In 1961 Colombia released a set of stamps to honor a nurse who died in the autumn floods of 1955.
These were not semi-postals, but postal tax stamps. And in this case, the tax was mandatory.
All mail in Colombia was supposed to include these stamps during the month of November, 1961. They depicted a Red Cross nurse, Manuelita de la Cruz, who lost her life while helping flood victims.
Colombia issued its first Red Cross postal tax stamp in 1935. The practice came to an end in 1965.
