Four Ways a Service History Gets Faked
Most fakes follow one of four patterns. Once you know them, the warning signs are much easier to pick up on.
How to Spot Fake Service History When Buying a Car in Ireland
A stamped book is easy to fake. Here's how to test one against NCT results, garage invoices and the manufacturer's own records before you pay.
12 min read•Updated September 2026
Why It's Worth the Effort
A good service history makes a used car easier to sell and worth more, which is exactly why some sellers fake one. A forged or borrowed history can cover for skipped maintenance, a wound-back odometer or a past the seller would rather you didn't see. On a UK import, where the early records come from another country, gaps can be easier to paper over.
1. Stamps Copied From Real Garages
A rubber stamp carrying a genuine garage's name, address and phone number is cheap to have made. The stamp looks right because the garage is real. The garage just never saw the car.
How to catch it:
Look the garage up yourself rather than ringing the number in the book. Give them the reg or VIN, the date and the odometer reading, and ask whether they carried out that service.
2. A Book Borrowed From Another Car
A genuine, fully stamped book is taken from a scrapped or written-off car of the same model and handed over with one that has no history of its own. Every stamp is real; they just belong to a different vehicle.
How to catch it:
Match the VIN in the book against the car and its Vehicle Registration Certificate (VRC). On a UK import, older pages may show the previous UK reg rather than the Irish one, so match on the VIN, never the plate.
3. A Blank Book Filled In Overnight
Blank service books for most makes can be bought online. Add a handful of stamps and signatures and a car with no records suddenly has years of them.
How to catch it:
A book for an eight-year-old car shouldn't look brand new. Watch for the same pen, the same handwriting and the same stamp pressure on every page. Entries made years apart by different people never look that tidy.
4. Readings Changed in a Genuine Book
The book is real, but odometer readings have been altered, overwritten or crossed out so they agree with a clock that has been wound back.
How to catch it:
Put every reading in date order and set it beside the car's NCT results. Readings should only ever go up. On an import, check whether each entry is in miles or kilometres before deciding a figure has dropped.
Warning Signs in the Book Itself
Sit down with the book in good light and go through it page by page. Any one of these deserves a question. Two or three together are a good reason to walk away.
Service Book Warning Signs
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The same handwriting on every entry
Different technicians at different garages over several years don't all write alike
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One pen and one ink colour throughout
Entries made years apart should look like they were written at different times
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Stamps that look freshly made
Crisp, evenly inked stamps on entries from years ago are hard to explain
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A VIN that's missing or doesn't match
The VIN in the book must match the car and the VRC character for character
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Readings that jump about or go backwards
Compare with NCT results, and look out for a switch between miles and kilometres
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Garages that don't add up on the map
A stamp in Cork one month and Letterkenny the next, with no change of owner, needs explaining
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A book too clean for the car's age
An unmarked book for a ten-year-old car probably hasn't spent ten years in a glovebox
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Garages you can't find any trace of
Search every name; a business that never seems to have existed is a serious concern
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UK-era stamps with no UK reg to tie them to
On an import, ask for the previous UK registration and match the older paperwork to it
Checking a Service History, Step by Step
None of this takes long, and a genuine seller won't mind you doing it.
Step 1: Match the VIN Everywhere
The 17-character VIN stays with the car for life, through every change of owner, plate and country. It should be identical on:
- The Vehicle Registration Certificate (VRC, often called the logbook)
- The plate at the base of the windscreen
- The plate or label on the door pillar
- The service book and every invoice
- The plate in the engine bay, on models that have one
If they don't all match, stop there.
Step 2: Line Up the NCT History
The NCT gives you an independent view of the car's condition and odometer reading at regular points in its life: first at four years old, then every two years, and every year once the car reaches ten. Ask the seller for previous NCT certificates and set the readings alongside the service entries. They should climb steadily, and no service stamp should show a higher reading than a later NCT.
Step 3: Get the Miles and Kilometres Straight
Irish-market cars read in kilometres, while most UK imports read in miles, and ads and service entries sometimes mix the two. A reading that falls from 90,000 to 60,000 might be clocking, or it might be kilometres in one place and miles in another (60,000 miles is just over 96,000 km). Confirm the unit behind every figure before you draw conclusions, and be wary of a seller who can't tell you which the car uses.
Step 4: Ring the Garages Yourself
Pick one or two garages from the book, find their details independently and call them with the reg or VIN. Ask them to confirm:
- The date of the visit
- The odometer reading they recorded
- The work they carried out
If a seller is unhappy about you making those calls, treat that as a warning sign in its own right.
Step 5: Ask for Invoices, Not Just Stamps
A stamp only proves that somebody owned a stamp. An itemised invoice shows the parts and labour, the price (in euro, or sterling for UK-era work) and the reg or VIN it was raised against. Missing invoices aren't proof of fraud, but a history backed by invoices is far harder to invent.
Step 6: Check What the Manufacturer Holds
When a franchised dealer services a car, the visit is typically logged in the manufacturer's own system against the VIN, not written up by whoever is selling the car. A service history check by Irish reg or VIN shows you those records, so you can compare them with every main dealer stamp in the book.
Why Manufacturer Records Are Hard to Fake
Records entered by the dealer network have real advantages over a paper book when you're trying to tell a genuine history from a convincing one:
- Entered by the dealer, not the seller: only the franchised network adds entries
- Held against the VIN, not the plate: a new owner or a new registration doesn't change the VIN they belong to
- Independent of the glovebox: a lost or swapped book doesn't change what's on file
- Dated, with readings: each entry has a date and odometer reading you can check against NCT results
They have limits too. Manufacturer records cover franchised dealers only, so independent garage and DIY servicing won't appear. That isn't a sign of fraud; it just means those stamps need checking with the garage and the invoices instead.
If You Think the History Is Fake
If the checks turn up something that doesn't add up:
- Walk away rather than haggle: if the history is false, you can't trust anything else you've been told about the car.
- Keep a record: photograph the book, save the ad and keep any messages with the seller.
- If the seller is a dealer: the Competition and Consumer Protection Commission (CCPC) explains your rights when buying from a business and is the body to contact about a trader.
- If you believe it's deliberate fraud: report it to An Garda Síochána.
- Warn others where appropriate: a factual review can save the next buyer the same trouble.
Before You Pay: Quick Checklist
Tick These Off Before Handing Over Money
The Bottom Line
Fake histories keep turning up because plenty of buyers never check them. The steps above take an evening at most, which is very little next to the cost of buying the wrong car.
No single check is foolproof. But a book whose VIN matches, whose readings agree with the NCT history, whose garages confirm their stamps and whose main dealer entries line up with the manufacturer's records is very hard to fake.