Most car rental companies in Oldenburg require a credit card for renting a car. This is used as a security deposit in case of any damages or additional charges incurred during the rental period. It is advisable to have a credit card when renting a car, but some companies may accept a debit card or cash deposit as an alternative. It is best to check with the specific car rental company for their payment options.

To rent a car in Oldenburg, you typically need to present a valid driver's license, a credit card in the driver's name for the security deposit, and a form of identification such as a passport or ID card. Some car rental companies may also require additional documents like proof of insurance or an international driver's permit (IDP) for non-EU residents. It is important to check with the specific car rental company beforehand to ensure you have all the necessary documents.

The cancellation policy for car rentals in Oldenburg may vary depending on the specific car rental company and the type of reservation you have made. It is important to review the terms and conditions at the time of booking to understand the cancellation policy. In general, if you need to cancel your reservation, it is advisable to do so as early as possible to avoid any cancellation fees or charges. Some car rental companies may offer free cancellation up to a certain time period before the reservation start time.

Most car rental companies in Oldenburg require drivers to be at least 21 years old to rent a car. However, some companies may have a higher minimum age requirement or charge an additional fee for drivers under 25. It is best to check with the specific car rental company for their age restrictions and policies regarding drivers under 21.

If you return the car late in Oldenburg, you may be charged an additional fee by the car rental company. The fee is usually based on an hourly rate or a daily rate, depending on the company's policy. It is important to inform the car rental company in advance if you anticipate that you will be returning the car late. This will allow them to make appropriate arrangements and may help you avoid or minimize any additional charges.

Driving a rental car from Oldenburg to other cities or countries is generally allowed, but it depends on the car rental company and the terms of your rental agreement. Some car rental companies may have restrictions on driving their vehicles outside of Germany, while others may allow it with certain conditions or additional fees. It is important to inform the car rental company of your travel plans and check their policy regarding cross-border travel before renting the car.