The process of bringing a ferret to Brazil from any place in the world need to starts with two different licenses: a license from IBAMA (Instituto Brasileiro do Meio Ambiente e dos Recursos Naturais Renováveis) and the second license is from the MINISTÉRIO DA AGRICULTURA authorizing to release the ferret at the airport.
IBAMA license:
Letter or/and license from the official breeder translated and validated and certified;
Certificate with the microchip number translated;
Official certificate issued by a recognized veterinarian clarifying that the animal is castrated and vaccinated against rabies, and translated to Portuguese;