Formal notice to pay an invoice between businesses

A professional customer who leaves an invoice unpaid ties up a company's cash flow, sometimes for months. Before commencing court proceedings that are often long and costly, one simple step is almost always called for: the formal notice to pay (mise en demeure de payer). Badly drafted, it has no legal effect. Properly constructed, it triggers default interest, fixes a date that can be relied on against the debtor and forms the first document in a solid litigation file. This guide sets out the mandatory contents, provides an annotated template and explains precisely the effects of this letter between businesses.

What a formal notice to pay between businesses is

A formal notice is the act by which a creditor formally calls on its debtor to perform its obligation, here the payment of a sum of money. It marks the move from a simple commercial reminder to a dated legal act that can be proved.

Article 1344 of the French Civil Code sets out the principle:

The debtor is put on notice to pay either by a demand or by a document containing a sufficient call to perform or, if the contract so provides, by the mere fact that the obligation falls due.

Two practical lessons follow. First, a simple telephone reminder or a vague email is not enough: a "sufficient call to perform" is needed, that is, a writing that clearly demands payment of a specified sum within a specified period. Second, certain commercial contracts provide that the debtor is in default by the mere fact that the debt falls due, without any formality. This clause, known as a waiver of formal notice, exists but remains the exception; in its absence, a formal written notice is indispensable.

The distinction between a reminder and a formal notice is fundamental. A company may send a customer three "amicable" reminders without any of them producing legal effect. Only the formal notice, because it constitutes a sufficient call to perform within the meaning of Article 1344, causes interest to run and opens the way to litigation.

Formal notice to pay and unpaid invoice: terms not to be confused

Several terms are in circulation: reminder letter, formal notice, demand to pay (sommation de payer), order to pay (commandement de payer). The demand and the order are acts served by a commissaire de justice (bailiff, formerly known as an huissier), and are therefore more formal and more costly. The standard formal notice, for its part, most often takes the form of a registered letter with acknowledgement of receipt drafted by the company or its lawyer. It is the latter that this guide deals with first, because it is the first reflex when faced with an unpaid invoice between businesses.

When to send a formal notice for an unpaid invoice

The right moment is neither too early nor too late. Too early, and the step is premature if the invoice is not yet overdue. Too late, and the claim may come close to being time-barred.

Between businesses, an invoice falls due on the agreed payment date. Failing any particular agreement, Article L441-10 of the French Commercial Code sets a payment period that may not exceed sixty days from the date of issue of the invoice, or forty-five days from the end of the month if that arrangement is stipulated in the contract. Once that period has passed, the invoice is unpaid and a formal notice becomes justified.

Limitation imposes a second time limit. Between traders, or between a trader and a non-trader, obligations arising in the course of their trade are time-barred after five years (Article L110-4 of the French Commercial Code). A company that lets a claim lie dormant therefore risks losing all recourse. The formal notice does not of itself suspend limitation, but it is a step likely to prompt the debtor to react before the period expires.

In practice, a prudent company sends its formal notice after one or two amicable reminders have gone unanswered, generally in the weeks following the due date. This gradation shows the creditor's good faith, a factor that is looked on favourably if the dispute continues before the commercial court (tribunal de commerce).

The mandatory contents of the formal notice

No text imposes a single set form, but case law and practice require the letter to constitute a "sufficient call to perform". Certain contents are therefore, in fact, mandatory for the document to produce its effects. An incomplete formal notice may be disregarded by a judge who will refuse to start interest running on the date sought.

The mandatory contents of the formal notice are as follows:

• the full identification of the creditor and the debtor (corporate name, legal form, SIREN number, registered office address), to remove any ambiguity as to the parties
• the precise reference of the claim: invoice number and date, subject of the service or delivery, due date that has passed
• the exact amount claimed, as principal, possibly increased by late-payment penalties already due
• a clear demand to pay, worded unambiguously (use of the words "formal notice" is strongly recommended)
• a precise time for payment, for example eight or fifteen days from receipt
• a statement of what will follow in the event of non-payment: default interest, fixed recovery indemnity, court proceedings
• the date and signature of the creditor or its counsel

The absence of a stated time limit or of a specified amount is the most frequent weakness. A letter that merely asks for "payment of your invoices as soon as possible" is not a sufficient call to perform. The debtor must know how much is owed, on what basis, and until when it may pay before the consequences take effect.

Contents specific to relations between businesses

Between businesses, two specific elements strengthen the formal notice. First, late-payment penalties: Article L441-10 of the French Commercial Code provides that they are payable as of right from the day after the due date, at the rate agreed in the contract or, failing that, at the European Central Bank's interest rate plus ten percentage points. Second, the fixed indemnity for recovery costs, set at forty euros by Article D441-5 of the same code, automatically due for any invoice paid late between businesses. Mentioning these two items in the formal notice has both an educational and a deterrent value. The calculation of these penalties and how they interact with contractual clauses are detailed in our article on late-payment penalties and the fixed recovery indemnity.

Annotated template of a formal notice to pay

The following template can be adapted to most situations between businesses. Each block is followed by a comment explaining its legal function.

Heading and contact details

[Creditor's corporate name, legal form, share capital, SIREN, address] For the attention of [debtor's name, SIREN, registered office address] Registered letter with acknowledgement of receipt No. [...] [City], [date] Subject: formal notice to pay invoice No. [...]

The subject line must contain the words "formal notice". This explicit characterisation avoids any later dispute as to the nature of the letter. Sending by registered post with acknowledgement of receipt gives a certain date of receipt, which is essential for the starting point of the time limit and of interest.

Reminder of the claim

We delivered to you [or provided the service of] [subject] under our invoice No. [...] of [date], for an amount of [...] euros including all taxes, payable no later than [due date]. To date, despite our reminders of [dates], this invoice remains unpaid.

This paragraph establishes the existence, the amount and the due date of the claim. The mention of earlier reminders shows the creditor's patience and good faith, a useful point before the judge.

The demand to pay

Accordingly, we hereby give you formal notice to pay us the sum of [...] euros within [eight / fifteen] days of receipt of this letter.

This is the core of the document: a specified sum and a precise time limit. Without these two elements, the letter is not a sufficient call to perform within the meaning of Article 1344 of the French Civil Code.

Statement of the consequences

Failing payment within that period, this sum will bear default interest, increased by the fixed recovery indemnity of forty euros provided for in Article D441-5 of the French Commercial Code, and we reserve the right to bring the matter before the competent court without further notice.

This clause informs the debtor of what will follow and shows the creditor's willingness to litigate. It makes the threat credible and often prompts payment within the time allowed.

Closing

We remain at your disposal to agree, if need be, a payment schedule. [Signature, capacity of the signatory]

Offering a payment schedule does not weaken the formal notice; it opens an amicable way out while preserving the legal value of the document. A template never removes the need to adapt it to the specific case: the nature of the claim, the existence of a written contract or general terms of sale and the history of the commercial relationship may justify adjustments.

The legal effects of the formal notice

This is where the formal notice takes on its full significance. It is not a mere formality: it triggers specific effects, the most important of which concerns interest.

The starting point of default interest

Article 1344-1 of the French Civil Code states a central rule:

A formal notice to pay an obligation to pay a sum of money causes default interest to run, at the statutory rate, without the creditor having to show any loss.

In other words, from the formal notice, the sum due bears interest, and the creditor does not have to show that it has suffered damage: the delay in payment is enough. The starting point is the date on which the debtor receives the letter, hence the importance of the acknowledgement of receipt. This rule applies even if no clause of the contract provides for interest.

Between businesses, this mechanism is combined with the late-payment penalties of Article L441-10 of the French Commercial Code, which run as of right from the day after the due date, without prior formal notice. The formal notice remains useful because it secures the proof of the delay, fixes a date that can be relied on against the debtor and, absent a contractual clause on interest, activates interest at the statutory rate under Article 1344-1.

The fixed recovery indemnity

Any invoice paid late between businesses gives rise to the fixed indemnity for recovery costs of forty euros set by Article D441-5 of the French Commercial Code. If the recovery costs actually incurred exceed that amount, the creditor may claim additional compensation on production of supporting documents. The formal notice is the natural moment to mention this indemnity.

The transfer of risk and the building of proof

Beyond interest, the formal notice produces other effects. It constitutes written and dated evidence that the claim is certain, liquid and due, three conditions required to obtain subsequently an order for payment (injonction de payer). It also shows that the creditor acted in good faith by giving the debtor a last chance to put matters right. In litigation, the judge views favourably a creditor who attempted an amicable resolution before bringing the matter before the court.

A worked example for illustration

Imagine a consulting company that invoices a service to a small or medium-sized business customer, payable at sixty days. The due date has passed and two reminders have gone unanswered. The company sends a formal notice received by the debtor on a date evidenced by the acknowledgement of receipt. From that date, the claim bears default interest at the statutory rate under Article 1344-1, the fixed indemnity of forty euros is due, and contractual late-payment penalties have been running since the due date. If payment is still not made, the formal notice becomes the key document in the application for an order for payment.

How to send the formal notice

The choice of means of sending determines the evidential value of the document. Three options exist, from the most flexible to the most formal.

The registered letter with acknowledgement of receipt is the most common and the most suitable channel. It gives a certain date of receipt, at moderate cost, and is sufficient to constitute a sufficient call to perform. It is the recommended option in the great majority of cases between businesses.

Email or an electronic registered letter may be suitable where the contract or the general terms of sale provide for this means of exchange. The electronic registered letter, governed by the European regulation on electronic identification, has the same legal value as a paper registered letter, provided a qualified provider is used.

The demand or order to pay served by a commissaire de justice is the most formal document. It is particularly useful where the debtor denies having received the reminders, or where the claim is substantial and litigation likely. The cost of these acts is governed by a regulated tariff: Article A444-14 of the French Commercial Code sets, for example, the fee for the order to pay preceding a seizure and sale (saisie-vente) at a little over twenty euros, and that for service of the certificate of non-payment constituting an order to pay at a higher amount. These tariffs are revised periodically.

The commissaire de justice brings reinforced evidential force: the document is served on the person or at their home, with a record (procès-verbal) that makes it almost impossible to dispute receipt. For a modest claim, however, the registered letter remains proportionate. On the three levels of formality and what the intervention of the ministerial officer really adds, see our analysis of formal notice by a commissaire de justice.

After the formal notice: moving to litigation

If the time limit expires without payment or reply, several routes open up. The choice depends on the amount, on whether the claim is disputed and on urgency.

The order for payment procedure is the one best suited to undisputed claims. It takes place without a prior hearing: the creditor files an application with the competent commercial court where the debtor is a trader, enclosing the invoice, the contract or the general terms of sale, the reminders and the formal notice. If the judge considers the claim well founded, he or she issues an order for payment, which the creditor has served on the debtor. The formal notice is here among the decisive documents.

Summary proceedings for an interim payment (référé provision) make it possible to obtain quickly payment of a claim that is not seriously disputable. A hearing is required, but it leads to an enforceable decision within a short time.

A summons on the merits (assignation au fond) remains the ordinary route where the claim is disputed in principle or in amount, or where the dispute raises more complex questions, for example a challenge to the quality of the service.

In every case, the prior formal notice shows that the creditor has exhausted the amicable phase. Certain procedures and many contractual clauses moreover require an attempt at amicable resolution before any application to the court. The formal notice fulfils precisely this function as a preliminary step to litigation. The full sequence from amicable reminder to formal notice and the choice of judicial route is covered in our step-by-step guide to recovering an unpaid debt.

Conclusion

The formal notice to pay is not an optional formality: it is the pivotal step between the commercial reminder and the lawsuit. Properly drafted, it causes default interest to run under Article 1344-1 of the French Civil Code, activates the fixed recovery indemnity, provides evidence of a certain, liquid and due claim, and satisfies the amicable preliminary step expected by the courts. Badly drafted, with a vague amount or without a stated time limit, it produces none of these effects and wastes precious time.

The position is simple: between businesses, no unpaid invoice should go to litigation without having been preceded by a written, dated, quantified formal notice sent by a means that provides proof. Before commencing court proceedings, check three points on your letter: is the exact amount specified, is a precise time limit set, and do you have proof of receipt? If any of these three elements is missing, have the document reviewed by a lawyer before sending it: it is the best way to secure recovery and, often, to obtain payment without ever going to court.

Frequently asked questions

Is a formal notice by simple email valid between businesses? An email may constitute a sufficient call to perform within the meaning of Article 1344 of the French Civil Code if it clearly demands payment of a specified sum within a precise time limit. Its weakness lies in proof of receipt. Unless the contract or the general terms of sale provide for exchange by email, a registered letter with acknowledgement of receipt or an electronic registered letter offers markedly greater legal certainty.

From when does interest run after a formal notice? Under Article 1344-1 of the French Civil Code, default interest at the statutory rate runs from the formal notice, without the creditor having to show any loss. The starting point is the date on which the debtor receives the letter, hence the importance of the acknowledgement of receipt. Between businesses, the late-payment penalties of Article L441-10 of the French Commercial Code also run from the day after the invoice's due date.

What time should be allowed to the debtor in the formal notice? No text imposes a fixed period, but a period of eight to fifteen days from receipt is customary and regarded as reasonable between businesses. A period that is too short could be regarded as unfair, while one that is too long needlessly delays recovery. The time limit must be expressed in precise figures for the document to constitute a sufficient call to perform.

Is a formal notice compulsory before applying to the court? It is not systematically required by law, but it is strongly recommended and often required in practice. Many contractual clauses require an attempt at prior amicable resolution, and the judge looks favourably on a creditor who has given the debtor a last chance. For an order for payment, the formal notice is among the documents that show the claim is certain and due.

Can recovery costs be claimed in the formal notice? Yes. Between businesses, any invoice paid late gives rise to the fixed recovery indemnity of forty euros set by Article D441-5 of the French Commercial Code, due as of right. If the costs actually incurred exceed that amount, the creditor may claim additional compensation on production of supporting documents. It is useful to mention this indemnity in the letter for its deterrent effect.

How long is there to act before the claim is time-barred? Between traders, or between a trader and a non-trader, claims arising in the course of their trade are time-barred after five years under Article L110-4 of the French Commercial Code. After that period, judicial recovery becomes in principle impossible. The formal notice invites the debtor to react, but it is prudent not to wait until the limitation date approaches before commencing proceedings.

What is the difference between a formal notice and an order to pay? A formal notice is generally a registered letter drafted by the creditor or its lawyer. The order to pay is a formal act served by a commissaire de justice, the tariff for which is governed by Article A444-14 of the French Commercial Code. The order offers reinforced evidential force and precedes certain enforcement measures, but it is more costly; for a first call to perform, the registered letter often remains proportionate.