Formal notice

The formal notice is the most widely used and most misused pre-litigation tool in French civil law. Recast by Order no. 2016-131 of 10 February 2016, it is set out in articles 1344 to 1345-3 of the Civil Code and covers a large part of contractual disputes: default interest, rescission, acceleration, transfer of risk, starting point for damages. Properly drafted, it resolves the dispute before it reaches the courts; poorly drafted, it is legally sterile and the creditor simply has to start again, often too late.

This guide is written for a well-informed reader - company director, borrower, creditor, colleague - who wants to understand how a formal notice of default works, what it can automatically achieve, when it can be avoided, how to serve it effectively and what action it calls for. The approach adopted is that of the practitioner: less emphasis will be placed on the canonical definitions than on the pitfalls that lead to lost business - time limits that are too short, omissions, uninterrupted prescription, forgotten article 750-1 CPC, forgotten resolutory clause, forfeiture of the term without reasonable notice.

Defining formal notice

The formal notice is a unilateral legal act by which a creditor summons his debtor to perform his obligation. It is not a procedural document within the meaning of articles 648 et seq. of the Code of Civil Procedure: the 1st Civil Chamber of the Court of Cassation reiterated this on 20 January 2021 (no. 19-20.680). It precedes litigation - it prepares for it, sometimes renders it pointless, and conditions certain of its effects.

Its system is structured around three characteristics. Firstly, it is interpellative It must enable the addressee «to become aware of the nature, cause and extent of his obligation» (Cass. 2e civ., 17 March 2022, no. 20-18.056). A vague letter, which refers to an unpaid debt without specifying the basis or the amount, is not a formal notice within the meaning of contract law. It is then receiver It only legally exists from the moment it reaches its addressee (Cass. 2e civ., 16 nov. 2004, no. 03-16.270). Lastly, it is comminatory The fact that a penalty is announced for failure to comply is what distinguishes it from a simple reminder.

A point of vocabulary. A formal notice is neither a summation (a document issued by a court-appointed official in a regulated form), nor a summons to pay (a protective document prior to seizure), nor a simple commercial reminder. It is the common law act by which a creditor makes a date to trigger contractual and legal sanctions. A summons and an order to pay are two types of formal notice; a registered letter with acknowledgement of receipt is another, just as legally valid.

What it is not

The formal notice does not create any new obligation - it notes the non-performance of a pre-existing obligation. It does not constitute a fault on the part of the debtor (Cass. 3e civ., 5 July 2011, no. 10-17.351) or an expression of bad faith (Cass. 1re civ., 17 Apr. 2019, no. 18-13.842). The debtor who receives it is not required to respond: he can pay, discuss, dispute, or remain silent. What changes is that from the moment of receipt, the automatic legal effects of article 1344-1 et seq. of the Civil Code begin to run.

Nor is it, on its own, a prior attempt at amicable resolution within the meaning of article 750-1 of the Code of Civil Procedure. A creditor who were content to send a formal notice before taking proceedings for a claim of less than €5,000 would have his writ of summons declared inadmissible ex officio: article 750-1, since decree no. 2023-357 of 11 May 2023, requires a genuine attempt at conciliation, mediation or participatory procedure. We come back to this in the section on procedural consequences.

Articles 1344 to 1345-3 of the Civil Code

The subject matter is Chapter IV of Title III of Book III of the Civil Code, as rewritten by the’order no. 2016-131 of 10 February 2016. Five articles govern the debtor's formal notice and three others, often ignored, govern the creditor's formal notice. All these articles came into force on 1 October 2016 and apply to contracts entered into since that date; earlier contracts remain subject to the old numbering (articles 1139 et seq. of the old Civil Code), but the substantive rules are largely the same.

Article 1344 lists the three permissible forms: summons by a court officer, a sufficiently formal summons (registered letter with acknowledgement of receipt is the most common form, but the law does not require it), or a contractual clause providing that the debtor is in default by operation of law only when the obligation falls due. This third option merits attention: it allows the debtor to avoid a step by simple stipulation. However, exemption clauses are controlled under consumer law - we return to this in the chapter on exemptions.

The articles 1344-1 and 1344-2 describe the automatic effects. The first causes default interest to accrue at the legal rate on obligations to pay a sum of money, without the creditor having to prove any loss. The second transfers to the debtor the risks of the thing to be delivered which he has not yet delivered. These two effects are central: they transform the formal notice from a simple reminder into a legal act with measurable consequences.

The articles 1345 à 1345-3 In the same way, the debtor can give the creditor formal notice to perform. This aspect is rarely studied, yet it is one of the most useful in practice: when a debtor offers to perform and the creditor refuses, the debtor can summon the creditor and, after two months, deposit the sum or sequestrate the thing, thereby freeing the debtor. This section is devoted to this below.

Acceptable forms: registered letter, court commissioner, email

The law recognises only three forms: the summons, the deed giving sufficient notice, and the contractual stipulation. In practice, the question that almost always arises is the same: how to send the formal notice ? Each method has its advantages and weaknesses.

Registered letter with acknowledgement of receipt

This is the preferred method. Its main benefit is evidential: the acknowledgement of receipt signed by the addressee establishes the date on which the summons was received, which determines the starting point for all legal effects. It costs little - a few euros per item - and is accessible to any creditor without an intermediary. Jurisprudence has long accepted that it constitutes an «act of sufficient interpellation» within the meaning of article 1344.

An important clarification. In a ruling dated 11 January 2023 (no. 21-23.957), the 1st Civil Chamber of the Cour de cassation held that the failure to take delivery of the registered letter by the addressee does not affect the validity of the formal notice: once the letter has been presented, the date that counts is the date of presentation, not the date of delivery. A debtor acting in bad faith who avoids collecting his registered letter is therefore not immune from the effects of the formal notice.

Summons by a court commissioner

Since the’order no. 2016-728 of 2 June 2016 and its full entry into force on 1 July 2022, the profession of judicial officer merged with that of judicial auctioneer to become the commissioner of justice. The term «huissier» (bailiff) is no longer used in contemporary legal writings, although it remains part of everyday language. Any document issued by a judicial officer - summons, report, service - is presumed to be authentic and is binding until proven false.

A summons issued by a court commissioner is more expensive (you should expect to pay around €100 to €200 for a simple summons), but it has two decisive advantages. Firstly, the evidential value of the document: the court commissioner personally records the delivery and his report is authentic. Secondly, the psychological effect: a creditor who takes the trouble to appoint a public official shows a determination that a registered letter lacks. In commercial matters, where the dispute involves large sums or the debtor is procrastinating, a summons is the preferred method.

Electronic mail

Article 1344 does not require a paper document. A formal notice sent by email is acceptable provided the document is identifiable (known sender, clear content), dated and receipt can be established. Case law is gradually validating this form: it is practical, fast and free, but it places the burden of proof of receipt on the creditor. Manual acknowledgement of receipt by the addressee, or an automatic acknowledgement mechanism, or dispatch by electronic registered mail in accordance with article L. 100 of the French Post and Electronic Communications Code, are sufficient to establish receipt.

In practice, email is recommended for initial reminders, B2B contacts between regular partners, or when the deadline is tight. It is not recommended for high-stakes litigation, where it is always in the creditor's interest to follow up the email with a registered letter or summons. Post Drafting and serving formal notice takes a closer look at the issue of electronic evidence and detailed SMS messages, which have also been accepted in recent case law.

Drawing up a formal notice: compulsory information

A poorly drafted formal notice has no legal effect. As the Court of Cassation clearly stated on 17 March 2022 (no. 20-18.056), the document must enable the addressee to to know the nature, cause and extent its obligation. Anything that does not contribute to this threefold objective is optional; anything that helps to achieve it is compulsory. A canonical list emerges from practice and case law.

First of all, the compulsory information. The deed must identify completely the sender and the recipient - company name, address, capacity (creditor, agent, lawyer). It must be dated - This date determines the starting point for legal effects and proof of anteriority in the event of a dispute. It must indicate the exact basis of the claim This includes the contract number, invoice number, delivery date and any contractual clause that has been breached. It must specify the exact amount due in principal and accessories, or the expected service (delivery, work, return). It must set a reasonable lead time. And if the creditor wishes to enforce a resolutory clause, he must expressly mention this clause on pain of ineffectiveness of the resolution (article 1225 paragraph 2 of the Civil Code).

The recommended wording is not compulsory, but its absence weakens the document. The explicit mention of «formal notice» makes the creditor's intention unequivocal. The announcement of the penalties incurred in the event of non-performance - default interest, damages, rescission, summons, acceleration - reinforces the warning effect. Finally, the signature secures the deed against any subsequent challenge.

The special case of the resolutory clause

Article 1225 of the Civil Code lays down a rule that you should know off by heart: the resolutory clause only takes effect if the prior formal notice expressly mentions this clause. A creditor who, in his notice of default, invokes «automatic cancellation» without referring to the text of the contractual clause would run the risk of having his cancellation invalidated by the courts. The wording must be literal: reference to the article of the contract, reproduction of the clause, reminder of the penalty for non-performance.

There is one important nuance: the rule only applies to automatic resolutions that come into effect by clause. For the unilateral termination at your own risk organised by article 1226 of the Civil Code - that which the creditor issues in the absence of any clause, in the event of sufficiently serious non-performance - the prior formal notice must, on the other hand, state «expressly that if the debtor fails to fulfil his obligation, the creditor will be entitled to rescind the contract». This wording is essential: without it, termination is not enforceable against the debtor.

How much time is reasonable?

Article 1231 of the Civil Code requires a reasonable period of time. This period is not quantified by law: it is determined by in concreto by the judge depending on the nature of the obligation, the urgency of the situation, professional practice and the complexity of the performance. Three quantitative benchmarks emerge from practice.

Eight days is customary for B2B commercial claims where the balance of power is balanced and professional practice is well established. Fifteen days is the defensive standard - a period that no court will consider excessively short unless there are special circumstances. Thirty days is prudent in consumer or credit matters, where European and domestic case law has been particularly demanding. Beyond one month, the formal notice risks losing its comminatory character; below eight days, it risks being disqualified by the judge as insufficiently reasonable.

In terms of mortgage loan, This issue has been severely ruled on by the Cour de cassation. In a judgment of 22 March 2023 (no. 21-16.044) and another of 29 May 2024 (no. 23-12.904), the 1st Civil Chamber ruled that abusive the clause in a property loan that provided for automatic termination after a simple formal notice to pay the outstanding instalments, without a reasonable period of notice. The Court of Justice of the European Union paved the way on 26 January 2017 (Banco Primus, C-421/14) by interpreting Directive 93/13/EEC on unfair terms. The lesson is clear: a period that is too short vitiates the contract and renders the penalty unenforceable. A banker who intends to terminate a contract must give reasonable notice - a week is not a week.

Automatic legal effects

As soon as it reaches the addressee, the formal notice automatically triggers a number of effects. This is precisely what makes it so valuable: the creditor obtains these effects without going to court, without demonstrating any prejudice, and without negotiating.

Interest on arrears at the statutory rate

Article 1344-1 of the Civil Code provides that «a formal notice to pay an obligation to pay a sum of money shall give rise to interest on arrears at the legal rate, without the creditor being required to prove any prejudice».». This effect is limited to pecuniary obligations: it does not apply to obligations to do, not to do or to deliver a thing. The legal rate is set every six months by decree and published by the Banque de France. It depends on whether the debt is owed by a private individual or a professional - the former rate being significantly higher.

In B2B commercial matters, this interest is combined with late payment penalties under article L. 441-10 of the French Commercial Code. On 24 April 2024 (no. 22-24.275), the Commercial Chamber ruled that the L. 441-10 II penalty itself constitutes interest on arrears, which cannot be combined with the statutory interest provided for in articles 1153 and 1231-6 of the Civil Code. In practical terms, professional creditors must choose their basis - they cannot stack the two.

Transfer of risk

Article 1344-2 places the risks of the thing on the debtor from the time of the formal notice. The rule is technical but important: if a seller, given formal notice to deliver a good that he was supposed to deliver, sees the good destroyed by force majeure between the formal notice and the actual delivery, he can no longer hide behind force majeure. He must either return the price or pay equivalent damages. Before the formal notice, the risks fall on the creditor; afterwards, on the debtor. The mechanism encourages the debtor to perform promptly.

Starting point for damages

Articles 1231 and 1231-6 reiterate that damages are only payable after formal notice has been given, unless performance is definitive. For obligations to pay a sum of money, interest accrues at the legal rate (1231-6). For other obligations, the compensatory damages provided for in articles 1217 et seq. apply. In both cases, the formal notice is the chronological starting point - without it, the creditor cannot claim compensation for the delay.

Forfeiture of term

When a contract contains an acceleration clause - typical of bank loans - the formal notice is often the trigger. On 10 November 2021 (no. 19-24.386), the 1st Civil Chamber made an important clarification of this point: where the formal notice states that if the borrower fails to pay within a given period, the loan will be accelerated, and the formal notice has had no effect, the loan will be accelerated if the borrower fails to pay within a given period. acquired at the end of the period without the creditor having to give any further notice. This represents a major procedural saving: a single, well-drafted formal notice automatically triggers the forfeiture of the term. Our guide forfeiture of term develops the conditions for the validity of this clause and recent case law on unfair terms.

The question of prescription

Contrary to popular belief, formal notice does not in principle interrupt the limitation period. It is the acknowledgement by the debtor (article 2240 of the Civil Code) and the application to the courts (article 2241) that produce the interruptive effect. A creditor who is content with successive formal notices and allows the limitation period to lapse would lose his right. There are, however, occasional exceptions arising from special legislation - in particular article L. 133-4-6 of the Social Security Code, which gives the URSSAF's formal notice by registered letter interrupting the limitation period, as validated by the 2nd Civil Chamber on 28 September 2023 (no. 21-22.501). Apart from these specific cases, it is prudent to consider that the formal notice has no effect on the running of the limitation period.

When formal notice is not required

The principle is that formal notice is necessary to obtain performance and to trigger contractual penalties. However, there are several cases in positive law where it is not required. Knowing about them avoids unnecessary procedures and, in certain commercial disputes, saves decisive time.

Definitive non-performance

Article 1231 of the Civil Code dispenses with formal notice where the non-performance is definitive. This covers situations where formal notice would no longer make any sense: the seller who had promised to deliver an item before the wedding ceremony, after that date; the craftsman who had to lay a floor before moving in; the carrier who had to arrive by a specific date. As soon as the non-performance is irreversible, article 1231 considers that summoning the debtor to perform would no longer have any useful effect. The creditor goes straight to the action for damages, without any preliminary step.

The emergency

Article 1226 in fine authorises unilateral termination without prior notice «in case of urgency». This notion is strictly assessed: it presupposes an imminent danger and a material impossibility of waiting for a period to elapse. The judges of the court of first instance admit it with parsimony, essentially in matters of construction (danger for the workers, risk of collapse) or contracts with instantaneous execution where any procrastination would render execution unfeasible.

Unnecessary formal notice

This is the most recent and most useful exemption. On 18 October 2023 (No. 20-21.579, published in the Bulletin and in the Report), the Commercial Chamber of the Court of Cassation, sitting as a section, established a major case law: «Such formal notice does not have to be given where it is clear from the circumstances that it is futile. Thus a court of appeal, whose judgment shows that the conduct of one of the parties was so serious that it had made it materially impossible to continue the contractual relationship, was not required to consider whether formal notice had been given.»

This decision marks a turning point. Until then, legal writers had been arguing over the exact scope of article 1226: should a creditor faced with seriously wrongful behaviour still send a formal notice of default, or could he dispense with it? The Commercial Chamber ruled in favour of pragmatism: where formal notice cannot change the situation, it is not required. In practice, this applies to sudden termination of commercial relations, betrayal of business secrets, serious and repeated breaches of a duty of loyalty and, more generally, all situations where the behaviour of the other party makes it materially impossible to continue the contract.

The contractual exemption clause

The parties may provide in their contract that formal notice will not be required by the mere occurrence of an event. Article 1344 in fine recognises this option: «if the contract so provides, by the mere fact that the obligation is due». In principle, this contractual dispensation is lawful between professionals, but it comes under the control of consumer law when it concerns a consumer. The Court of Cassation referred this question to the CJEU on 16 June 2021 (1re civ., no. 20-12.154) and the line of case law that has emerged requires judges to check that the clause is not unfair. In practice, an exemption clause applicable to a consumer will almost always be reclassified as unfair and set aside.

Commented model of a letter of formal notice to pay

No model dispenses with the need to reflect on the content. The one below is a framework, to be adapted to the specific case. It includes the mandatory and recommended information in an order that makes it easy to read.

Three comments on this model. Firstly, the express qualification «The word »mise en demeure" must appear at least once - it is the unequivocal expression of the creditor's will. Secondly, the reference to the legal text (articles 1344 et seq. of the French Civil Code) makes the process legally indisputable and reminds the recipient that it is not simply a reminder. Thirdly, the’list of penalties incurred must be concrete: it is this that gives the deed its binding force. A model that was content with a vague formula («in the absence of payment, we reserve all rights») would lose much of its effectiveness.

For obligations other than a claim for a sum of money - delivering a good, completing work, returning a deposit - the framework remains identical: identification, basis, object, time limit, penalties, invitation to amicable settlement. The only changes are the legal grounds invoked (articles 1217, 1221, 1223, 1224 of the Civil Code for compulsory execution and rescission) and the penalties announced.

After the formal notice: contesting, going to court

There are three possible outcomes to a formal notice. The first, and most common when properly drafted, is payment or enforcement. The second is silence on the part of the addressee, which opens up the procedural channels to the creditor. The third is contestation, in which the addressee does not pay but responds on the merits or form.

Contesting a formal notice

There are two ways in which the recipient can challenge this. On the background, In the case of a claim, the creditor may raise the fact that the claim is time-barred (five-year limitation period under ordinary law, two-year limitation period in consumer matters), ineligible (term not yet due, condition not met), extinguished (payment already made, set-off, novation), without cause (the claim does not exist or its principle is disputed), or the creditor's own fault justifying a plea of non-performance (article 1219 of the Civil Code). On the shape, For example, a debt collection company acting without a mandate, in breach of articles R. 124-1 et seq. of the French Consumer Code.

The dispute must be formalised in writing and sent to the creditor within the period of the formal notice itself, or before any legal action is taken. This often helps to defuse the dispute: a cautious creditor, faced with a well-argued dispute, prefers to negotiate rather than run the risk of judicial rejection.

Procedural steps open to the creditor

If the formal notice remains unfruitful and the dispute is absent or unfounded, there are four procedural avenues open to the creditor, depending on the nature and amount of the claim.

L'order for payment, The "injonction de payer" procedure, set out in articles 1405 et seq. of the Code of Civil Procedure, is the quickest way to deal with claims arising from contracts, statutes or commercial paper, provided that they are certain, liquid and due. The creditor applies to the president of the court (judicial or commercial, depending on the nature of the dispute), who can issue an order for payment without a hearing. The debtor then has a period in which to lodge an objection; failing this, the order is enforceable.

Le provisional injunction, The interim relief procedure, set out in article 835 of the Code of Civil Procedure, enables an advance payment to be made quickly where the obligation is not seriously disputable. This is particularly useful for commercial claims where the debtor is contesting the claim in a dilatory manner: the interim relief judge can order an advance payment corresponding to all or part of the sum owed, enforceable by provision, even if the merits of the case are decided later.

L'writ of summons remains the classic route for any dispute that exceeds the liquidated claim or raises a serious legal question. It is slower but allows a full debate on all aspects of the dispute. A creditor who wishes to obtain, in addition to the principal sum, damages, compensatory interest, specific performance or rescission of a contract, brings an action on the merits.

A fourth, and often overlooked, avenue is amicable methods. Since decree no. 2023-357 of 11 May 2023, article 750-1 of the Code of Civil Procedure requires a prior attempt at amicable resolution (conciliation, mediation or participatory procedure) for claims involving a sum of less than €5,000, boundary demarcation actions and neighbourhood disputes - on pain of inadmissibility raised ex officio. A creditor who ignores this stage will see his writ of summons rejected without examination of the merits. Formal notice alone is not an amicable attempt within the meaning of article 750-1; it must be accompanied by a formal approach to a court conciliator, mediator or lawyer involved in a participatory procedure.

Formal notice to the creditor (article 1345)

One aspect that is often overlooked deserves further development. Article 1345 of the Civil Code deals with the opposite situation: a debtor who is refused performance by the creditor. This situation arises more frequently than you might think - a creditor who disputes the nature of a delivery, a lessor who refuses part payment, a purchaser who blocks acceptance of a good for dilatory reasons.

A debtor in this position may send the creditor a formal notice of default. to accept or permit the performance. This formal notice has two immediate effects: it stops the accrual of interest owed by the debtor, and it transfers the risks of the thing to the creditor. If the obstacle is not removed within two months, the debtor may deposit the sum with a notary or the Caisse des Dépôts (article 1345-1), or sequester the item (article 1345-2). As soon as the debtor is notified of the deposit or sequestration, it is released of its obligation. The costs are borne by the creditor (article 1345-3).

This mechanism is an invaluable tool for debtors in good faith who are blocked by a hostile creditor. It gets them out of the impossible situation where, unable to pay, they would see their debt increase. In practice, it is used too little.

Special cases

Commercial leases and payment orders

In the case of commercial leases, formal notice takes a special form: the summons to pay, governed by article L. 145-41 of the French Commercial Code. This text is of public order: it imposes a deadline of’one month for the tenant to comply, and no clause in the lease can derogate from this. Any resolutory clause providing for a period of less than one month is null and void. deemed unwritten, The 3rd Civil Division of the Cour de cassation ruled on 6 November 2025 (no. 23-21.454 and no. 23-21.334) that this sanction applies to the clause in its entirety - not just the excess part of the period. A lessor who has stipulated an eight-day period therefore loses all possibility of enforcing a resolutory clause. In the case of residential leases, article 24 of the law of 6 July 1989 sets out a similar system, with specific provisions to protect tenants.

Debt collection between companies (B2B)

In commercial matters, late payment penalties under Article L. 441-10 of the French Commercial Code are payable as follows by operation of law The Commercial Chamber confirmed this on 21 October 2020 (no. 18-25.749). This rule applies even when the debtor is a non-trading SCI, provided that the creditor is a professional. However, formal notice is still useful for B2B creditors, as it triggers the civil default interest provided for in article 1344-1 (which is not cumulative with the penalties provided for in article L. 441-10, see Com. 24 Apr. 2024, no. 22-24.275) and, above all, it opens the way to the acceleration of the term and the cancellation of contracts with successive performance.

Consumers and amicable debt collection

When the formal notice is sent to a consumer by a third party acting on behalf of the creditor - a debt collection agency or specialist firm - articles R. 124-1 to R. 124-4 of the Consumer Code impose strict formalities: mention of the mandate given to the third party, the identity of the original creditor, the basis of the debt and the breakdown. Failing this, the deed is ineffective and the third party may be subject to criminal penalties. Lawyers, court-appointed agents and the creditors themselves are not subject to these formalities - which apply exclusively to commercial debt collection intermediaries.

The statute of limitations for actions by professionals against consumers is two years (article L. 218-2 of the French Consumer Code). It runs from the first unpaid incident in the case of credit, or from the date of service in the case of services. A professional creditor who allows this period to elapse by merely sending formal notices that do not interrupt the period will see his action definitively foreclosed.

International formal notice

If the debtor is domiciled abroad, the formal notice is served cross-border. The Regulation (EU) 2020/1784 of 25 November 2020, applicable from 1 July 2022 and replacing Regulation 1393/2007, organises the transmission of judicial and extrajudicial documents between Member States via transmitting and receiving agencies. Outside the European Union, bilateral conventions (in particular the Hague Convention of 15 November 1965) and the rules of private international law take over. The use of a court commissioner trained in cross-border service of documents then becomes essential.

Foreign laws have functional equivalents with their own specific features: the cease and desist letter Anglo-Saxon Mahnung German diffida Italian law. These acts do not necessarily have the same automatic legal effects as under French law - interest on arrears and the transfer of risks are not universal effects. The firm has devoted a study to this issue: see International formal notice.

Summary table: reminder, summons, formal notice, summons to pay

Act	Author	Shape	Legal effects	Typical use
Commercial relaunch	Creditor	Free (telephone, email, simple letter)	No automatic legal effect	First amicable approach, commercial relationship
Formal notice (LRAR)	Creditor or his lawyer	Registered letter, email with proof, letter against signature	Interest on arrears, transfer of risk, IR, acceleration, rescission	Pre-litigation collection standard
Summons	Commissioner of Justice	Authentic deed	Same effects as MED + evidential value + enhanced psychological effect	Large claims, recalcitrant debtor
Order for payment	Commissioner of Justice	Authentic instrument in conformity with the applicable text	Prior to seizure or application of the resolutory clause (L. 145-41 C. com., law 89)	Commercial lease, residential lease, preparatory seizure

This taxonomy guides practical choices: reminders are free but ineffective, formal notice by recorded delivery is the most balanced option, summonses are reserved for high-stakes cases, and summonses are subject to a special regime for certain specific types of litigation.