The Direccion General de Migracion's passport department issues passports to Dominicans. The director of the Migration Department is Carlos Amarante. They have a website at
http://www.migracion/gov.do and list
despacho.gral@verizon.net.do as their email address. Try emailing them, but I would also recommend that you contact them by telephone, though, which could be more productive than waiting for them to respond via email. See
http://www.migracion.gov.do/contactos.htm
The direct contact details for the Department of Passports, a division within Migration are:
Dirección General de Pasaportes
Av. 30 de Mayo esq. Héroes de Luperón
Santo Domingo, República Dominicana
Tel.: (809) 532-7373
We do not have a direct email for them.
But if you call them, they can give you answers to your specific questions.