What the law does not provide
Neither the Climate and Resilience law, nor articles L. 126-35-2 and following of the CCH, nor decree n° 2022-1674 attach any criminal or administrative sanction to the absence of a CIL. No fine, no automatic voiding of the sale, no dedicated inspections. A seller without a logbook will not receive a penalty notice.
So beware of alarmist wording ("the CIL under penalty of sanctions!"): it rests on no legal text. But the opposite, "no sanction, so no stakes", is just as wrong. Here is why.
The three real risks
1. Friction at the notaire's office
On any transfer of a home subject to the CIL, the logbook must be handed over at the latest when the deed is signed, and the buyer acknowledges receipt in the deed. Concretely: the notaire asks the question, and the missing logbook becomes an issue to handle at the worst moment, when every party wants to sign. A delay, an adjusted clause, a commitment to send it later: nothing dramatic, but avoidable friction, entirely at the unprepared seller's expense. The timeline in detail: CIL and selling.
2. The seller's civil liability
Ordinary French law applies: the pre-contractual duty to inform, the hidden defects warranty, fraud in case of deliberate concealment. The CIL does not create these obligations, it materialises them. A seller who knew about an insulation defect or end-of-life equipment and documented and disclosed nothing faces classic litigation; conversely, a complete, handed-over logbook is simple proof that the information was given on the elements it contains. The logbook protects more than it threatens.
3. The invisible cost: the documentation discount
The most certain risk is not legal. Facing an empty file, a careful buyer does what everyone does: they price in the doubt. A boiler with no servicing history? They budget its replacement. Insulation "redone" with no invoice? They ignore it in the price. Every missing document is paid for in negotiation, far more surely than any hypothetical fine.
| Risk | Likelihood | Impact |
|---|---|---|
| Fine / administrative sanction | None (no legal text) | None |
| Friction at the deed signing | Near certain if a logbook is due and missing | Delay, clauses, last-straight stress |
| Civil litigation (failure to inform, fraud) | Low but real where a defect was known | Potentially heavy |
| Downward price negotiation | High | Counted in thousands of euros |
A dated intervention log, attached documents, a timestamped PDF export for the notaire: with Relai Confiance, proving what was done on your property becomes trivial.