The pre-existing-damage scam
The fake-damage scam’s quieter twin. Instead of arguing about damage on return day, the shop sets the trap at the start — in the contract you sign — so the paperwork itself says you are liable.
This scam weaponises the rental contract. The condition record is left blank, kept vague, or has existing damage logged in a way that makes you responsible for it — so on return the document appears to prove the damage is yours. Beat it by reading the contract fully, walking the vehicle against its condition diagram, and marking every existing scratch onto the contract yourself before you sign.
The fake-damage scam is an argument with no referee — your word against the shop’s. The pre-existing-damage scam fixes that, for the shop, by getting a referee on side in advance: the signed contract. Once your signature is on a document that does not record the damage that was already there, the shop is no longer making a claim. It is reading one back to you.
The two scams are close relatives and often run together. This one is simply the groundwork — laid at the desk, before you have even started the engine.
How the pre-existing-damage scam works
The condition record is left useless
The contract’s vehicle-condition section — often a little diagram of a scooter — is blank, or filled in so loosely it records nothing. Existing scratches simply are not noted.
Or the damage is logged against you
In a more deliberate version, existing damage is written down — but as something you are accepting liability for, or in a section that reads as “renter to pay”. The wording does the work.
You sign without checking
The handover is friendly and quick, the contract may be partly in Thai, and you sign without walking the actual vehicle against what the paper says. The trap is now set, with your signature on it.
The contract is read back on return
When damage is raised on return, there is no argument to have. The shop points at the contract: it does not list that scratch as pre-existing, you signed it, therefore it is yours. The paperwork beats your memory.
The defence: check the contract against the vehicle
An honest contract and an honest vehicle will match. Your job at the desk is simply to confirm that — out loud, on camera, before you sign.
Read every line before you sign. Take your time. Find the deposit terms, the insurance excess, the fuel and return policy, and the vehicle-condition section.
Walk the vehicle against the condition diagram. Every existing scratch, dent and crack on the bike should be marked on the diagram. If it is blank, that is your job to fix.
Mark the existing damage onto the contract yourself. Note each mark in writing, and have a staff member initial it. Now the document protects you instead of the shop.
Get the contract translated if it is in Thai. Ask for a clause-by-clause explanation, or run a translation app over it. Never sign what you have not understood.
Photograph the signed, marked contract. Both sides, clearly legible — alongside your dated photos and video of the vehicle.
The warning signs
The vehicle-condition diagram on the contract is blank, or the shop fills it in for you without looking at the bike.
You are hurried through the signing — “just sign here, here, here”.
The contract is Thai-only and the shop discourages you from translating it.
You are not given a copy of the signed contract to keep.
Damage on the bike is visible, but the staff insist there is “no need” to write it down.
- What to check the contract against
- The actual vehicle, panel by panel
- Who marks the existing damage
- You do — then the shop initials it
- What you leave the shop with
- A photographed copy of the signed contract
If the contract is used against you
If a shop is pointing at the contract to say damage is yours, your dated pickup photos and video still stand — they record the vehicle’s real condition regardless of what the paper omits. Ask for the claim in writing and itemised, do not pay under pressure, and if it is not resolved, the Tourist Police handle rental disputes on 1155.
A contract being used against you?
The step-by-step plan for a damage or contract dispute — the evidence that counts, and how to bring in the Tourist Police on 1155.
What to do, step by stepCommon questions
What is the pre-existing-damage scam?
How do I check a rental contract before signing?
What if the contract is in Thai only?
The shop says the contract proves I caused the damage. What can I do?
Guide published 25 May 2026 by The Editors. Scam mechanics are described from documented renter experience and the editors’ own anonymous rentals. This is editorial information, not legal advice.