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National Seal of Brazil. The National Seal of Brazil is one of Brazil's national symbols, displayed on several official documents, such as graduation diplomas, consular and diplomatic papers, military conscription forms, etc. The design of the National Seal is also represented on the reverse side of the Great Seal of the Arms of the Federative Republic of Brazil (that bears the image of the country's coat of arms on the obverse side), and is used by the Presidency of the Republic to authenticate solemn documents together with the President's signature, such as instruments of ratification of international treaties.