Fax, notaries and public procurement: proving when a submission arrived

Short answer: in a public tender just as in a notarial transaction, what loses a file is almost never its content — it is the time at which it arrived. Since 2018, any bid for a public contract above the €40,000 (excl. VAT) threshold must be submitted through the buyer profile, and a fax is no substitute for the platform: Article R. 2132-7 of the French Public Procurement Code (Code de la commande publique) makes the electronic channel mandatory, and a faxed bid is in principle irregular. Fax, however, remains formidably useful around the submission: requests for clarification before the deadline, reporting a platform failure that needs a timestamp, serving a claim memorandum, a summons or a formal notice addressed to a notary, running out a cooling-off period, responding to a pre-empted DIA (declaration of intent to sell). Its strength rests on a single object: the transmission report, which carries the number dialled, the date, the time, the duration and the number of pages actually received by the remote machine. But you still need to know what it proves — and what it does not.

What a fax proves, and what it does not

This distinction has to be made up front, because everything else follows from it.

A fax transmission report establishes that a communication took place, on a given date and at a given time, with equipment reachable at the number dialled, and that n pages were negotiated and then acknowledged by the receiver under the ITU's T.30 protocol. It is a technical fact, verifiable, generated by a machine with no stake in the matter.

What it does not establish, on the other hand:

• that the content received is identical to the content sent — the report counts pages, it does not certify their text;
• that a natural person actually read it;
• that the number dialled really belongs to the alleged recipient, unless proven by other means.

French law settled this long ago: a fax is a beginning of proof in writing within the meaning of Article 1362 of the Civil Code, which can be corroborated by other evidence, and not an instrument bearing an electronic signature within the meaning of Article 1367. The Cour de cassation has repeatedly accepted it as admissible evidence between merchants, with the freedom of proof under Article L. 110-3 of the Commercial Code applying in full. Before the administrative courts, the reasoning is similar: a fax is admissible as evidence of fact, but it cannot on its own make a bid regular when it was submitted outside the mandated channel.

Hence a simple operational rule: a fax dates, it does not certify. That is a great deal, but it is not everything. We developed this logic in our article on the evidentiary value of a fax before a judge, and it remains the foundation of everything that follows.

Public procurement: fax is not a submission channel

Let us go back to the texts, because confusion here is expensive.

Article R. 2132-7 of the Public Procurement Code requires, for contracts whose estimated value is equal to or greater than €40,000 excl. VAT, that applications and bids be transmitted electronically via the buyer profile designated in the contract notice. A fax is not a buyer profile. A bid sent by fax in that context is set aside as irregular — and the bidder has no useful remedy, administrative case law regularly recalling that submitting outside the mandated channel is the tenderer's own responsibility.

Below €40,000 excl. VAT, and for contracts awarded under an adapted procedure that expressly allows it, the buyer may accept other means of transmission. Read the tender regulations (règlement de consultation) article by article: they are the governing text. If they mention "any means giving a certain date to receipt", fax becomes viable again — provided you keep the report.

Uses where fax retains real value

The most interesting case remains the platform outage. The Public Procurement Code provides for the "backup copy" (Article R. 2132-11): a copy on physical or electronic media sent in parallel, opened only if the electronic submission is corrupted or fails to arrive on time. It is sent by registered post or delivered against receipt — never by fax. But if the buyer profile goes down at 11:40 for a 12:00 deadline, a fax sent immediately to the procurement department describing the incident with a time-stamped screenshot is exactly the kind of evidence the pre-contractual interim relief judge looks at. It does not save you automatically: it spares you having to prove the incident after the fact on your word alone.

For that reason, serious procurement units keep a dedicated machine. A laser fax unit with receive memory connected to a line independent of the IP infrastructure remains, in a construction SME, the only channel still working when the fibre is cut by a digger on the neighbouring site. This is not nostalgia: it is redundancy.

Notaries: the race to run out the clock

The notary's office is the other arena where the time of arrival is everything.

Three deadlines structure most property transactions:

1. The ten-day SRU cooling-off period (Article L. 271-1 of the Construction and Housing Code), which runs from the day after the notification is first presented to the non-professional buyer.
2. The response period for the holder of the urban pre-emption right, two months from the municipality's receipt of the DIA.
3. The conditions precedent in the preliminary sale agreement — obtaining a loan first among them, generally 45 to 60 days.

In all three cases, what counts is not the signature but the certain date. And that is precisely where practice splits between what the law requires and what firms actually do.

The SRU notification must be made by registered letter with acknowledgement of receipt, or electronically under the conditions of Article 1126 of the Civil Code — a fax will not do, and the case law is consistent. Trying to run out a cooling-off period by fax means risking that the period never starts at all, and seeing the buyer withdraw six months later. It is the costliest mistake in the file.

Around that formal notification, however, fax does render service: urgently transmitting a loan offer certificate on the last day of a condition precedent, sending a mortgage register extract to a colleague, passing on escrow account bank details to a bank that refuses email attachments, replying to a bailiff's summons. The common thread: these are informational acts, not notifications producing an autonomous legal effect.

The three-dispatch reflex

Firms that never lose a file apply a three-step protocol, and it is worth describing because it transposes to any time-sensitive matter:

• The dispatch that produces legal effect: registered post, delivery against receipt, or an electronic registered letter compliant with the eIDAS Regulation. That is what starts or extinguishes the deadline.
• The dispatch that informs quickly: fax or email, sent the same day, so the recipient knows. The transmission report proves diligence.
• The dispatch that archives: a reliable copy of everything above, filed with its metadata.

This separation between the act and the information is the key. You will find it again in our comparison of acknowledgements of receipt: fax, electronic registered letter or email, and it prevents ninety per cent of misunderstandings about what a dispatch actually achieves.

Building proof of submission that holds up

A lone transmission report, printed on thermal paper and slipped into a folder, is worth very little three years later. Here is what turns a technical trace into usable evidence.

1. Bind the report to the pages sent

The structural weakness of fax is that the report says "12 pages" without saying which ones. Fix it: keep, in the same digital container, the exact PDF transmitted and the transmission report. A serious online fax service does this automatically by linking the acknowledgement to the object sent — one of the ten criteria we detailed in our guide to choosing an online fax provider.

2. Time-stamp in a way that can be relied on

The sending machine's timestamp is set by its owner: it is worthless against them. The NF Z42-013 standard, taken up by ISO 14641, and the eIDAS Regulation with its qualified time-stamping provide the answer: a time stamp issued by a trusted third party and applied to the container. In practice, most online fax offerings rely on a synchronised and logged NTP server, which is already far better than the clock of an office machine last set in 2014.

3. Stop the medium from degrading

The thermal paper of old fax machines fades within eighteen months in an exposed office. If your file has to survive a five- or ten-year limitation period, digitise it immediately. A duplex scanner with automatic document feeder processes a whole folder in a few minutes and produces usable PDF/A files; paired with an acid-free archival sleeve for the few originals worth keeping, it settles the question of the medium. We described the full method in archiving your faxes and keeping their evidentiary value for ten years.

4. Keep a log at organisation level

Maintain a register of time-sensitive dispatches: date, time, file, recipient, primary channel, duplicate channel, report reference. A simple bound correspondence register is enough in a small practice, a shared spreadsheet in a larger one. The point is not administrative: in litigation, it demonstrates a consistent practice, which strengthens the credibility of every individual document.

5. Check the number, every time

One wrong digit in a procurement unit or a notary's office and a draft sale agreement lands with a stranger. Take the number from the tender regulations or the organisation's official directory, never from the signature block of an email you received — that is the classic vector of supplier impersonation fraud. If the mistake happens anyway, the emergency protocol is set out in our article on a fax sent to the wrong number.

The special case of pre-contractual interim relief

One last point, often overlooked by SMEs.

When an unsuccessful bidder challenges a procedure, there is a minimum eleven-day period between notification of rejection and signature of the contract (Article R. 2182-1 of the Public Procurement Code) — the famous standstill. Filing for pre-contractual interim relief during that period automatically suspends signature, provided the contracting authority is informed.

That information must reach the buyer quickly, and must be datable. In the practice of public law firms, notification of the filing goes out through three simultaneous channels: Télérecours for the court, email to the buyer, and fax to the procurement department. The fax is there for a precise reason: it arrives at a number the buyer itself published in the contract notice, and it generates a report time-stamped to the minute, independent of the opposing party's email logs. When the point at issue is proving that you gave notice before 4:30 p.m. on a Friday, that minute is worth the whole case.

Frequently asked questions

Can a faxed bid for a public contract be regularised?

No, in principle. Above €40,000 excl. VAT, electronic submission via the buyer profile is a mandatory method of submission, not a mere formality. The buyer may request regularisation of a bid that is irregular in its content under an adapted procedure or where negotiation is allowed, but not of a submission made outside the correct channel. The only workaround provided by the texts is the backup copy, and it has its own formal rules.

Is the transmission report enough to prove what was sent?

No. It proves that a number of pages was transmitted at a given time to a given number. To prove the content, you must attach the source file, ideally sealed with a digital fingerprint and a qualified timestamp. It is the combination of the two that makes solid evidence, not the report alone.

Can a notary run out an SRU cooling-off period by fax?

No. Article L. 271-1 of the Construction and Housing Code requires a registered letter with acknowledgement of receipt, hand delivery against signature in the cases provided for, or electronic notification compliant with Article 1126 of the Civil Code. A fax does not start the ten-day clock and leaves the transaction exposed to a late withdrawal.

Is fax GDPR-compliant in a property file?

It can be, subject to conditions. The documents in a preliminary sale agreement contain identity data, income data and sometimes health data (borrower's insurance). The minimisation principle in Article 5 of the GDPR requires transmitting only the necessary pages, and the channel must be controlled: a named online fax arriving in an identified mailbox is infinitely better than a shared machine in an office corridor.

How long should a transmission report be kept?

Align the retention period with the limitation period for the matter. Five years for ordinary contractual liability claims (Article 2224 of the Civil Code), ten years for the decennial guarantee in works contracts, thirty years for certain real property actions. When in doubt, ten years is the operational benchmark used by most legal departments.

In summary

• Above €40,000 excl. VAT, a public tender is submitted via the buyer profile: a faxed bid is irregular, with no way to catch up.
• Fax retains real value around the submission: malfunction alerts, claim memoranda, notification of a pre-contractual interim relief filing.
• At the notary's office it informs quickly but starts or ends no deadline: SRU notification requires registered post or a compliant electronic registered letter.
• The transmission report dates a communication; it certifies neither the content nor that it was read: always attach the source file.
• The three-dispatch protocol — the act, the information, the archive — eliminates most procedural disputes.
• Qualified time-stamping, immediate digitisation of thermal prints and a dispatch register turn a technical trace into evidence you can rely on.

To compare the options depending on your sending country, see the available countries page, and the FAQ answers practical questions about accepted formats and dispatch size.