I think your best bet of writing to Castro (if you in the US) would be to befriend someone who works at a Cuban embassy in Another Country and personally ask them if they could deliver it.
Fidel Castro's brother is Ra
Fulgencio Batista .
Fidel Castro does not have a wife.
No, Fidel Castro is from Cuba.
No, Fidel Castro is not single.
Fidel Castro is an atheist.
Fidel Castro.
Fidel Castro is an atheist.
Fidel Castro's brother is Ra
Yes, Fidel Castro died on November 25, 2016
Fidel Castro was born on August 13, 1926
Yes, Fidel Castro has 9 kids.