Rental Dispute: Building an Evidence File (2026)
An unreturned security deposit, disputed damage, water leaks, unfinished repairs, unpaid rent: a dispute between tenant and landlord is rarely won on someone's word — it is won on evidence. Yet when conflict erupts, the material is usually scattered: a few photos on a phone, a move-in inventory buried in a drawer, emails lost in the inbox. This guide explains, step by step, how to build a clear, solid evidence file, which documents to gather, and where to use it.
Why an evidence file makes the difference
Under French civil law the rule is simple: the burden of proof lies on whoever makes the claim. Article 1353 of the Civil Code states that a person who demands the performance of an obligation must prove it, and conversely that a person claiming to be released must prove the payment or fact that extinguished the obligation. In practice, if you ask for your deposit back or for compensation, it is up to you to bring the evidence — not to the other party to prove otherwise.
A well-built file does two things: it gathers that material in one place, and it dates it credibly. An undated, context-free photo carries little weight; the same photo, timestamped and placed in a coherent timeline, becomes something a judge, a mediator or an insurer can assess.
The documents that matter in a tenant-landlord dispute
Depending on the dispute, here is what to gather first:
- The lease and its annexes — signed rental contract, information notice, diagnostics. The foundation of each party's obligations.
- Move-in and move-out inventories — the key piece for damage. It is the comparison of the two that allows damage to be attributed (or not) to the tenant. Without a jointly signed move-out inventory, damage is very hard to prove.
- Dated photos and videos — of the property's condition, a water leak, mould, a faulty appliance. Ideally taken as things happen, not reconstructed afterwards.
- Letters, especially registered mail — formal notice, reporting a defect, a request for return. The delivery receipt proves date and receipt.
- Written exchanges — emails and text messages with the other party. They establish who knew what, and when.
- Financial records — rent receipts, transfers, repair quotes and invoices. A deduction from the deposit must be justified by quotes or invoices.
- A bailiff's report — for high-stakes cases. Paid, but with strong probative value.
How to build your file, step by step
1. Gather everything in one place
First reflex: stop scattering. Bring all the material — files, photos, scanned letters, email captures — into a single space rather than ten folders and inboxes. A file you can't find at the hearing is useless.
2. Date and secure each item
The date is what gives an item weight. For photos, avoid re-forwarded screenshots (which lose their metadata): prefer shots timestamped at capture. Keep the delivery receipts of registered letters, the dated headers of emails, the timestamps of documents received.
3. Establish a clear timeline
A good file tells a story in order: first observation, report to the landlord, no reply, worsening, formal notice. A chronological timeline lets the reader — judge, mediator, insurer — grasp the situation in seconds, without reconstructing the sequence themselves.
4. Keep the originals
Never work only from editable copies. Keep the original files (unedited photos, received PDFs, intact emails): their integrity is what makes them credible. A visibly edited item undermines the whole file.
5. Prepare a shareable version
When the time comes to hand the file to a lawyer, a mediator or your legal-protection insurer, you should be able to do it cleanly, in one go, without sending thirty separate attachments. A file viewable through a single read-only link saves considerable time — and looks serious.
Date and centralize your proof with Truth-Check
That is exactly what Truth-Check evidence folders are for. You group in one place your certified photos and videos, imported documents (lease, inventory, invoices), emails and notes. Each item sits on a chronological timeline and honestly shows its proof level:
- Certified — a photo or video taken in the app, sealed at capture with its metadata and a SHA-256 cryptographic fingerprint: any later change breaks the seal.
- Timestamped — a document or email received into the folder, dated on receipt by Truth-Check.
- Declared — a note or item you add yourself.
You can then hand the whole folder to your lawyer via a read-only share link, revocable at any time. Note: a folder organizes and dates your proof; it does not, on its own, grant it legal value — the probative force of an item always rests with the judge's assessment. But a clear, dated, verifiable file puts the odds on your side. For a visual property inventory, see our real estate & inventory use case.
Where to use your file
Before court, a rental dispute usually goes through amicable steps:
- A registered letter of formal notice — the first formal step, often enough when the file is solid.
- The departmental conciliation commission — free, with equal numbers of landlord and tenant representatives. It handles many rental disputes (deposit, inventory, charges, repairs) and issues an opinion. A useful step, sometimes a prerequisite.
- A justice mediator — a free third party who helps reach an agreement.
- The judicial court — as a last resort. This is where the quality of the evidence file matters most.
Take the classic security deposit case: the law requires the landlord to return it within one month when the move-out inventory matches the move-in one, and within two months at most where there are differences. Past that deadline, the deposit is increased by a sum equal to 10% of the monthly rent for each month of delay started (Law of 6 July 1989, article 22). But you still need to be able to date the key handover and the inventory precisely — once again, everything rests on the evidence.
FAQ
Does a photo taken with my phone count as evidence?
Yes, a photo can be an item of evidence, but its value depends on its date, context and integrity, as assessed by the judge. A photo timestamped at capture and unedited is far more credible than a re-forwarded screenshot whose origin cannot be dated.
What if no inventory was ever done?
That is unfavourable to the landlord: without a jointly signed move-out inventory, it is very hard to attribute damage to the tenant. Gather every other dated element (photos, letters, witness statements) to reconstruct the property's condition.
How do I prove I reported a problem to the landlord?
Through dated writing: a registered letter with acknowledgement of receipt is the strongest proof, but a kept email or text also counts. What matters is being able to establish the date of the report and whether there was a reply.
Does a Truth-Check folder replace a lawyer or a bailiff?
No. Truth-Check helps you build, date and share your proof in an organized way. It does not provide legal advice and replaces neither a lawyer nor a bailiff's report. For high-stakes disputes, seek professional support.
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