Filing an insurance claim by fax: deadlines, evidence, best practices

Short answer: after a loss, the law does not ask you to be right, it asks you to have given notice on time. Article L113-2 of the French Insurance Code sets a minimum deadline of five working days for most claims, reduced to two working days in case of theft and extended to ten days after a natural disaster order is published in the Official Journal. Fax ticks the three boxes that matter in this race against the clock: it goes out immediately, it arrives on a number the company itself publishes in its general terms and conditions, and it generates a time-stamped transmission report showing the number dialled, the date, the time and the number of pages received. The protocol comes in four stages: first declare the essentials within the deadline, then complete the supporting documents, keep the transmission report together with an exact copy of the pages sent, and back it up with registered mail if the financial stakes are high. What loses a case is almost never the substance: it is a late notification that cannot be dated.

What the Insurance Code actually requires

Many policyholders believe that a claim filed after the deadline is automatically refused. The reality is more nuanced, and it is better to understand that nuance before you need it.

Article L113-2 requires the policyholder to "give notice to the insurer, as soon as they become aware of it and at the latest within the period set by the contract, of any loss likely to trigger the cover". This contractual deadline cannot be shorter than five working days — a contract providing for three days would be unenforceable on that point. The exceptions are well known: two working days for theft, ten days for natural disasters from the publication of the order, five days for livestock mortality in agricultural policies.

The sanction is framed by the final paragraph of Article L113-2: forfeiture of cover for late notification can only be invoked if it is provided for in the contract and if the insurer demonstrates that the delay caused it prejudice. In other words, a notification made on the eighth day instead of the fifth does not cost you compensation if nothing changed in the meantime. But if the delay prevented the loss adjuster from establishing the origin of a leak because repair work had already started, the discussion becomes very different.

Hence the practical rule: dating your submission is often worth more than its content. A brief initial notification sent the same day, followed by a complete file a week later, is infinitely more robust than a perfect file sent on the twelfth day.

Why fax still has a place in this particular scenario

Fax seems anachronistic until the day you need to prove that a document went out at a specific time. Three qualities make it relevant for filing a claim.

It is published. Open your general terms and conditions: almost all insurers still list a fax number for claims, alongside the postal address and sometimes a customer portal. A number published in the contract is a contractually accepted channel — the insurer will find it hard to dispute having received a document on a number it provided itself.

It is instantaneous and dated at source. Unlike registered mail, where the trip to the post office can cost you a day, a fax goes out at once. The transmission report is generated by the network, not by you: it carries the remote equipment identifier (CSID), the number of pages actually received and the time the connection was established.

It does not depend on a customer portal. After a storm or a regional flood, insurers' platforms become saturated, apps crash, call centres are unreachable. Fax uses a different infrastructure and often gets through when everything else is overloaded.

That said, let us be honest: fax is not proof of content. It proves that a number of pages was transmitted to a given number, not what those pages said. We covered this limitation in detail in our article on the evidential value of fax before a judge: the transmission report is prima facie written evidence, which the judge weighs alongside the other elements of the file. That is precisely why the retained copy of the pages sent matters as much as the report itself.

Deadlines by type of claim

Working days exclude Saturdays, Sundays and public holidays: a theft discovered on Friday evening gives you until Tuesday evening. Do not count on that margin, it melts away fast over a long weekend.

The four-stage protocol

1. Notify first, document afterwards

In the hours following the loss, send a one-page minimum notification. It must contain seven pieces of information: your first and last name, the policy number, the address of the insured risk, the date and time of the loss, its nature in one sentence, a rough estimate of the damage, and your direct phone details. Close with a protective formula: "Supporting documents and the detailed statement of losses will be sent to you as soon as possible."

This single page is enough to satisfy the legal deadline. The rest can follow.

2. Build your evidence file while the traces still exist

Damage fades: water dries, plaster is scraped off, furniture goes to the tip. Photograph before cleaning up, generously, with both wide shots and close-ups. A simple phone will do, but if you need to document a leak in a crawl space, a ceiling or a service duct, a rechargeable LED torch completely transforms the quality of the photos. For damp behind a partition wall, a moisture meter for walls provides numerical readings that carry real weight with a loss adjuster — far more than an impression of a "wall that smells mouldy".

Keep the damaged items until the adjuster has visited, even if they are unusable: destroying them prematurely is one of the most common grounds for dispute.

3. Send cleanly, with legibility in mind

A fax is a black-and-white image, often at 200 dpi. A colour photo sent by fax becomes an illegible grey smudge. Two practical consequences:

• Never fax photos: mention them in the notification and send them through the channel the insurer indicates (customer portal, email, USB stick handed to the adjuster).
• Fax the text, the joint statements, the invoices, the quotes, the receipts. These documents come through perfectly.

Scan properly: a document scanner with automatic feeder handles a stack of ten invoices in a minute and produces a clean PDF, whereas a photo of a document taken at an angle gives a warped, dubious-looking fax. If you are on site, in damaged premises, without reliable power, a battery-powered portable scanner does the job.

On the cover sheet, state the total number of pages. It sounds trivial, but it is what later lets you demonstrate that a missing page is not your fault: the transmission report will show "6 pages" against your stated "6 pages".

4. Archive the triptych

After sending, immediately assemble an inseparable set of three elements:

1. the transmission report (PDF or acknowledgement from the online service interface);
2. the exact copy of the pages sent, in order;
3. a three-line context note: who sent it, from which device, to which number found where.

This triptych is what your lawyer or ombudsman will look at eighteen months from now. Our detailed retention recommendations are set out in the article devoted to archiving faxes with evidential value.

The six mistakes that cost you dearly

Waiting for the final costing. No legal text requires the notification to contain an exact amount. The statement of losses may be "provided as soon as possible" (Article L113-2, 4°). Waiting for the plumber's quote before filing means losing the deadline for nothing.

Sending to the wrong recipient. The head office fax is not the claims department fax, which is not the broker's fax. Take the number from your general terms and conditions or your premium notice, never from an email you received or a search engine result. Sending to the wrong number is not merely ineffective: it is a data breach. We described what to do in what to do after a fax sent to the wrong number.

Forgetting to report a theft to the police. Without the police report receipt, theft cover does not kick in. A complaint can be filed at any police station or gendarmerie, and the online pre-complaint speeds up the counter visit.

Faxing health data without precautions. A personal injury claim, an initial medical certificate or a sick note fall under Article 9 of the GDPR. Minimise: send the certificate, not the whole medical file, and prefer a personal service over a shared machine at the office.

Throwing away damaged property. Even soaked, even broken. The adjuster must be able to inspect it.

Keeping no record of the phone call. Many claims are first reported by telephone. That is useful, but a call cannot be proved. If you have called, confirm in writing the same day, restating the time of the call and the name of the person you spoke to.

Fax, registered mail, customer portal: the right combination

There is no single ideal channel. There is a combination suited to the financial stakes.

• Small claim (broken glass, minor water damage): customer portal or a simple fax, keeping the transmission report. No need to bring out the heavy artillery.
• Medium claim (water damage requiring repainting, theft of professional equipment): fax the same day to satisfy the deadline, then the full file via the customer portal or by email. The fax acts as a time marker.
• Major or contentious claim (fire, collapse, foreseeable refusal, high-stakes commercial policy): immediate fax and registered letter with acknowledgement of receipt, or a registered electronic letter compliant with the eIDAS regulation. Unlike fax, the registered electronic letter proves receipt and the integrity of the content.

This hierarchy is developed in our comparison of acknowledgements of receipt: fax, registered electronic letter or email. In the event of a persistent disagreement with your insurer, free recourse to La Médiation de l'Assurance remains available once the complaints department has been exhausted, and the official France Assureurs website publishes the applicable industry conventions, notably the IRSI convention for water damage and fires below €5,000 excl. VAT in multi-occupancy buildings.

Preparing before the loss: the file you will not have time to build afterwards

The best claim file is prepared while everything is fine. Three habits are enough.

Once a year, photograph the rooms of your home or premises, along with your valuables, and keep those images off-site — an encrypted external hard drive stored somewhere other than the insured address prevents you from losing the evidence along with the property. Keep the purchase invoices for expensive equipment in a dedicated folder; a fireproof archive box is a modest investment compared with what it protects, and it also serves for notarial deeds and contracts.

Finally, note on a single sheet: policy number, claims department fax number, 24/7 assistance number, broker's name. The day water starts pouring from the ceiling at 10 p.m., that sheet will save you the hour you will not have.

Frequently asked questions

Is a fax enough to prove I filed within the deadline?

It constitutes serious evidence, not irrefutable proof. The transmission report establishes that a connection did take place with the claims department's number on a given date and time, which is exactly what an insurer invoking lateness disputes. Combined with a copy of the pages sent, it is generally accepted. For high stakes, back it up with registered mail.

Can an insurer refuse a claim received by fax?

Hardly, if it publishes a fax number itself in its general terms and conditions or on its premium notices. Article L113-2 imposes no particular form: it refers to "notice", not to a registered letter. Nevertheless, check whether your contract contractually requires a specific form for certain covers.

What should I do if my fax fails, with a busy line or an error?

Keep the failure report, it dates your attempt. Try again, then switch immediately to another channel — customer portal, claims department email, registered mail — mentioning the failure and its time stamp. A documented attempt on day one beats a success on day seven.

Should I fax the photos of the damage?

No. Fax degrades images to the point of making them unusable. Mention their existence in the notification and send them through a channel capable of reproducing colour and definition, or hand them to the adjuster during the visit.

Can I file a claim for a property I rent?

Yes, and as a tenant it is even your obligation under compulsory home insurance. At the same time, inform the landlord or the managing agent, especially if the damage originates in the common areas. Notification rules in co-ownership buildings are covered in our article on fax, the managing agent and co-ownership.

Do the deadlines also apply to businesses?

Yes, with some particularities: commercial multi-risk policies often set stricter deadlines and evidence-retention obligations, notably for business interruption. Check the clauses relating to notification and adversarial loss assessment before the loss occurs, not afterwards.

In summary

• The deadline outweighs completeness: a one-page notification sent the same day beats a perfect file sent on the twelfth day.
• Two working days for theft, five for most claims, ten after a natural disaster order — working days, so weekends excluded.
• Fax provides an immediate network time stamp, enforceable, on a number the insurer publishes itself.
• It does not prove content: always keep the exact copy of the pages sent along with the transmission report.
• Do not fax photos, they become illegible; fax joint statements, invoices, quotes and receipts.
• For a major or foreseeably contentious claim, back up the fax with a registered letter or an eIDAS-compliant registered electronic letter.
• Prepare before the loss: annual photographic inventory, filed invoices, contact sheet within reach.

To check service availability for your insurers' numbers and the destinations covered, see the available countries page; practical sending questions are gathered in our FAQ.