The minimum age requirement varies by country and rental company. In most places, the minimum age is between 21 and 25. However, some rental companies may require drivers to be at least 25 years old to rent certain types of vehicles or impose a young driver surcharge for drivers under 25.

Typically, you will need a valid driver's license, a credit card in the renter's name for payment and deposit purposes, and a form of identification such as a passport or national ID card. It's advisable to check with the specific rental company for any additional requirements.

While credit cards are commonly used for car rentals, some rental companies accept debit cards or cash payments. However, they may require additional documentation or impose stricter rental conditions when a credit card is not used. It's best to contact the rental company directly to confirm their payment options.

Rental cars typically come with basic insurance coverage, such as collision damage waiver (CDW) or loss damage waiver (LDW), which limits your liability for damages to the car. However, this coverage often has deductibles or exclusions. You may have the option to purchase additional insurance or use your personal auto insurance, but it's important to check with your rental company and insurance provider for specific details.

In many countries, you can rent a car with a foreign driver's license as long as it is valid and written in a language recognizable by the rental company. However, an International Driving Permit (IDP) may be required in some cases. It's best to check with the rental company in the destination country for their specific requirements.

Crossing borders with a rental car is often allowed, but it depends on the rental company and the specific countries involved. Some companies may restrict cross-border travel or require additional documentation. Always inform the rental company in advance if you plan to travel across borders.

Returning a car late may result in additional charges. Rental companies typically have a grace period, but if you exceed it, you may be charged for extra hours or even an additional day. It's important to communicate any potential delays with the rental company to avoid unexpected fees.

Most rental companies allow you to cancel or modify your reservation, but there may be specific terms and conditions regarding cancellation fees and timeframes. It's recommended to review the rental company's policy before making a reservation and contact them directly if you need to make any changes.