Fax and real estate in 2026: notaries, agencies, property managers

Short answer: in French real estate, the fax has not disappeared — it has taken refuge in the handover points where timestamping matters and where the other party is a public authority or a large organisation: declarations of intent to sell (DIA) sent to the town hall, exchanges with certain notarial practices and their conveyancing departments, building management firms that still run their mandates by fax, bank lien-release and collections departments. None of these transmissions requires a physical fax machine: an online fax service produces the same T.30 signal at the receiving end, with a timestamped transmission report you can file with the case. What changes is your ability to prove the sending — and that is a matter of organisation, not hardware.

A 2026 estate agent works on a transaction platform, signs electronically, exchanges documents through a secure client portal. Then comes the Monday morning when the planning department of a village of 4,000 replies that "the DIA, we take it by post or by fax." Or the assistant at a provincial notarial practice who asks for the power of attorney "by fax, it's faster than the post." Or a bank's lien-release department whose only documented channel for the past twelve years has been a number starting with 01.

This is not nostalgia: it is administrative infrastructure that has not moved at the same pace as commercial tools. Here is the map of what remains, and how to handle it properly.

Where the fax still holds out in a transaction

The declaration of intent to sell and clearing the pre-emption right

This is the best-documented use case. When a property falls within the scope of an urban pre-emption right, the notary — or sometimes the instructed agency — sends a DIA to the local authority, which then has two months to decide (articles L.213-2 et seq. of the French planning code). The clock starts running from the receipt of the declaration.

Since 2018, online filing and paperless submission have been available, and many municipalities now accept electronic filing. But "many" is not "all." In small municipalities without a digital planning portal, the instructions posted at the town hall still list a fax number alongside registered post. When the date of receipt drives the timetable of a preliminary sale agreement, you use the channel the authority recognises, not the one you would prefer.

The habit to build: keep the transmission report together with the acknowledgement of receipt. A report showing the time, the number dialled and the number of pages transmitted is not an acknowledgement of receipt in the postal sense, but it is solid evidence, and administrative courts have already accepted it as prima facie proof of sending.

Notarial practices and their conveyancing departments

French notaries have a robust internal network — the platform run by the Conseil supérieur du notariat, the electronic authentic instrument, filing with MICEN. For exchanges between practices, the fax has receded very considerably.

But the interface with the outside world is less consistent. An estate agent, a chartered surveyor, a property surveyor or a private individual who has to send a document to a practice sometimes runs into long-standing instructions: signed power of attorney, certificate of non-remarriage, waiver by a co-owner of undivided property, bank details for payment of the price. Some conveyancing assistants still give a fax number as the preferred channel for urgent documents, because it lands printed on the right desk without going through an overflowing shared mailbox.

This is a point rarely understood: the fax did not survive because it is technologically better, but because it physically lands in a paper file within organisations whose processing workflow is still paper-based.

Property management firms and works councils

The world of jointly owned buildings is highly uneven. The large property administrators have moved to extranets. But thousands of small management firms — two- or three-person practices, volunteer managers — work with tools installed fifteen years ago. The recurring requests that still go by fax:

• the request for a pre-completion statement or dated statement by the notary to the managing agent (articles 5 and 20 of the Act of 10 July 1965);
• notification of a transfer of ownership to the managing agent, which triggers the objection against the sale price;
• notices of meeting and proxy forms for the general meeting, for co-owners who cannot be reached any other way;
• exchanges with insurers about a water-damage claim, when the file is handled by an independent loss adjuster.

Banks: lien releases, offers, collections

Bank back-office departments are the other pocket of resistance. A request to release a mortgage charge, a payment instruction for the sale proceeds, confirmation that funds have been released, the lifting of a stop: these workflows are governed by internal procedures written long ago, and the fax number often appears there as an official fallback channel. The same applies to mortgage insurers and guarantee bodies.

What a fax is worth in a property file

Precision is needed here, because this is where commercial misunderstandings are born.

A fax does not bind you the way an authentic instrument does. A purchase offer sent by fax does not carry the force of a notarised preliminary agreement. It falls under the regime of free proof: the judge weighs the whole body of evidence — the document, the transmission report, the parties' subsequent behaviour. Between businesses, article L.110-3 of the French commercial code opens this freedom of proof widely.

The SRU cooling-off period is not triggered by fax. Article L.271-1 of the French construction and housing code requires, for notifying the preliminary agreement to a non-professional buyer, a registered letter with acknowledgement of receipt — paper or electronic within the meaning of article L.100 of the postal and electronic communications code. A fax does not start the ten-day clock. That mistake is an expensive one: it undermines the whole chain.

A handwritten signature scanned and then faxed remains a "simple" signature. It is admissible but open to challenge. For a significant commitment, an advanced or qualified electronic signature within the meaning of the eIDAS regulation offers an incomparable level of proof. The fax serves to transmit quickly, not to secure consent.

To go further on this ground, the article legal value of the fax in 2026 sets out what a judge actually looks at.

Working rule: fax to send within a deadline, registered post or electronic signature to commit. Never confuse the two functions.

Setting up a fax workflow without a fax machine in an agency

One number, several workstations

For an agency or a notarial practice, the heart of the matter is not sending the occasional fax: it is that everyone can do it, from anywhere, and that the records come back to the right file. A fax-to-email service meets all three needs:

• sending from a browser or an email client, including from a site visit;
• receipt in PDF format in a shared mailbox (conveyancing@, management@), with a timestamped acknowledgement;
• a searchable history that replaces the drawer full of thermal reports.

For the upstream part — the documents that have to be digitised — scan quality determines the final legibility. An A4 duplex flatbed scanner placed at reception handles surveys, title deeds and identity documents far better than a hand-held phone. If you work mostly on the move, a mobile scanning app with edge detection and multipage PDF export does most of the job, provided you switch to high-contrast black and white before sending.

Property documents that fax badly

A fax transmits black and white at 200 × 200 dots per inch in fine resolution. Some documents in the sector lose the essentials:

One detail that saves a great deal of time: retype the critical information on the cover sheet — file reference, property address, seller's name, direct callback number. The recipient then does not need the document to be perfect in order to attach the fax to the right file. Our fax cover sheet template covers the useful details.

Confidentiality: the sector's blind spot

A property transaction concentrates personal data that is sensitive in the everyday sense of the word: income, family situation, identity documents, bank details, sometimes health information for mortgage insurance. The GDPR applies in full, and the CNIL has published specific recommendations for real estate professionals on collecting supporting documents to prove solvency.

The fax poses two concrete risks:

1. Dialling the wrong number. One transposed digit sends a complete file to a stranger. Unlike email, there is no way to recall it. The safeguard is organisational: a locked-down address book, double-checking for any transmission containing identity documents, and never sending a sensitive document "just in case."
2. Unsupervised paper output. A fax received on a machine at reception sits out in the open. A fax received as a PDF in a named mailbox does not lie around. That is the strongest argument in favour of email reception in an agency open to the public.

For the printouts that remain necessary, a cross-cut shredder placed near the printing station avoids the worst leak of all: the waste-paper basket. And for paper files that have to travel between the agency and the notarial practice, a document bag with a secure closure beats a cardboard folder under your arm.

The technical timetable to keep in mind

The shutdown of the public switched telephone network is not a rumour. Orange stopped selling new analogue lines in 2018 and, since 2023, has been pushing ahead with the technical shutdown area by area, municipality by municipality. For an agency, a management firm or a notarial practice, that means three things:

• the fax machine plugged into the wall socket will eventually stop sending;
• replacing it with an ATA adapter behind a router sometimes works and often fails — fax modulation copes very badly with jitter and packet loss, even with the T.38 protocol;
• the number, on the other hand, can be kept by porting it to an online fax service.

That last point matters most in real estate: your fax number appears on your agency agreements, your brochures, your archived listings, the practice's stationery and the contact records of a hundred or so counterparties. Keeping it saves you from reworking that whole chain. The guide on keeping your fax number after the PSTN shutdown sets out the procedure.

If you nevertheless have to keep an analogue line for a while — for an entry phone, an alarm or a backup payment terminal — a UPS for your internet router will stop a power cut on a stormy afternoon from knocking out both the line and your incoming faxes.

Checklist: the fax in an agency or notarial practice in 2026

• Take stock of the counterparties that still require a fax: town halls in your patch, property managers, bank departments, insurers. The list is shorter than you fear, and it is stable.
• Check municipality by municipality whether paperless DIA filing is available; the fax is the fallback channel, not the default one.
• Never use the fax for the SRU notification of the preliminary agreement: paper or electronic registered post only.
• Systematically archive the document sent + the transmission report + the sender's identity, in the property file.
• Protect sensitive documents: double-check the number, receive PDFs in a named mailbox, no unattended paper output.
• Prepare for the PSTN shutdown: port the number to an online service before your area is switched off.
• Train your negotiators in ten minutes: a fax is prepared like a registered letter, with a complete cover sheet.

Frequently asked questions

Is a purchase offer sent by fax valid?

It is admissible as evidence, but it does not amount to a secure preliminary contract. Between businesses, proof is free and the judge weighs the whole body of evidence. For a firm commitment, an electronically signed document or a preliminary agreement drafted by the notary is preferable. The fax serves to meet a deadline, not to lock down an agreement.

Can you send a DIA by fax in 2026?

It depends on the municipality. Many have opened a digital planning portal where electronic filing is the normal route. Others still list only registered post and fax. Check the instructions published by the planning department concerned before sending, and keep proof of transmission whatever the channel.

How can an agency receive faxes without a fax machine?

A fax-to-email service assigns or ports a geographic number and delivers each incoming fax as a PDF to an email inbox. You can share it among several staff members and archive it like any other incoming mail. The receive a fax page explains how it works step by step.

Should transmission reports be kept?

Yes, and this is the most common mistake. The report alone proves nothing, the document alone proves nothing: it is their combination that forms a usable body of evidence. File them together, in the property file, as PDFs readable without proprietary software.

Does a fax cost more than registered post?

No, far less. A registered letter with acknowledgement of receipt costs more than five euros from the very first grams, and preparing it takes time. A few-page online fax to a French number costs a fraction of that. But it does not replace registered post where the law requires it — SRU notification, notice to quit, formal demand.

What should I do if sending to a town hall fails every time?

In nine cases out of ten, the recipient's fax machine is busy, out of paper or connected behind a faulty VoIP gateway. Try again in standard rather than fine resolution, reduce the number of pages, and call the department to confirm the number. If it keeps failing, switch to registered post and document the attempt: the send history is part of the file. The guide on international sending failures lists the most common causes.

Key takeaways

• The fax survives in real estate at the points of contact with public authorities and back offices: DIAs, notarial conveyancing, property managers, bank lien releases.
• Its value is that of free proof, never that of an authentic instrument; SRU notification remains reserved for registered post.
• An online service fully replaces the fax machine, keeps your existing number and eliminates unsupervised paper output.
• Documentary discipline — a complete cover sheet, the transmission report archived with the document — is worth more than any piece of equipment.
• Plan ahead for the PSTN shutdown in your area: number porting is arranged beforehand, not afterwards.

For a first transmission, the form is on the home page: send a fax. The list of supported countries specifies which destinations are covered if you work with non-resident sellers.