I have just come across a couple websites (NOT official govt. sites) that claim that Dogos (and several other breeds) cannot be brought into Poland!!
I found those too.
Unless I have misunderstood this, the only form that I found should be signed by a vet when completed, as it serves only as a veterinary certificate stating that the animal has been vaccinated against rabies etc, and is not an import form.
Regulation EC No. 998/2003
From what I have found from reading up on this regulation, it lays down the animal health requirements for the movement of non-commercial pet animals.
It is not concerned with laws on importation of certain breeds of dogs.