Green Motion is a scam company. We rented a car at London's airport in the UK, and already purchased insurance on a domestic rental website. However, when picking up the car, they insisted that our insurance didn't count and required us to buy their insurance. They said if we didn't, even a 1 cm scratch would cost us 800 pounds. We had no choice but to be ripped off by Green Motion. It didn't stop there. We did get a speeding ticket while driving in Liverpool. Green Motion emailed us and sent the police ticket, stating they don't care about the police fines, but they charge a 68-pound administration fee. We had to pay. After paying the admin fee, the police emailed us the next day asking for a 100-pound fine, which we paid. That was somewhat normal, but a month later, Green Motion took another 68 pounds from our credit card. We emailed them asking why, and they stated it was for a second fine, although there was no evidence or police ticket. After that, we had to cancel our credit card to prevent further unauthorized charges from Green Motion. This company is a total scam. We'll never rent from them again.