Comment by usr1106

That's not fully correct. The West accepted only a single German citizenship. So everyone from East Germany could immediately be issued a "German" passport by the Western authorities.

For the East there were 2 citizenships. They had no adjectives, they only talked about "citizen of the German Democratic Republic" and "citizen of the Federal Republic of Germany".

The occupation view was not official politics after 1970. The West had recognized the East as a state. But citizens of both states were assumed to have the same citizenship.

Edit: recognized as state should maybe recognized as some kind of state. Like the citizenship there were numerous differences compared to other foreign nation states.