Be aware that AVIS car rental at Punta Cana Airport will make you leave a $ US1500.00 deposit to let you use your Collision Damage Waiver ( CDW) through your Chase credit card. They refer to it as Loss Damage Waiver. Although it is stated on the AVIS web site that you can use CDW the actual situation on the ground is very different. The charge for the Loss Damage Waiver that you have to pay is $ US 30.99 a day, so you can see why they would want you to pay this as using your credit cards CDW coverage would lose them $US 185.94 on a six day rental.
I would also inspect the cars condition very carefully including the light covers as they tried to charge me for damage ( cracked light) that was clearly a lot older than I had the car for. The car in question was a grey Kia Sportage. The inspection when you hire the car was a lot quicker than when you return the car.