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).
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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.
that happened once. Then their empire was conquered and their cities burned in one of the bloodiest wars in history