The World War II international usages of this series are varied. Several types of censorship were used depending on the stage of the war, and the destination country. The early British censorship covers have a paper seal. The cover below is an example. It is addressed to Yorkshire and bears singles of the 20cLC, 50 centavos, and 1 Peso. I show a detail of the 20cLC. Below this cover, I show other examples of censorship.

Below is a cover showing Brazilian censorship reading "ABERTA PELA CENSURA," and with a small marking identifying the reader as R.S. 712. The cover bears a 30 centavos specimen, of which I show a detailed image below.