Is an oral agreement valid and how to prove it?

"We did agree on it." This sentence often reaches a lawyer only after the work has been done, the money has gone unpaid, or the other party claims the terms were entirely different. The question of whether a verbal agreement is valid cannot be answered with a simple yes or no. In most cases, a verbal agreement can be fully binding, but in the event of a dispute the outcome depends on exactly what was agreed and what can be proved.

A written contract is not required for an agreement to become a "real" contract. It is required primarily so that both parties can easily understand, at a later stage, what was promised, at what price, by what deadline and on what terms. If those questions remain open, what appears to be a simple verbal agreement can turn into a costly dispute.

Is a verbal agreement valid under Estonian law?

Estonian contract law is generally governed by the principle of freedom of form. This means that a contract can come into existence verbally, through correspondence, over the telephone, via a messaging application, or through the actual conduct of the parties. For example, a person orders renovation work, the contractor confirms the price and deadline and begins work. If the client allows the work to be carried out, a contractual relationship will often exist even where no signed document is in place.

A contract does nonetheless require that the declarations of intent of the parties correspond sufficiently. One party makes an offer and the other accepts it. In practice, it must be assessed whether the agreement contained at least the essential terms: who the parties are, what is to be done or provided, what the consideration is or how it is to be determined, and when the obligation is to be performed. Not all contracts require the same level of detail. For the purchase of goods, the ordering of services, leasing or lending, the material terms may differ.

Mere general talk along the lines of "we'll work something out" may not yet create an obligation. Equally, sending a quotation may not mean that the other party automatically accepted it. What matters is the overall picture of the entire course of dealings and subsequent conduct: what was said, what was done, and how a reasonable person would interpret the situation.

When is a verbal agreement insufficient?

For certain transactions, the law requires a specific form. In such cases, the formal requirement cannot be set aside on the grounds that the parties trusted one another or that money has already been partially paid. For example, transactions involving the transfer of ownership of immovable property generally require notarial form. A notary helps to ensure that the parties understand the substance of the transaction and that the necessary entries and rights are properly arranged.

In other areas too, the law or the contract itself may prescribe written form. For example, an employment contract must generally be concluded in writing, but the absence of a written document does not automatically mean that an employment relationship has not arisen. Actually performing work, receiving remuneration and following the employer's instructions may clearly indicate the existence of an employment relationship. Instead, questions frequently arise concerning job duties, pay, working hours and the duration of the contract.

In business, contracts often include a clause providing that amendments are valid only in writing. Caution is advisable even where such a clause exists. If the parties begin to follow a new practice in fact over an extended period, a question may arise in a dispute as to whether they amended the agreement through their conduct. The outcome depends on the wording of the contract, the circumstances and the evidence available to each party.

The biggest issue with a verbal contract is proof

A verbal contract may be valid, but its content must be proved in court or in negotiations. In a dispute, it is generally not enough for one party to say: "That is how I remember it." Nor does the other party's denial automatically mean that no agreement existed. All reliable evidence is assessed together.

Most commonly, correspondence, emails, text messages and instant messages help to establish the existence of an agreement. For instance, a quotation sent before a telephone call and a message written after the call stating "agreed, please start on Monday" can be very significant. Invoices, payment orders, handover documents, work photographs, orders, calendar invitations and the parties' subsequent explanations may also carry weight.

A witness statement can likewise constitute evidence, particularly if the agreement was concluded in someone's presence. A witness does not, however, always replace a precise written record. People's memories differ, especially when a dispute arises months or years after the agreement was reached. It is therefore useful to confirm immediately in a brief message what was discussed by telephone or at a meeting: "I confirm that we agreed on the scope of work, a price of €2,000 and completion by 15 May." If the other party does not contest this or responds affirmatively, the situation at a later stage will be considerably clearer.

The conduct of the parties can also constitute important evidence. If the client has accepted the work, made use of the result and paid part of the price, this supports the claim that a contract existed. That said, partial payment does not always resolve every question. It may confirm that a service was provided, but not necessarily the agreed final price, the scope of additional work or the amount of any penalty for late payment.

Typical disputes and their true substance

In renovation and construction work, disputes frequently concern whether the price was fixed or approximate, whether additional work was ordered, and whether defects in the work were justified. A remark such as "just get it done, we'll sort it out afterwards" leaves far too much room for differing interpretations. Even where the main work was ordered verbally, written confirmation should be obtained for any additional work before it is carried out.

In tenancy relationships, questions arise concerning the security deposit, utility costs, the notice period and the condition of the premises. A verbal tenancy agreement may exist, yet at the point of moving out it is difficult to prove what the original condition of the premises was or which costs the tenant was required to bear. Photographs, meter readings and handover confirmations help to prevent later disputes.

In the case of a loan, a bank transfer may prove that money changed hands, but not always whether it constituted a loan, a gift, a capital contribution or another type of payment. When a loan is made to a close acquaintance, the repayment date is often left open. If the relationship deteriorates, this becomes the central problem. Even the description field of a transfer and a brief message setting out the loan amount and repayment terms can make a significant difference.

Between businesses the risk is greater, since agreements often concern larger sums, deadlines, liability and confidential information. A verbal order may be practical in day-to-day cooperation, but it is poorly suited to situations where the scope of work, price or liability may later give rise to disagreement. At the very least, the order confirmation, description of work and price should be recorded in a reproducible form.

What to do if the other party denies the agreement?

The first step is to gather and preserve materials. Do not delete messages, alter documents after the fact or send emotional accusations. Make complete extracts of conversations, retain original files, collect payment documents and write down a timeline of events: when discussions took place, who was present, what was promised, when the work was performed or the money changed hands.

It is then worth presenting the other party with a clear written position. The letter should describe the agreement, the unfulfilled obligation, the evidence available and a reasonable deadline for resolving the situation. For example, where an invoice remains unpaid, simply sending a reminder saying "please pay" is often not the most effective approach. A reasoned claim that links the amount to the specific work, the agreement and the deadline carries more weight.

If the other party contests the claim, it must be assessed whether pursuing it is reasonable having regard to the evidence and the likely costs. Sometimes negotiation or a compromise produces a result. Sometimes it is necessary to draft a formal letter of claim, respond to the other party's assertions or bring court proceedings. The decision depends not only on who is right in principle, but also on the strength of the evidence, the size of the claim, the time limits and the other party's ability to pay.

How to reduce risk in the future?

Not every everyday purchase requires a multi-page contract. However, the larger the sum, the longer the duration or the more complex the work, the more important it is to put the agreement in writing before it is performed. A clear email or exchange of messages will often suffice, provided it records the parties, the work or subject matter, the price, the deadline and any special conditions.

Do not leave undefined what matters most in a dispute: whether the price includes VAT and materials, who bears additional costs, when payment is due, how the work is to be accepted, and what happens in the event of a defect or delay. If the terms change, confirm the change through the same channel before any new work or expense arises.

If a dispute has already arisen, or if the agreement concerns significant assets, real estate, a business activity or a family relationship, early legal advice helps to avoid steps that are difficult to undo later. Eurocity Law Office will listen to your situation, help review the evidence and explain your options in plain terms. Sometimes a precisely drafted letter of claim is sufficient; sometimes a solid contract needs to be drawn up — a practical solution begins with getting the agreement and its supporting evidence clear at the right time.