Formal demand: when and how to send it effectively

Why a formal demand is decisive in debt recovery

A formal demand (mise en demeure) is central to amicable debt recovery and litigation. Legally, it is a formal request that the debtor perform their obligation within a specific period. It starts late-payment interest running and documents the breach. The Civil Code governs its scope and forms (Civil Code, art. 1344 to 1345-3).

• It records the delay and formally puts the debtor in default of performance.
• Where applicable, it starts default interest running at the statutory rate (see the Civil Code on Legifrance — French legislation portal).
• It proves your prior attempt at an amicable resolution, useful before proceedings (particulars required by the Code of Civil Procedure, see Justice.fr — French justice portal).

Key point: a formal demand does not interrupt the limitation period. Only certain acts (court proceedings, acknowledgment of debt, compulsory enforcement acts) interrupt it. Keep an eye on your limitation deadline.

When should you send a formal demand?

The right time

• As soon as the obligation falls due (invoice due date, failed delivery, defective service), and after 1 to 2 ordinary reminders have had no effect. The public portal explains the reminder/formal demand stage in amicable recovery (Entreprendre.Service-Public.fr — business guidance portal).
• Before issuing proceedings: initiating documents must describe the amicable steps taken (information on Justice.fr — French justice portal).
• To trigger interest and clauses: in the absence of specific commercial provisions, a formal demand triggers statutory interest in civil matters (check current legislation on Legifrance — French legislation portal). In B2B, penalties and a minimum recovery-cost allowance are provided for by EU law (Directive 2011/7/UE, EUR-Lex — EU law portal).

How much time to allow

Common practice: 8 to 15 days for a straightforward unpaid debt; 15 to 30 days for technical disputes (non-conformity, warranty). Adjust to the nature of the obligation and urgency. Specify a clear deadline (day/month/year).

How to send it to secure evidence

• Registered letter with acknowledgment of receipt (LRAR): the standard form of proof (sending and acknowledgment dates). This is the most commonly used format in amicable recovery (Entreprendre.Service-Public.fr — business guidance portal).
• Service by a judicial officer (commissaire de justice, formerly huissier): service by a public officer provides a legally certain date and receipt that is difficult to dispute; useful for uncooperative debtors or high stakes (practical information on Justice.fr — French justice portal).
• Email or hand delivery: possible if the demand is sufficient (clear, traceable content). But its evidential strength is lower than registered post or formal service. Assessment remains within the discretion of the trial judges (Legifrance — French legislation portal).

Always retain a copy of the letter, acknowledgment of receipt, postal tracking, certificate of service and all attachments.

Essential particulars of a formal demand

• Explicit subject: “Formal demand”.
• Full identity of the parties (name, SIREN, registered office/address, contact details).
• Summary of the facts and contract (date, reference, obligations, deadlines).
• Precise demand: sum due (principal, penalties/allowance if applicable), or obligation to perform/deliver.
• Firm period and deadline (e.g. “within 15 days of receipt and no later than 15/03/2026”).
• Payment details and arrangements (bank transfer, bank details, reference).
• Consequences of non-performance: statutory interest, possible activation of a penalty/termination clause, court proceedings, order for payment (Justice.fr — French justice portal).
• Attachments: contract, terms of sale, invoices, delivery notes, correspondence.
• Signature and signatory's capacity.

For support and templates suited to your sector, you can Explore AI and law resources.

Operational checklist (ready to use)

1. Check that payment is due and verify the amount (contract, due dates, penalties, evidence).
2. Choose the channel: registered post (default) or judicial officer (high stakes/risk of dispute).
3. Draft with the essential particulars, calculate amounts precisely and set a deadline.
4. Attach key documents and bank details; check the legal address (Kbis/legal notices).
5. Send; archive acknowledgment/tracking; schedule the follow-up deadline.
6. On Day+1 after the deadline, send a final reminder and prepare proceedings (payment order, summons).

Common mistakes to avoid

• A vague period (“as soon as possible”) instead of a specific deadline.
• An unquantified demand or one without contractual/legal basis.
• No “Formal demand” subject or warning of court action.
• Incorrect debtor address (returned as undeliverable): check recent legal information.
• An inappropriately aggressive or threatening tone: remain factual and professional (a judge will read the letter).

After the formal demand: what next?

• Payment/instalment agreement: document it in writing and maintain a schedule.
• Order for payment (injonction de payer): a fast written procedure for claims that are certain, fixed in amount and due; forms and detailed steps on Justice.fr — French justice portal.
• Proceedings on the merits or interim proceedings: depending on urgency and purpose (judgment, performance, termination).
• Compulsory enforcement after obtaining an enforceable instrument: measures by a judicial officer.

Need a clear plan and controlled timelines? Try our Discuss your firm's AI transformation.

Data protection and compliance

Limit data to what is necessary (identity, contact details, references) and secure supporting evidence (acknowledgment, documents). Follow CNIL good practice for data retention and security (CNIL — French data protection authority).

Further reading

See our related guides: Order for payment: a fast debt recovery procedure, Services contract and SaaS terms of sale: essential clauses.

Quick FAQ

Is a formal demand mandatory before going to court?

Not always, but it is strongly recommended. Certain procedures require an account of the amicable steps taken, and a formal demand provides simple and effective evidence (Justice.fr — French justice portal).

How much time should the debtor have?

In practice, 8 to 15 days for an unpaid invoice; 15 to 30 days for non-monetary obligations. Set a precise deadline.

Must you use a judicial officer?

No. Registered post is usually sufficient. Service by a judicial officer nevertheless strengthens evidence and pressure where substantial interests are at stake.

Does a formal demand interrupt the limitation period?

No. It puts the debtor in default and may start interest running, but does not interrupt limitation (check the applicable provisions on Legifrance — French legislation portal).

To secure your steps and save time, Explore AI and law resources and start your Discuss your firm's AI transformation.