5 Worst Car Rental Scams

I have been renting cars for 25 years, and believe me, I have experienced and am still experiencing scams and traps on a regular basis. 

From hidden fees that hit my card weeks later, which happened when I rented a car in Costa Rica, to agents refusing my full, cheap insurance at the counter, when I rented a car in Spain. And these scams have evolved and changed.

In this guide, I’ve identified the 5 worst car rental scams that you can expect, and I am going to tell you how to fight back

The Most Annoying Car Rental Scam to Avoid

Let’s start with the first scam, the most common and damaging one: Charging for Pre-Existing Damages. 

This is a classic. You return the car, and the agent finds a small scratch, which was actually already there, but they “missed” documenting it in the rental contract during pickup. They hope you’re too tired or possibly missing the flight. So you won’t argue and pay $300-$400 for that scratch. 

What is the solution?

Before you drive off, take a detailed set of photos of every panel, the wheels, and the windscreen, focusing on any small marks, including on the rooftop and the undercarriage on the four sides of the car. 

Remember also to take photos of the interior of the car, especially if you see cigarette burns or white marks that are usually caused by saltwater. These damages are sometimes not even refunded by a full insurance policy

This is your definitive proof. If they try to charge you, you immediately present the photo proof and request their manager. It has happened to me multiple times, last time in Greece, and the photos were a lifesaver.

The Insurance Refusal Scam

Let’s move to the second scam, what I call the Insurance Refusal Scam. This is the biggest money maker,….. for the car rentals. 

The car is usually rented with Third Party Liability Insurance and Collision Damage Waiver, but with an excess or deductible that sometimes is as high as $7,000, which is your max out-of-pocket in case of an accident.

Rightly so, you want full insurance to cover this excess. You may have it already included in your credit card travel insurance, or you may decide to buy it on a specialised website.

Now you arrive at the desk with your third-party full insurance, and the agent will pressure you, saying, “Your external insurance is not valid here,” or, “That insurance is not valid in this country”, This is a lie designed to force you into their expensive full coverage, which usually costs between $30 and $50 a day.

What is the solution?

Well, the law is usually on your side, but fighting in a foreign airport, maybe in a different language, is honestly hard, if not impossible. 

My solution is instead to buy full insurance directly on my favourite comparison website called DiscoverCars for just $8-$9 a day. This website is great because it works like an Airbnb for car rentals, where every provider is rated between 5 and 10 stars based on real customer feedback.

I usually book from providers with 8 or even 9 stars, basically the most trusted operators, typically at a very competitive price.

Using the same platform to rent the car and get the insurance drastically limits, or even zeroes, the possibility for the counter agent to pressure me. Honestly, it’s the cleanest way to shut this scam down.

My biggest tip here: if you find any interesting deal, I suggest booking straight away because cancellation is usually free of charge (up to 48 hours before the pickup on DiscoverCars).

The Fuel Policy Scam

Let’s move to the third scam: The Fuel Policy Scam. 

This one is sneaky and relies on you being tired and rushed when returning the car. The agent convinces you to take the car with a full tank and return it without fueling it up, saying, “You’ll save time, and you won’t get stressed searching for a petrol station at the end of your holiday.” 

The trap is that they will charge you for the missing petrol, but at an inflated price. For example, I noticed a 25% markup on one operator during my last car rental in Sydney.

What is the solution?

Always, and I mean always, choose the ‘Full to Full’ policy. Fill the tank at a station just outside the drop-off zone and keep the receipt. I always take a quick photo of the fuel gauge and the odometer when I return the car. It takes just two seconds, but it can save you some money.

Never let them pressure you into paying for their tank.

The Hidden Admin Fee Scam

Scam Number 4 is the Hidden Admin Fee Scam. This one hits your credit card weeks or even months later. 

You might accidentally run a toll without an account, or a speed camera gets you. The original fine itself might only be $20 or $30. But the scam is that the rental company adds a huge, disproportionate ‘Administration Fee’—sometimes $50 to $100 per fine—just to process the ticket and forward your details to the authorities.

Just to give you an idea, 2 years ago, I got fined when I rented a car in Germany for driving just 5km above the 100Km limit. I got fined, 20 Euros; however, by the time I received the mail from the car rental, the bill was close to 100 euros, including the admin fees.

What is the solution?

Plan your tolls. Before you drive off, ask the agent exactly how automated tolls work in that country or state. For example, in Australia, it’s all digitalised, and you need to pay online within 72 hours. Europe is partially digitalised and partially with tolls where they accept credit cards or cash, and I could keep going. 

If you do get a fine, like illegal parking, try to pay the fine yourself directly to the local authority before the rental company receives the ticket. Bypassing their processing means you avoid their admin fee. You are responsible for the fine, but not the scamming fee.

Of course, for speeding tickets, like in my case, the only solution is to pay double attention to the limits, which I did not, unfortunately.

The Dirty Car Fee Scam

And finally, Scam Number 5: The Dirty Car Fee Scam. 

This one is a pure profit grab, often targeting travellers who drive along the coast to beaches or dusty roads. You return the car, and the agent charges you a “special cleaning fee”, up to $100, because the car is “too dirty” or has a little sand in the mats. 

This happened to me with a car rental in Melbourne that wanted to charge me $80 just because of some sand in the mat and back seat. Luckily, I had some spare time to clean the car; it took me literally 5 minutes. I believe that in some cases, they give it a try, they hope you are in a rush for the flight, so you pay and leave.

What is the solution?

The best way to fight this is to remove the evidence.

Before you drop off the car, take two minutes to clear out any visible rubbish or sand. Even better, if you’ve been on the beach, spend $5 or $10 at a car wash for the quickest available wash, including a quick vacuum of the interior. 

This small expense is cheap insurance against the fraudulent cleaning fee. If they still try to charge you, firmly decline, show them your cleaning receipt or proof photos, and ask for their written policy outlining excessive dirt.