The Portuguese Identity Card (Cartão de Cidadão) is the official identification document for citizens. It includes personal details, a photo, and biometric data, serving as proof of identity and nationality. This card is required for accessing public services, traveling within the EU, and various legal purposes. To obtain one, citizens must apply at civil registry offices or consulates. Renewals and updates are essential to keep information current. Carrying a valid identity card is mandatory for all Portuguese residents.  identity card portugal