Three weeks after the handover a message arrives. The clutch is slipping, or the engine light came on in Utrecht, or the buyer has had it looked at and been told it needs work. They would like their money back and they would like the car to come back to you.
The first thing to know is that this is a civil disagreement between two private people, and nobody holds a button that reverses a sale. The second thing is that your position depends almost entirely on what was said and written before the keys moved. If you are still at the stage of choosing how to sell, the comparison of selling privately, to a dealer or to a buyer service sets out which of these risks sits with whom. This piece is for the message that has already arrived.
We are not lawyers and none of this is advice on your case. It is where the published sources put a private seller, and where to go when the question gets specific.
Nobody can simply hand the car back
A sale between two private individuals is a contract, and a contract does not come undone because one side has changed their mind.
The Rijksoverheid page on rights and duties under a purchase agreement makes the shape of it clear: the agreement exists from the moment the two of you agree, and a spoken agreement counts. The same page lists what a buyer is entitled to receive, which is a product that is undamaged, complete, and in possession of the qualities the seller stated. That last phrase is the one that matters here.
What the buyer does not have is a right of return. The Consumentenbond, writing about regretting a purchase, puts the fourteen day cooling-off period where it belongs: with things bought online, by telephone or at the door. For something bought in person the phrase it uses is blunt, koop is koop, a purchase is a purchase.
The consumer rules need a trader on the other side
This is the part most buyers have wrong, and some of them have simply read the wrong page.
A consumer purchase (consumentenkoop) has two requirements, and the Consumentenbond’s page on what a consumer purchase is states both: a consumer on one side and a professional seller on the other. Buy from a shop or a webshop and the extra rights attach. Buy from a neighbour and they do not.
The Juridisch Loket says the same thing in the specific case. Its page on a bad purchase through Marktplaats explains that ordinary people selling their second-hand possessions are not a company or a professional seller, and that a buyer therefore has fewer rights than in a shop, including the point that the purchase cannot always be brought back. Its separate English page on problems after buying a used car is written around buying from a garage, where the buyer often does have a right to repair or a different car, and it stops to say that where the car came from a private seller, other rules apply.
The difference between you and a garage is not a matter of degree. A trader sells with a legal guarantee attached and a complaints route behind it. You sold a used car you owned.
What a private seller is still held to
Fewer buyer rights is not no buyer rights, and the thing that survives is what you said.
The Juridisch Loket is direct about it on that Marktplaats page: the seller must keep to the agreements made, and may not make false promises in the advert or in contact with the buyer. Its example is a product described as new that turns out to have been used. Put next to the Rijksoverheid wording about a product having the qualities the seller stated, the line is reasonably easy to see. A buyer can hold you to your own description. They cannot hold you to a standard you never offered.
And a buyer carries a duty of their own. The Juridisch Loket’s used-car page calls it the duty to check, and spells out what that looks like for a car: take a test drive, arrange an inspection before buying. Somebody who did none of that, it says, has fewer rights when problems come up later.
Most of these disagreements come down to one question: whether the fault was something you knew about and did not mention.
What you disclosed, and why it decides this
The advert and the messages are the record of what you offered, so they are the record that counts.
Write the advert accordingly, before any of this happens. Mileage, year, the date the roadworthiness test (APK) expires, the warning light that comes on cold, the rust on the sill, the air conditioning that has not worked for two summers. A fault you named is a fault the buyer bought. A fault you hid is the one that gives them something to stand on.
The same goes for the things you do not know. A used car with a long history has parts nobody has examined, and saying so in writing beats a confident guess. Describe the car you have been driving, including the parts you have been living with.
A line in the agreement recording that the car is sold in its current condition, with the known faults listed by name, is worth having. It records what both of you understood.
A written record is most of your defence
If you kept the advert, the photographs, the message thread and a dated sale note, you are in a strong position. If you kept none of it, you are arguing memory against memory.
Keep the advert text with its date, the photographs you took, and the whole message thread, including the part where the buyer asked about the noise and you answered. A photograph of the odometer and the bodywork on the day is hard to argue with. Note the mileage at the handover, and the date, and sign it twice.
Notice what the Juridisch Loket tells the buyer to rely on: the advert, and what the seller promised by chat, email or app. The same evidence decides the question both ways.
When it stops being general
If the buyer sends a formal letter, mentions a deadline, or raises a figure, stop composing replies from the internet and get advice on your own facts.
The Juridisch Loket is the free legal advice service, it has pages and sample letters in this exact area, and it answers in English. A legal expenses policy may cover advice too, and plenty of people here hold one without thinking about it. In the meantime, reply politely, keep it factual, and write nothing you would not want read out later.
One practical note: the car is now registered to the buyer at the RDW, so taking it back means a second transfer with everything that follows it. Understand that before you agree to anything.
If a single buyer, one appointment and no advert sounds better than the whole exercise, ask us for an offer. It costs nothing, nothing binds you until you accept, and the car is checked against your description before anything is paid.
Frequently asked questions
Can a private buyer legally return the car and demand their money back?
Not as a right. A purchase agreement binds both sides once it is made, and the fourteen day cooling-off period covers things bought online, by telephone or at the door from a trader. A buyer can still claim that the car did not match what you told them.
Do I have to give a guarantee on a car I sold privately?
No. A legal guarantee belongs to a consumer purchase, which requires a professional seller. The Consumentenbond and the Juridisch Loket both set it out that way.
What if the fault was something I genuinely did not know about?
Then your description was not false, and the buyer had a duty to check the car before buying. The Juridisch Loket names the test drive and a pre-purchase inspection as what that duty looks like.
Does a sale agreement saying “sold as seen” protect me?
It helps as a record of what you both understood, particularly with the known faults listed. It is not a magic sentence, and a written list of faults does more work than any formula.
The buyer is threatening to go to court. What do I do?
Get advice on your own facts from the Juridisch Loket, gather the advert, the photographs and the message thread, and keep your replies short and factual.
How long after the sale can a buyer come back to me?
No single date closes the question for a private sale, which is one more reason to keep the paperwork. Ask the Juridisch Loket about the time limits in your case.