Passports are the standard government issued identification documents used for international travel.  A passport card is a more low cost and low tech alternative to a regular passport which is still valid for visa-free travel to a limited number of countries.  Passport cards typically contain less security features than regular passports, and are not valid for official government travel requiring advanced security clearance.
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Passports are a form of official government-issued travel document issued to citizens of each country, which is required for international travel. Passport cards are a simplified version of passports designed for citizens of some countries, including the US.  Passport cards do not contain biographical information or a photograph, and usually only include basic information such as the bearer’s name and nationality.
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What is the difference between a passport and a passport card?
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