When a car is purchased by the leasing company or broker and registered to them before being leased to a customer, then the car will be classed as pre-registered. This is common as it ensures the availability of cars and will reduce the lead time for these new cars. In some cases a pre-registered car will be offered at a discounted price which is pretty cool! When a car is in stock, it might be pre-registered but you can check with the leasing company. One thing to consider is if you are going for a 3 year lease deal, you should check the warranty of the car to check if the last few weeks could be out of warranty. But ultimately, pre-registered cars are typically cheaper, so it shouldn't be too much of a concern.