what is passport card
Help - U.S. Passport and Passport Card Number. The U.S. Department of State issues U.S. Passports and Passport Cards to U.S. citizens and nationals. The U.S. Passport Card is a wallet-size card that can be used only for land and sea travel between the United States and Canada, Mexico, the Caribbean and Bermuda. Enter the U.S. Passport or Passport Card number exactly as it appears on the document.