Here is something
Visitors must have a ticket entering and leaving the country, the financial means to pay for their stay, and an address in the Dominican Republic where they will be staying.
from this website -
Visitors must have a ticket entering and leaving the country, the financial means to pay for their stay, and an address in the Dominican Republic where they will be staying.
from this website -
Dominican Republic International Travel Information
Dominican Republic international travel information and Travel Advisory
travel.state.gov