Table of contents
When a complaint starts it is almost never a legal matter. It becomes one the moment the wrong first sentence is said at the counter. At its core it is simple: you promised a result, and if that result is not there, the customer is entitled to have it put right. Against that stands your right to carry out that remedy yourself, before another workshop touches the car.
That right to a second attempt is the most important tool in the complaint conversation, because it leaves both sides a way out. The customer gets their problem solved without paying again. The business keeps control over the finding, the effort and the result. Start arguing instead and both lose.
This article first separates what is a defect from what is dissatisfaction. Then it covers time limits, burden of proof and the role of your own terms, the routine inside the business, goodwill as a deliberate decision, and the case where the customer leaves the invoice unpaid. It is not legal advice: where it gets serious the matter belongs with a lawyer or a conciliation body, and which one applies to you is something your trade association knows.
Defect or dissatisfaction: that distinction decides everything
On repair work you owe a result, not an effort. There is a defect when the work does not have the agreed qualities or is not fit for what it was meant for — in workshop language: the fault is still there after the repair, something other than what was ordered was done, or something was damaged during the work.
Everything else is dissatisfaction. That matters, but it follows different rules: duration, a feeling about price, the tidiness of the interior or the tone on the phone give rise to no claim for a remedy. The confusion happens daily anyway, usually because both sides use the same word.
| What the customer says | Where it stands | First step |
|---|---|---|
| That noise is still there | probably a defect | give an appointment, test drive together, record the finding |
| Two weeks later a light is on again | open: could be a different fault | read out the fault memory and print it, compare with the earlier printout |
| It took far too long | not a defect | explain what happened, decide on goodwill as such if appropriate |
| This was too expensive | not a defect but a price question | go through the invoice line by line against the estimate |
| There is a scratch on the wing now | damage during handling, not a matter of defect law | record and photograph immediately, involve your liability insurer |
| Now something completely different has broken | a job of its own, as long as there is no connection | look at it, name the connection, and only then talk about cost |
One sentence makes the matter worse every time: That is not a defect. Even when it is right, it comes too early. First the finding, then the classification — in that order a customer will accept a no as well.
Carry out the remedy yourself and you keep control over the finding, the effort and the result.
Time limits, burden of proof and your own terms
Claims for a defect are subject to a time limit, and it does not start at the invoice date but at acceptance — for a workshop, as a rule the moment the customer gets their car back. Exactly how long that limit is differs by country and by type of work. Look it up once for your situation rather than taking it from an article.
Shortening it through your own terms
Whether you may shorten that period in your own terms of business, and how far, is likewise a question with a local answer — and the floor that goes with it is not there by accident. Have it checked before it goes on your job sheet, not when somebody is waving it at you.
The practical mistake sits somewhere else entirely: in making the terms apply at all. Terms only apply if the customer was expressly pointed to them before the contract was concluded and had a reasonable opportunity to read them. On the back of the invoice they are therefore worthless, because the invoice comes after the contract. Their place is the job sheet above the signature, backed up by a copy displayed in the reception area. Anyone wanting to rely on a shortened period has to know first whether their terms ever became part of the contract.
Who has to prove what
After acceptance it is as a rule for the customer to show that the work was defective. The reversal of the burden of proof many people know from consumer sales does not apply to work done to order in the same way — that is one of the most common confusions in this area.
You cannot sit back on it, though. In practice an expert decides on the basis of what was recorded, and usually only one side recorded anything. A printout of the fault memory before and after the work, measured values, photographs of the condition at intake, parts invoices with an order number: that is the difference between an assertion and evidence. How long you have to keep those documents and how they stay unalterable belongs to the books and has its own periods — ask your accountant.
The part the supplier stands behind
If a newly fitted part fails, the customer comes to you and not to the supplier. You only get your own claim against that supplier to work if you can trace the part. Order number, supplier and fitting date therefore belong on the job sheet and on the invoice — the same record you need for a complaint anyway.
The routine that keeps the complaint small
Complaints almost never escalate over the technical side. They escalate because the customer gets the feeling that nobody is picking the matter up. Seven steps are enough to prevent that:
- Give an appointment immediately. No stringing along. Whoever takes the complaint sets the tone of the whole case.
- Test drive with the customer. They let you hear the symptom, you hear it yourself. That saves half the search and takes the edge off.
- Record the finding. Fault memory, measured values, photographs, mileage, date.
- Classify it and say so. Your own defect, consequential damage from earlier work, a different fault or a misunderstanding — with a commitment about when you will take it further.
- Carry out the remedy, without an invoice, if it was your own defect. Half a job costs you the second appointment.
- Report back. What it was, what was done, why it will not come back.
- Follow up. One call after two weeks closes the case for the customer for good.
Who in the business may decide what
Two arrangements save most escalations. First a goodwill limit: up to what amount does the service adviser decide without consulting anyone? Without that limit every complaint goes via the boss. If the boss is under a car, the customer waits. Second a response time: report back the same day, an appointment within a set period. Both belong on paper, otherwise they apply only to whoever thought of them.
Goodwill is a decision, not a concession
Where there is no defect but you want to keep the customer, goodwill is the right instrument — provided it is named, quantified and recorded. A discount without a label becomes a claim next time. On the document side the same care applies as elsewhere: an invoice already sent is never overwritten or deleted but corrected according to the rules for that.
Related articles
When the customer leaves the invoice unpaid
The classic course of events: the complaint is still running, the invoice is outstanding, the customer pays nothing. As a rule they may only do that in part. Where there is a defect a customer may withhold a portion of the payment — a portion in proportion to what the remedy costs, not the whole amount.
That can be worked out at the counter. If the remedy costs about a sixth of the invoice, the conversation is about that sixth and the margin around it, not about the whole bill. The rest is simply due. What multiple of the remedy cost is the yardstick where you operate is worth asking before you argue about it; somebody who pays nothing at all is in default, and then a quite different process begins.
Holding the vehicle has a hole in it
A business that has worked on a vehicle has, in many legal systems, a means of holding it until the bill is paid. The catch always sits in the same place: such a right attaches to the property of whoever placed the order. If the vehicle belongs to a leasing company or is pledged to a finance house, that is not your customer, and then there is nothing to hold. Hold such a car anyway and you turn a claim for money into a liability problem.
The registration document only helps so far: it names the registered keeper, not necessarily the owner. With company cars, young used vehicles and anything that smells of leasing, the question of who owns it belongs at intake and not at the escalation.
When the customer drives to another workshop
If the customer has the defect put right elsewhere and sends you the bill, the first question is not whether that price was reasonable. It is whether they gave you a period beforehand to put it right yourself. Without such a period they are as a rule left with the cost. Exceptions exist where the remedy was seriously refused, failed, or could not reasonably be expected of them — which is exactly why it is expensive to brush a complaint off on the phone.
Storage charges for a vehicle left standing for weeks after the repair, incidentally, can only be charged if you agreed them. Their place is the job sheet, not the reminder letter.
When it escalates anyway, and what the business gets out of it
If the dispute persists, court is rarely the cheapest route. For the motor trade, many countries have conciliation bodies attached to the trade association that judge technical matters with expertise. For the customer such a procedure is often free; for the business it is usually cheaper than a route involving an expert. Which body comes into play for you, and whether taking part binds you, is a question for your trade association — it differs by country and by scheme.
Two points on your website
Go through what your site says about dispute resolution once, and whether it is still correct. Anyone arriving at your website through a complaint looks there first, and a reference that leads nowhere is a poor first impression at exactly the wrong moment.
Concretely, for businesses inside the EU: the European online dispute resolution platform closed on 20 July 2025, and with the regulation behind it the duty to link to it fell away too. If the link is still in your imprint or your terms, it is not only the link that has to go but the sentences around it and every further mention. A mandatory reference to something that no longer exists is worse than no reference.
In that clearing out, the only systematic mistake is throwing away too much. That this one platform has gone does not mean every duty to inform about dispute resolution has gone — they are independent of one another. Delete the platform passage and take the rest with it for convenience and you swap one mistake for another. The block about the platform can go; check the rest of what you say about complaints and disputes separately.
Every complaint is a measurement
The real return comes after the case. Note a cause category with every complaint: diagnosis, execution, part, communication, scheduling. Counting once a quarter is enough. Three cases from the same category are not bad luck but a process fault. That is cheaper to fix than the fourth case.
The second return is public. A well-handled complaint is the most common occasion for a good review, because the customer has experienced what happens when something goes wrong — provided somebody asks them for that review at handover, with nothing given in return. That is the experience they pass on, not the repair that went right first time.
Complaints rarely cost a business the money the boss fears. They cost time, energy and occasionally a customer — usually where an appointment came too late, a legal verdict too early, and an answer somewhere in between. The routine is short: give an appointment, look at the symptom together, record the finding, classify, remedy, report back.
Two things the business produces itself in the process: the record that decides the evidence question in a dispute, and the documents that make a goodwill gesture or a correction traceable. How both arise without extra work is what the invoicing program for workshops shows; what the whole operation gets out of it is on the page about workshop software.
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