Passport with a minimum validity of six (6) months. All passengers are required to fill out an E-Ticket or paper form when entering or exiting the Dominican Republic.Electronic ticket for entry and exit to the Dominican Republic. Now you can record your entry and exit data digitally. Prepare your travel ID or any documentation you need ahead of time, including passport, visa, ESTA and more. The Department of Homeland Security recommends filling out the form at least 3 days before traveling. You need a ticket (in theory could be bus or ferry ticket) that shows you are leaving the region that is considered included in the count for having an ESTA.