If you don't hold a driver's license issued in Puerto Rico, then you'll likely need to acquire an International Driving Permit (IDP) in your home country to be allowed to rent a car. You should also be aware that if you do need an IDP, it won't be valid on its own. You'll have to show your current license your passport and other forms of documentation as well. Lastly, it's important that the credit card used to book the rental matches the name on your driver's license and passport. Some additional requirements to rent a car internationally are:

• Age restrictions: You'll need to be 25 or over in most countries to rent a car. If you're younger, it might still be possible to rent a car but you'll have to pay a Young Driver's Surcharge. Additional restrictions may also apply to what kinds of cars you can rent.
• Driving limitations: Be sure to read the fine print before you drive away. With rental cars, you usually can't cross country borders, drive on ferries or on certain types of rugged terrain with your rental car.