All passengers are required to fill out an E-Ticket or paper form when entering or exiting the Dominican Republic. Passport with a minimum validity of six (6) months.Air, maritime or land ticket of entrance and return. Electronic ticket for entry and exit to the Dominican Republic. Now you can record your entry and exit data digitally. Below are the most frequently asked questions about travel to the Dominican Republic, to help ease your journey just a little more. 8. Every time I travel to the Dominican Republic, do I have to do this? Yes, the form must be filled out for each trip. The Immunization Program offers advice for travelers about vaccines, including immunization requirements and recommendations for travel to specific countries. Allegiant offers the cheapest airfare with flights to over 100 US airports.