Most car rental companies in Valladolid require a credit card for renting a car. This is because the credit card provides a form of security and can cover any potential damages or fines during the rental period.

When renting a car in Valladolid, you will typically need to provide a valid driver's license, a valid passport or ID card, and a credit card in your name. Some car rental companies may have additional requirements, so it's always best to check with the specific company beforehand.

Some car rental companies in Valladolid may allow drivers under 25 to rent a car, but they usually charge an additional fee called a "young driver surcharge." This fee is applied to drivers between the ages of 21 and 24, and it can vary depending on the rental company.

Most car rental companies in Valladolid include basic insurance coverage in the rental price. This typically includes third-party liability insurance and collision damage waiver (CDW) coverage. However, it's important to note that there may be deductibles and additional optional insurance coverage that you can purchase to reduce your liability in case of an accident or damage.

If you return the rental car late in Valladolid, you may be charged an additional fee for each hour or day that the car is overdue. The specific fee and policy will depend on the rental company you choose, so it's important to check their terms and conditions regarding late returns.

It is generally allowed to cross the border with a rental car from Valladolid. However, you may need to inform the car rental company in advance and pay an additional fee for international travel. Additionally, there may be restrictions on traveling to certain countries, so it's important to check the rental company's policy regarding cross-border travel.