How to properly dispute an incorrect invoice?

An invoice's due date is approaching, but the amount, service or quantity of goods does not match what was agreed. In such a situation, it is not reasonable to simply set the invoice aside or to pay it hastily. The question of how to dispute an incorrect invoice must be resolved in writing, clearly and promptly enough. This preserves evidence, gives the other party an opportunity to correct the error and reduces the risk of an unjustified claim or debt collection proceedings.

Start with what the invoice was issued for

An invoice is not, in itself, always sufficient proof that a payment obligation has arisen. It must ordinarily be supported by a contract, order, quote, handover certificate, acceptance of works or other agreement. It is therefore worth comparing the invoice against the documents on the basis of which the service or goods were ordered before responding.

Check in particular whether the invoice recipient's details are correct, whether the work or goods were ordered, in what quantity they were actually received and what price was agreed. VAT, late-payment interest, surcharges, the invoice date and the due date also warrant attention. Disputes arise particularly often where a contractor has added works to an invoice that the client did not order, or where a tenant is presented with a utility charge whose calculation is not clear.

Where an invoice concerns a company, also review who had authority to place the order. The actions of a board member, employee or business partner do not automatically mean in every situation that the company is obliged to pay the invoice. However, the assessment depends on what authority the person had and how the parties had previously conducted themselves.

When must an incorrect invoice be disputed?

The practical rule is simple: respond as soon as you notice an error or disagree with the claim. Do not wait until the last payment date, as silence may later make it more difficult to clarify the circumstances. Some contracts provide for a specific deadline for submitting a complaint, for example from the date of acceptance of the goods or receipt of the invoice. In that case, that deadline must be observed.

A claim may also be contested after the due date has passed, but delay may give rise to a claim for late-payment interest, reminders or debt collection letters. If you agree with the invoice only in part, you are generally not required to withhold the entire amount. The undisputed portion may be paid and the written response should explain which part is disputed and why.

For example, if a repair contractor submits an invoice for €2,500 but €500 worth of additional works was not agreed, the client may pay €2,000 and dispute the €500 portion. This does not automatically resolve the dispute, but it demonstrates good faith and limits the calculation of any late-payment interest to the undisputed amount.

How to submit an objection to an invoice?

The most reliable approach is to submit an objection in writing by email. If necessary, also send it by registered post or by another means that will subsequently allow you to prove both sending and receipt. An explanation given by telephone may help resolve an error quickly, but it should be followed by written confirmation.

An objection does not need to be written in complex legal language. What matters is that the invoice is clearly identifiable and your position is easy to understand. State the invoice number, date and the disputed amount. Then briefly describe why the claim is not justified and attach any available evidence.

You might word your response as follows:

> I dispute invoice no. 12345 in the amount of €680. The consulting service shown on the invoice for 8 hours was neither ordered nor provided on the agreed terms. Please provide a breakdown of the work performed and the documents confirming the order, and issue a corrected invoice. Until the dispute is resolved, I do not acknowledge any debt in respect of the disputed portion.

If the issue is a calculation error, it is reasonable to request a specific remedy: a corrected invoice or a credit note. If the service was defective, describe the defect as precisely as possible and attach photographs, correspondence, a handover certificate or other evidence. A bare statement that "the invoice is wrong" leaves too much room for interpretation.

Evidence often counts for more than emotions

In an invoice dispute, it is important to preserve all communications. Keep quotes, orders, emails, messages, contracts, work handover documents, photographs and payment orders. If the contract was concluded verbally, subsequent messages or witness statements may also help prove what was agreed.

Do not alter or delete correspondence that you find inconvenient. Even documents that do not fully support your position may help clarify the true substance of the dispute. A lawyer can assess which evidence is material and whether the other party's claim is justified in whole or in part.

If the party presenting the invoice is entitled to charge a fee but the amount is unclear, ask for an itemised breakdown. For example, administrative, construction, legal or IT service invoices may include hours worked, material costs, disbursements or contractual penalties. The party presenting the claim must be able to justify both the basis and the amount of their claim.

If the invoice has already been paid

An invoice that has been paid in error does not necessarily mean the money is lost. If payment was made as a result of a calculation error, a duplicate invoice or an unfounded claim, you may demand repayment of the overpaid amount. Here too, you should act promptly and explain why the payment was without basis or why part of the amount should be returned.

Payment may nonetheless affect how the dispute is assessed. If you paid the invoice after you were aware of a potential dispute, the other party may argue that you accepted the claim. This does not preclude a claim for repayment, but the circumstances and the purpose stated in the payment order become significant. It is therefore worth using the payment reference field during a dispute, or sending a written reservation before making payment.

What to do upon receiving a debt collection or court letter?

A debt collection company's letter does not make an incorrect invoice correct. If you have already disputed the invoice, send the debt collector a copy of your objection and note that the claim is disputed. If you have not previously responded, do so now and request the documents on which the claim is based. Ignoring a debt collection letter may unnecessarily escalate the situation.

A document received from a court, however, requires particularly prompt attention. Upon receipt of a payment order in summary payment order proceedings, an objection must be submitted within the time limit specified by the court. This is generally 15 days from the date of service of the payment order. If no objection is submitted by the deadline, the court may issue the payment order and enforcement of the claim becomes considerably more difficult.

An objection submitted to the court at this stage does not always need to be lengthy, but it must be submitted on time. You must subsequently be prepared to explain your position and evidence in greater detail. If the claim is substantial, the contractual relationship is complex or communication with the other party has reached an impasse, it is sensible to have the documents reviewed before submission.

The situation of a consumer, a tenant and a business is not always the same

A consumer may dispute, for example, a telecommunications, energy, repair or online store invoice where the service did not conform to what was agreed or the goods were not received. In tenancy relationships, it is necessary to distinguish between rent, service charges and obligations agreed in the contract. A landlord's claim for costs must be verifiable, and a tenant has the right in justified cases to request the documents underlying the calculation.

In relationships between businesses, the contractual terms, established business practice and documented orders often carry greater weight. A company must respond systematically, as unconfirmed or overlooked invoices may affect accounting, VAT calculations and the company's reputation for payment behaviour. At the same time, a company should not pay a claim simply because the invoice is formally correct.

When is it worth seeking legal assistance?

It is worth consulting a lawyer before a dispute becomes costly — particularly where late-payment interest or a contractual penalty is added to the invoice, the claim is based on a substantial contract, the other party is threatening court proceedings, or the invoice relates to real property, construction work, shareholders, an estate or a tenancy. Sometimes a well-drafted objection is sufficient; other times it is necessary to negotiate or to prepare a formal letter of claim.

Eurocity Law Office will listen to your situation, help assess the merits of the claim and explain in plain terms what the next practical step is. The aim is not to dispute every unwelcome invoice, but to find a justified and cost-conscious solution.

Keep your communications calm, precise and in writing. An objection submitted at the right time can save both money and time, and will give you a strong starting position even if the initial invoice dispute later proceeds to negotiations, debt collection or court.