Most car rental companies in San Juan require a credit card for renting a car. This is because they typically use credit cards for security purposes and as a guarantee for any potential damages or additional fees.

To rent a car in San Juan, you will typically need the following documents:

• A valid driver's license from your home country or an International Driving Permit (IDP)
• A valid passport or identification card
• A valid credit card in the name of the primary driver

It's always a good idea to check with the specific car rental company for their document requirements.

Yes, most car rental companies in San Juan require you to have insurance coverage when renting a car. You can either purchase the rental car company's insurance or use your own personal car insurance policy if it covers rental cars. It's important to verify the insurance requirements with the specific car rental company.

The cancellation policy for car rentals in San Juan can vary depending on the car rental company. It's important to check the terms and conditions or contact the car rental company directly for their specific cancellation policy. Some companies may offer free cancellation up to a certain period before the pick-up time, while others may charge a cancellation fee.

While some car rental companies in San Juan may accept debit cards, many prefer credit cards. Debit cards may have limitations or additional requirements, such as a higher security deposit. It's best to check with the specific car rental company for their payment options and requirements.

Some car rental companies in San Juan may have a minimum age requirement of 25 years old. However, there are also car rental companies that may allow drivers between 21 and 24 years old to rent a car, but with an additional young driver surcharge. It's recommended to check with the specific car rental company for their age policy.