What Is a Mise en Demeure Under French Law?

A mise en demeure is a formal legal notice under French law through which a creditor demands that a debtor fulfill an obligation. It is governed primarily by Articles 1344 to 1344-2 of the Code civil. The mise en demeure serves as an official interpellation — it formally notifies the debtor of their default and triggers legal consequences including the accrual of interest (intérêts moratoires), transfer of risk, and the right to seek contract termination (résolution).

Under Article 1344, a debtor is considered in default (en demeure) either by a formal notice (mise en demeure), by an act producing equivalent effect (such as a summons — assignation en justice), or by operation of the contract itself if it stipulates that mere lapse of time constitutes default.

When Is a Mise en Demeure Required?

A mise en demeure is legally required before:

  • Claiming moratory interest: Under Article 1231-6, damages for delay in payment of a sum of money consist of interest at the legal rate (taux d\'intérêt légal), starting from the date of the mise en demeure.
  • Seeking contract termination: Under Article 1226, the creditor must give formal notice to perform within a reasonable time before seeking judicial termination (résolution judiciaire).
  • Enforcing penalty clauses: Under Article 1231-5, penalty clauses (clauses pénales) generally become due only after mise en demeure, unless the contract provides otherwise.
  • Transfer of risk: For obligations to deliver, risk passes to the debtor upon mise en demeure (Article 1196).

Formal Requirements Under Article 1344

A valid mise en demeure must:

  1. Be in writing: While an oral demand can theoretically suffice, written form is essential for evidentiary purposes.
  2. Clearly state the obligation: Specify the obligation breached and demand performance within a reasonable time.
  3. Express the creditor\'s intention: The letter must clearly convey that the creditor is placing the debtor in default.
  4. Be delivered by reliable means: Lettre recommandée avec accusé de réception (LRAR — registered mail with return receipt) is the standard method. Service by huissier de justice (bailiff) provides the strongest evidence.

Delivery Methods

The most common delivery methods, in order of evidentiary strength:

  • Huissier de justice: A bailiff delivers the mise en demeure in person and produces a procès-verbal with legal force. This is the gold standard and is irrefutable proof of delivery.
  • Lettre recommandée avec accusé de réception (LRAR): Registered mail with return receipt. The date of first presentation is considered the date of delivery.
  • Email with acknowledgment: Under Article 1344-2, electronic delivery with acknowledgment of receipt is now recognized, though less commonly used for initial formal notices.

Effects of a Mise en Demeure

Once validly served, a mise en demeure triggers:

  • Interest accrues: Moratory interest (intérêts moratoires) at the legal rate begins from the date of the mise en demeure.
  • Risk transfer: For obligations to deliver a thing, the risk of loss or damage shifts to the debtor.
  • Right to terminate: The creditor can seek judicial termination or, if the contract includes a clause résolutoire, automatic termination after the cure period expires.