour court claim by fax?

No. A claim is filed by a written application delivered or sent to the registry (article R. 1452-1 of the Labour Code), with Cerfa form no. 15586, or online through the Portail du justiciable. A fax does not constitute a filing document and does not interrupt the limitation period.

Does a fax transmission report carry weight before the court?

It constitutes prima facie written evidence of dispatch: it attests that a document of a certain number of pages was transmitted to a given number, on a given date and at a given time. On its own it does not prove the exact content received. Hence the rule: keep the document sent, its cover sheet and the report together. We set out that reasoning in does a fax carry evidential weight before a judge.

Can my employer notify me of a dismissal by fax?

Article L. 1232-6 of the Labour Code requires a registered letter with acknowledgement of receipt, or delivery by hand against signature. A dismissal notified by plain fax is procedurally defective. That said, a defect of form does not necessarily void the dismissal: it gives rise to a separate award of compensation. So do not rely on it as your main argument.

How long must I keep my documents after judgment?

For as long as appeals or enforcement remain open, and reasonably ten years for enforceable wage claims. Payslips, for their part, should be kept indefinitely: they are used to calculate your pension. France Travail and the Assurance retraite say so consistently.

Is fax accepted by every registry?

No, and practice varies from one court to another. Some registries no longer publish a fax number; others accept one for single documents. Call first. And whatever the answer, confirm by conventional means.

In summary

• The deadline is the real opponent: 12 months to challenge a termination, 3 years for wages, 6 months for a signed receipt for the final settlement, 2 years for actions concerning the performance of the contract, such as a disciplinary sanction.
• Fax does not file your claim and interrupts no limitation period: filing goes through the registry (Cerfa 15586) or the Portail du justiciable.
• It excels at four uses: an urgent document to the registry, confirmation of an oral exchange, formal notification to the employer in the evening or at the weekend, and a reply to a summons received late.
• Disclosure of evidence is governed by the adversarial principle: a numbered schedule, in good time. A bulk send the day before the hearing risks being struck out of the proceedings.
• Always double up: fax on the day, registered letter the next, with explicit reference to the fax.
• File the document + cover sheet + transmission report together, digitise, and back up away from your employer's equipment.
• A labour court file contains sensitive data: check the number, shred printouts, and talk anonymisation through with your lawyer.

To send a document without a machine or a subscription, our online fax sending service works without registration, and the FAQ answers questions about formats, pagination and confirmation reports.