Guerin Reviews 

When dropping off the car, the guy looking over the car was overly thorough which I found odd. He carried some iPad and went over the car all over the place. This never happened before with any past rentals. It seemed he was looking for something to charge me. And he did! Apparently I scratched the driver front rim. Really??!! I told him this is not from me. But he spoke to the cashier inside the Guerin booth and they placed over 200euro charge! Scammers! I have since informed my bank to reverse the charge and they are looking into it. Common knowledge for Europeans is that North Americans have insurance. So they feel the need to scam our system. I asked Guerin to send me before pictures time stamped as to when I took the car as they are so diligent in reviewing every inch of the car, but no response! I also tagged in the Portuguese Police, they gave me a wrong website to lodge the complaint! I have yet to hear back from anyone one of them. DO NOT USE GUERIN. THEY ARE NOT TRUSTWORTHY. BEWARE. DO NOT BOOK WITH THIS COMPANY!!!!

My $250 euro rental ended up close to $625.00.
They upgraded us without permission, and it was to a lesser car than reserved.
Then the extra charges started hitting my CC.
They said to advise on return, I did, they did nothing and were extremely rude.
These people are thieves.
AVOID!!!!

PLEASE READ ALL OF THE NEGATIVE REVIEWS ON TRUST PILOT ABOUT THIS COMPANY!!!!!!!
Like many others have mentioned they will try and sell you additional insurance so you do not have to pay the excess in the event of an accident, despite us showing we had already taken out a comprehensive insurance with no excess via Booking.com through Zurich Re. We were also told not to worry what state the car was in, as we were covered whatever. Even when I decided to take photos of the existing damage I was told that it wasnt necessary as we had the top cover, as our vehicle had been parked in the road way and others where wanting to pass we drove off without taking photos! (BIG MISTAKE). On our return...Guess what!! scrathes apparently. We had hardly used the car and was not aware of any damage. When we arrived back at the airport one of the Gurin team looked over the car and we noticed them taking pictures and typing on a tablet. I asked if everything was ok and was told yes apart form a few scrathches, i asked where and he pointed to the front passenger wing, ignoring all the dents and scrapes over the rest of the vehicle.
I would NEVER use Guerin again and I would also not book through Booking.com as they were not interested in our complaint. My advise would be to read reviews and book directly and 100% take photo BEFORE and AFTER returning the vehicle, regardless of what insurance you have taken. The additional protection that we reluctantly agreed to is expensive and I fail to see how this would have worked in the event of a claim other than having to pay the full excess. I would guess that even if we did scratch the vehicle this would not have exceeded the excess and we would of paid this on our credit card and claimed back from Zurich re. STAY WELL CLEAR OF GUERIN !!

I rented a car from Guerin with their most complete insurance package (Pack Premium Gold), which is supposed to cover all mechanical breakdowns.
The car was rented for a trip to Spain. When it developed a fault, I had to drive it back myself from Spain to Portugal to swap the vehicle. The return document stated "No new damages" and full tank.
A month later, Guerin charged my card for "wrong fuel in the tank" and a full fuel replacement.
I asked for a workshop report, a fuel analysis, and an invoice for the alleged work. They provided none of it and kept ignoring my messages. After I escalated the matter formally, their entire response was a photo of a bottle with some pink liquid.
Lesson: even with their most expensive insurance, if something happens to the car, expect a charge on your card with no proof and no explanation.

SCAM ALERT! Avoid Guerin in Porto.
When returning the car, I explicitly asked about tolls and was told everything was clear. No invoice or rental confirmation was ever sent to my email. Later, they tried to charge my card without explanation, which my bank rightly blocked for security. Instead of simply contacting me – even though they had my phone, email, and address – they sent a debt collector after me with administrative fees three times higher than the original toll amount! Extremely unprofessional and dishonest. Read other reviews – this is a common trap!
ALERTA DE BURLA! Evitem a Guerin no Porto.
Ao devolver o carro, perguntei expressamente sobre as portagens e disseram-me que estava tudo regularizado. Nunca me enviaram qualquer fatura ou confirmação para o e-mail. Mais tarde, tentaram cobrar do meu cartão sem explicação, o que o meu banco bloqueou corretamente por motivos de segurança. Em vez de me contactarem – embora tivessem o meu telefone, e-mail e morada – enviaram o caso para uma agência de cobranças com taxas administrativas três vezes superiores ao valor original da portagem! Extremamente pouco profissional e desonesto. Leiam outras avaliações – esta é uma armadilha muito comum!

At pick up it is automated and you feel pressured to take extras you really dont need. I wanted to extend my month rental by a week and had to drive 1.5hrs back to the airport return the car and start a new booking. No way, I went and got a car from another rental company there are so many and they have better customer care. Unless the price is significantly lower do not use.

these guys are thieves...I was charged for a damage underneath passenger foor that I didn't do and didn't even notice when I picked up the car....should I have taken photos from every angles....
I sent a claim for wrong charging of my credit card and they didn't even reply...shame on them

Do NOT recommend! Paid extra for a GPS system for the time we were vacationing in portugal. Faulty equipment! GPS was old, outdated and did NOT work. We ended up using our phones the entire time and paying more to buy something to hook up our phones to in the car. We let Guerin know it was unfair to not be reimbursed for the equipment we paid extra for as it did not work and we could not use it! They said they understood and it would be taken care of. Then 2 MONTHS later a charge came BACK to our credit card for the GPS! Tried to argue it at that point with the credit card company as Guerin was being unethical. Guerin dumped a bunch of useless paperwork with the dates we "had possession" of the GPS (which was never the dispute... the rental was 3 hours away from where we were staying and we weren't going to waste a day driving 6 hours to drop it back off) and the charge remained on our credit card (i will be changing credit card companies as well. Capital One ruled in favor of the merchant despite the proof i had in emails about the system not working). DO NOT TRUST GUERIN at Lisboa airport. As other reviews have stated, they make up extra charges, are unethical, and clearly have zero concern for their customers, only how much money they can get away with.

Highly recommend this company Never to be used.

Horrible company. They add all sorts of extra charges without your consent. And they will try to say you have dents and scratches you never made to collect extra money. I was so grateful I took pics and video of the car before I drove it off the lot. DO NOT RENT FROM THESE THIEVES.

I was falsely accused of damage to the car upon return, even though I produced photos of vehicle prior to the rental. Getting them to credit me back the charges was long process, which needed legal intervention. After further investigation of this rental company, others had similar experiences. The rental company offered no compensation to me for this.

I rented a car from them. I took a video of the entire exterior of the car with the Guerin employee present in the video prior to ever entering. After returning the car, a few days later they sent me an email saying that I damaged the car with 'evidence'. The picture they sent didn't even show damage, lol. And they charged me almost $1000. Unfortunately for them, I had the video proof of what they car already looked like. My credit card company paid me back. There is a lot more to say about what happened, but this is the gist of it. Beware. They can scam you easily. Heartless.

We hired a car three times from the Funchal city branch and had a great experience.
The two employees who looked after us were super helpful and friendly.
That’s why we went back to them and will always use them from now on.

1 outstanding toll charge

The vehicle (Registration BH720S) was returned on 23 August 2025, yet I received no communication at all for over five months. I was never contacted by email or phone to advise of an alleged failed toll payment, nor was I given the opportunity to resolve the matter directly. The first notification I received was a demand that had already been escalated to a debt collection agency, which I find completely unreasonable.

During the rental period (over one month), numerous toll charges were successfully processed, and the credit card used for the booking remains valid. Despite this, one small toll charge of £7.56 was later claimed as unpaid, with disproportionate administration fees of £57.84 added, and no explanation as to why this charge was not included in the normal toll settlement.

Do Not use Guerin!

Unexpected charges at the end. I caused absolutely no damage to the car, I even took video before picking up the car, but they still insist I did damage to the rim and deducted 256 euros from my deposit.

Guerin is more expensive than other car rental companies, and I chose them believing they would be more honest and would not use deceptive practices. This is exactly because I previously had unpleasant experiences with other European car rental companies. Unfortunately, the result was the same. In the future, I might as well just rent from the cheapest company.

Not knowing the airport it was very hard to find the place- no information signs.
Same with the return, very vogue instructions.
But what’s more, 4 months after They fraudulently charge my credit card for highway toll at the time when I didn’t have the car and was still in the plane.

Car was pretty booked and paid for with Expedia. CA. When onside to collect car , additional charges 250% more were made . Car was extremely unreliable , engine codes , remote stopped working etc etc

I rented a car from Guerin Rent-A-Car (contract no. 4984293, license plate BA-60-ZM) and paid for the Via Verde toll service, including the daily fees, so that tolls would be charged automatically.

However, the tolls were never charged, and I was never contacted by the company (no email, phone call, SMS, or letter) to inform me of any issue or outstanding balance. There was also no attempt to charge my credit card.

I only became aware of the problem when I received official letters from the tax authority, already imposing two fines of €101.50 each, totaling €203, which I had to pay to regularize the situation.

I find this situation unfair, as I paid for the toll service and did nothing wrong. The issue was clearly due to poor internal handling by the company, yet I was left to bear the cost. To date, I have not been reimbursed.

I am sharing this review to warn other customers to be cautious.