Imperial passport of Kublai Khan “I am the emissary of the Khan. If you defy me, you die.” (This is one of two known passports).
—————————————————————
A paiza or paizi or gerege (Middle Mongolian: Гэрэгэ, Mongolian: Пайз, Persian: پایزه pāiza, Chinese: 牌子 páizi) was a tablet carried by Mongol officials and envoys to signify certain privileges and authority. They enabled Mongol nobles and officials to demand goods and services from civilian populations.
A not dissimilar thing is actually written on the inside of British passports