Buy a Portuguese National ID card produced with the same quality as the original document. The Citizen Card (Portuguese: Cartão de cidadão) is an identity card issued by the Portuguese government to its citizens. The card replaces several previous documents, including the Bilhete de Identidade (BI; Identity Card), Social Security card, National Health Service card, Taxpayer card, and voter registration card in one secure card. The Citizen card is a valid travel document within all European countries.