Fax, leases and rentals: notifying tenants and landlords

Short answer: in a landlord-tenant relationship, a fax never replaces a form imposed by law. Notice to quit given by the tenant, like notice given by the landlord, is governed by Article 15 of the Act of 6 July 1989: registered letter with acknowledgement of receipt, hand delivery against signature, or a judicial commissioner's writ — full stop. On the other hand, the fax remains very useful around the lease: sending an application file to an agency that closes within the hour, forwarding a repair quote to a property manager, alerting a landlord to an ongoing water leak, replying to a disputed service-charge reconciliation before the deadline expires, or getting a signed inventory of fixtures to an agent. Three rules: identify first the form required by the applicable text, never mistake the fax send date for a notification date, and archive the transmission report together with the exact copy of the pages sent.

The preliminary sort: required form, free form, recommended form

Renting is one of the rare areas of civil law where the legislator took the trouble to write down, text by text, how each piece of information must travel. That is a stroke of luck: all you have to do is read before you send.

Required form. The text says "by registered letter with acknowledgement of receipt, by judicial commissioner's writ or by hand delivery against receipt or signature". Any other form risks nullity or unenforceability. Notice given by the tenant and notice given by the landlord (Article 15, I of Act No. 89-462 of 6 July 1989) fall into this category, as does the offer to sell to the tenant when notice is given with a view to selling.

Free form. The text says nothing, or simply says "informs". This covers most day-to-day management exchanges: reporting a broken boiler, requesting authorisation for non-structural works, forwarding a home insurance certificate (compulsory every year but with no prescribed form), sending a meter reading. Here the fax is perfectly acceptable, and often faster than a registered letter.

Recommended form. The text does not require it, but case law rewards the party holding dated proof. A formal notice to carry out repairs, a challenge to a deduction from the security deposit, a reply to a service-charge reconciliation: nothing requires a registered letter, but before the protection litigation judge, whoever produces a timestamp saves time.

Survival rule: if the word "registered" appears in the statute or in your lease, no fax, no email and no text message will replace it. If the word does not appear, the fax becomes a serious option.

What a fax really proves in a rental file

A fax produces a transmission report: date, time, number dialled, number of pages, outcome of the negotiation between the two terminals. It is a technical document, not an authenticated instrument. Before a court, it counts as prima facie written evidence, reinforced by the parties' conduct.

What it robustly establishes:

• The moment of sending. A date and time, generated by third-party equipment, hard to backdate.
• The technical recipient. A number dialled, which can be matched against the number shown on the lease, the rent receipts or the agency's letterhead paper.
• The volume. The number of pages transmitted, which must match exactly the copy you archive.

What it does not establish:

• That it was read. Nobody signed anything at the receiving end. A postal acknowledgement of receipt, by contrast, bears a signature.
• The content, in itself. The report does not reproduce the pages. Hence the absolute obligation to archive the copy sent alongside it, in the same file, under the same date.
• The capacity of the signatory. If the fax goes out from your neighbour's number or from a shop, nothing links you to the transmission. A named online fax, attached to an identified account, is far more solid.

For bulky files — a ten-page move-in inventory with photo annexes, for instance — scan quality determines how legible the received copy will be. A document scanner with an automatic feeder, capable of 300 dpi greyscale output, avoids illegible grey pages at the other end and photo annexes that turn black. We set out the settings to respect in our guide on digitising paper documents.

The six rental situations where a fax makes the difference

1. The application file that has to arrive before closing time

An agency announces that the most complete file received before 6 p.m. will be presented to the landlord. You have the documents, no scanner within reach, but a shop or an online fax. The timestamped fax gives you enforceable priority should a dispute over preference arise. Careful: an application file contains sensitive documents. Decree No. 2015-1437 of 5 November 2015 sets out an exhaustive list of the documents that may be required — payslips, tax assessment, proof of address. Anything not on that list (bank statements, certificate of good health, detailed banking data) has no place in a fax, or anywhere else.

2. The ongoing incident

Leak, water ingress, boiler out of order in the middle of winter: Article 6 of the 1989 Act requires the landlord to provide decent accommodation and to carry out the necessary repairs. The tenant has every interest in dating the report. A fax sent that same evening, with two legible photos and a factual description, creates a record the landlord will not be able to contest six months later when the question of compensation arises. Back it up with a registered letter if the situation drags on.

3. Challenging a deduction from the security deposit

The landlord has one month after the keys are returned if the move-out inventory matches the move-in one, two months otherwise (Article 22 of the 1989 Act), to return the deposit. Beyond that deadline, the sum owed is increased by 10% of the monthly rent for each month of delay commenced. A tenant challenging a deduction is well advised to send the challenge quickly, precisely dated, with a line-by-line breakdown of the items disputed. The fax does the job, and leaves you the night to prepare a confirming registered letter.

4. The disputed service-charge reconciliation

The landlord must keep the supporting documents for service charges available to the tenant for six months following dispatch of the statement. In a co-ownership building, that means circulating extracts from the managing agent's accounts. The fax is an acceptable channel for a statement of a few pages, but its limits show quickly: illegible allocation tables, truncated columns. For this type of transmission, favour landscape format and a font of at least 10 points.

5. The repair quote to be approved the same day

A tradesperson has a slot on Monday, the property manager is travelling, nobody is checking email. The fax to the agency's number, printed on the letterhead, is often the only channel that still rings in an office. An approval form, with amount, deadline and signature, fits on one page.

6. Management mandates and dealings with an agent

When the landlord works through an agency holding a professional licence under the Hoguet Act of 2 January 1970, notifications must come from the agency or be addressed to it if the mandate so provides. A fax sent to the wrong party — the owner directly when the mandate is exclusive — may be held unenforceable. Check the capacity of the recipient before dialling the number.

Notice to quit: the red zone

This is where mistakes cost the most, and where a fax is invariably insufficient.

The notice period runs from receipt of the letter, from service, or from hand delivery — never from dispatch. That is the classic mistake: a tenant posts notice on the 30th of the month thinking they will vacate three months later, the letter is presented on the 3rd, and the notice period shifts accordingly. A fax sent on the 30th changes nothing: it has no effect on the legal starting point.

On the distinction between the date of dispatch and the date of effect, our article devoted to the evidentiary value of a fax before a judge sets out the applicable case law.

Confidentiality: a lease is a personal-data document

A lease contains the full identity of the parties, their address, often their date of birth, sometimes a social security number slipped into a certificate. An application file contains income details. The CNIL has issued several reminders to real-estate professionals on minimising the data collected and on how long the files of unsuccessful applicants may be kept — three months maximum in the absence of consent.

In practical terms, before sending:

• Compulsory cover sheet. Recipient's name, department, number of pages, the mention "confidential document — if you are not the intended recipient, please destroy". It offers no legal protection, but it stops a fax that landed on the wrong floor from being read out of curiosity.
• Selective redaction. Mask anything that cannot lawfully be required: full bank details, tax number, health data. A roll of opaque correction tape or a black pigment-ink marker does the job on a paper original — an ordinary highlighter leaves the text readable through the ink.
• Two-digit check. Read the last two digits of the number out loud before confirming. Wrong numbers are common in real estate because agencies move premises and keep their old letterhead. If the mistake happens anyway, our guide on a fax sent to the wrong number sets out what to do within 72 hours.
• Destroying drafts. Test pages, botched redacted originals and annotated inventories must end up in a cross-cut shredder, not in the office bin.

Archiving: the reflex that saves you eighteen months later

A rental dispute rarely breaks out within the week. It surfaces at move-out, when the deposit fails to arrive, or two years later, when the landlord claims for tenant repairs. At that point, what you have archived makes all the difference.

The method that holds up:

1. One folder per property, never per year.
2. One sub-folder per transmission, named YYYY-MM-DD-subject.
3. Three files per transmission: the exact PDF of the pages sent, the transmission report, and a one-line note recalling the context ("reply to the 2025 service-charge reconciliation, six-month period running from 12/03").
4. An offline copy. An external hard drive or an encrypted USB stick stores the complete file at the end of the lease; online fax accounts sometimes purge their history after twelve or twenty-four months.
5. Paper originals filed in a flap archive box, together with the rent receipts the landlord must issue free of charge on request (Article 21 of the 1989 Act).

Actions for payment of rent and charges are time-barred after three years (Article 7-1 of the 1989 Act). That is your minimum archiving horizon; five years for actions relating to the security deposit and to damages, as a precaution.

Frequently asked questions

Is notice sent by fax void?

It is not "void" in the technical sense: it is ineffective. It does not start the notice period running and does not release you from the obligations of the lease. If the landlord replies without reservation and accepts the return of the keys on the proposed date, case law sometimes accepts that the parties' common intention made up for the defective form — but that is a gamble, not a strategy. Send a registered letter.

Can I fax my signed move-out inventory?

Yes, as a working copy, so the agency can start the deposit refund without waiting for the post. The original signed by both parties must be drawn up in as many copies as there are parties (Article 3-2 of the 1989 Act) and each keeps their own. The fax speeds things up; it does not replace them.

My agency no longer has a fax machine — what do I do?

This is increasingly common since analogue lines stopped being sold. Ask in writing for a valid fax number or an address where documents can be lodged. Failing that, hand delivery against signature always remains possible and free of charge: it has exactly the same value as a registered letter for acts subject to a prescribed form.

Is a fax acceptable for a social housing application?

Social landlords now require applications to be lodged through the national online registration system. A fax may be used to send an additional document to a local branch that still publishes a number, but never to lodge the application itself.

Should rent receipts received by fax be kept?

Yes, and for a long time. A receipt received by fax is a copy; it remains usable as proof of payment but becomes less legible over time if printed on thermal paper. Scan it, or ask for the receipt in electronic format, which the landlord may send with your express consent.

In summary

• A fax never replaces a prescribed form: notice to quit, payment orders and offers to sell require a registered letter, a judicial commissioner's writ or delivery against signature.
• The notice period runs from receipt, never from dispatch. A dated fax shifts no legal deadline.
• For everything else — reports, quotes, challenges, additional documents — the fax is fast, dated and admissible as prima facie written evidence.
• Archive together the transmission report and the exact copy of the pages; without both, you have nothing.
• Minimise the data: only the documents on the list in the Decree of 5 November 2015 may be required of a prospective tenant.
• Keep everything for three years minimum, five as a precaution on security deposit questions.

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