How is my enhanced driver's license or state ID card used when I cross the border?
Your enhanced license or state ID card has a Radio Frequency Identification (RFID) chip that contains a unique reference number. The unique reference number allows the U.S. Customs and Border Protection officials to quickly and accurately verify your identity and citizenship.
When you enter the U.S. at a land or sea port that has an RFID reader, your RFID number will be referenced against a secure database to verify your identity for border-crossing purposes. There is no personally identifying information stored on the RFID chip. The Customs and Border Protection official may also physically inspect your enhanced license or ID, ask for additional information, or perform additional inspections.
Not every port of entry will have an RFID reader. If your port of entry does not use an RFID reader, the Customs and Border Protection official may inspect your enhanced license or ID or use other means to confirm your identity and citizenship.
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