A signature is less crucial than you think

A signature is not a legal requirement for most agreements. Under Dutch law, freedom of form applies: an agreement is formed by offer and acceptance, regardless of whether it is in writing or signed. You can therefore be bound by agreements without having signed anything, and even before a contract is final. The signature plays a role primarily as evidence, not in validity. Anyone who believes they only have obligations *after* signing runs an unnecessary risk as a result.

Is an oral agreement without a signature legally valid?

Yes. The basic principle in Dutch contract law is that an agreement is formed as soon as there is an offer that is accepted by the other party (Article 6:217 of the Dutch Civil Code). For most agreements, there is no formal requirement: they may be concluded orally, by email, via WhatsApp, or even through actual conduct. A written and signed contract is therefore preferable, but as a rule not mandatory.

There are exceptions to this general rule. For certain legal acts, the law does prescribe a written form or even a notarial deed, for example, the purchase of a home by a private individual or the transfer of real estate. Are you unsure whether your agreement is not subject to formal requirements? Have this checked in advance, as a formal error can affect the entire agreement.

Oral, written, or digital: does the form make a difference?

For validity, the form usually makes no difference, but for proof it matters all the more. An agreement via WhatsApp or email is in principle just as binding as a verbal or signed agreement. The difference lies in how easily you can prove later what was agreed upon:

• Oral: valid, but the most difficult to prove. You rely on witnesses or the conduct of the parties.
• Email and WhatsApp: valid and immediately recorded. Messages constitute strong evidence of both the existence and the content of the agreement.
• Written and signed: valid and the strongest in terms of evidence, certainly with a (qualified) electronic signature, which can be legally equated to a handwritten signature.

In short: the signature is not a switch that "turns on" the agreement, but an instrument to strengthen your evidentiary position. If you want to properly cover all bases in your agreements, take a look at our model contracts for entrepreneurs.

Why a signature is valuable after all

An oral agreement is valid, but difficult to prove. If a dispute arises later, you must be able to demonstrate that an agreement was made and what exactly its content was. A signed contract speaks for itself; with an oral agreement, you are dependent on other evidence. Useful evidence may include:

• email or WhatsApp messages referring to the appointment;
• a quotation or order confirmation that has been (implicitly) accepted;
• statements from witnesses who were present during the conversation;
• invoices, payments or commencement of performance showing that the parties complied with the agreement.

The signature therefore primarily reduces your risk of proof. For this reason, it remains wise to record important agreements in writing, even if you are strictly speaking already bound. Should it nevertheless result in a dispute, good legal assistance of great value in substantiating your position. If an agreed payment is not made, debt collection be a way out, provided you make the existence of the agreement plausible.

Can you be liable before signing?

That is also possible. Many entrepreneurs believe they may break off negotiations at any time without obligation, as long as nothing has been signed. That is not entirely correct. As soon as parties negotiate with each other, a legal relationship arises that is governed by the requirements of reasonableness and fairness. Consequently, breaking off advanced negotiations can, under certain circumstances, result in liability for damages.

At the same time, the starting point is that parties are in principle free to break off negotiations. The Supreme Court applies a strict standard in this regard, calling for restraint: breaking off is only unlawful if, in view of the other party's justified reliance on the conclusion of the agreement or other circumstances of the case, doing so would be unacceptable. The threshold for liability is therefore high.

Historically, three phases are often distinguished in the pre-contractual phase, an idea that harks back to the classic Plas/Valburg judgment:

1. Initial phase: parties may freely break off negotiations without consequences.
2. Intermediate phase: termination is still permitted, but the terminating party may be required to reimburse the other party for costs incurred.
3. Final phase: breaking off is unacceptable if the other party was justifiably entitled to rely on an agreement being reached; in that case, even compensation for lost profits may be at issue.

In subsequent case law, this rigid phase model has been nuanced: in practice, the phases overlap, and the emphasis lies on the trust created and all the circumstances of the case. The judge takes into account, among other things, how far the negotiations had progressed, the extent to which both parties contributed to the trust, and whether unforeseen circumstances were at play. The outcome depends heavily on the facts, so have your position assessed if in doubt.

Avoid disputes with a preliminary agreement

Do you want to avoid ambiguity and pre-contractual liability during lengthy or complex negotiations? Then establish in advance how you will negotiate and what happens if things go wrong. This can be done via a letter of intent or a preliminary agreement. In it, you regulate, for example:

• under what conditions the negotiations may be broken off;
• who bears which costs if no deal is reached;
• the confidentiality of exchanged information, possibly supplemented by a confidentiality agreement;
• which agreements are already binding and which are not yet.

This way, the situation is clear to all parties in advance, and you avoid costly discussions afterwards.

"Obligations only after signing" — does such a clause really work?

A draft agreement often states that obligations only arise after signing. Such a provision offers guidance but is not an absolute guarantee. For example, if a party has promised to "sign the draft tomorrow" and subsequently backs out, the other party may, under certain circumstances, have been entitled to rely on the fact that the agreement had already been finalized. The draft then serves as a written record of what had already been agreed upon verbally.

A clause that stipulates that all obligations arise only after signing constitutes an additional hurdle. Whether it holds up in a specific case depends on the wording and the circumstances. It is therefore wise to carefully formulate such clauses (or have them formulated) rather than relying on standard texts. It is preferable to have an important draft legally reviewed before jeopardizing your position.

Practical tips to protect your position

• Be explicit about non-binding nature. State in quotations and emails whether, and until when, something is still without obligation.
• Document agreements. Briefly confirm verbal agreements by email; this serves as immediate proof.
• Do not underestimate the pre-contractual phase. The further the negotiations have progressed, the greater the risk of a sudden breakdown.
• Use a preliminary agreement for larger or longer projects.
• Sign consciously. Only sign when the content is correct, because after that the proof is virtually conclusive.

Frequently Asked Questions

Am I bound by a verbal agreement without a signature?

In most cases, yes. Due to freedom of form, an agreement is concluded through offer and acceptance, even without a signature. The challenge lies primarily in proving exactly what was agreed upon.

Am I always allowed to break off negotiations before a contract is signed?

In principle, you are free to break off negotiations. However, under certain circumstances, this may result in a liability for damages: as negotiations progress and the other party was justifiably entitled to rely on a deal, you may be required to reimburse the other party's costs or, in exceptional cases, pay damages for lost profits.

Is an agreement via email or WhatsApp legally binding?

In principle, yes. Due to freedom of form, messages via email or WhatsApp can also constitute a valid agreement. The advantage is that such messages immediately serve as proof of what has been agreed.

Does the phrase "obligations only after signing" protect me fully?

Not entirely. Such a clause helps, but under certain circumstances, the other party may still have been entitled to rely on the fact that an agreement already existed. The precise wording and the facts are decisive.

What proof do I have with an oral agreement?

Consider emails, WhatsApp messages, an accepted quote, witness statements, and the start of execution such as invoices or payments. Written confirmation afterwards significantly strengthens your position.

When is a written contract actually mandatory?

Formal requirements apply to specific legal transactions, such as the purchase of a home by a private individual or the transfer of real estate. Are you in doubt? Have this checked in advance.

Need help with contracts or negotiations?

Are you unsure if you are already bound, do you want a binding preliminary agreement, or are you stuck in negotiations? The legal experts at MKB Juristen help entrepreneurs daily with clear, legally sound agreements. View our expertise in contract law or schedule a no-obligation intake directly. This way, you know exactly where you stand, even before a signature is put down.