U.S. Passport and Visa Number Entry
While most U.S. Passport numbers are nine digits and most U.S. visa numbers are eight digits, some are not. Last year, we implemented a workaround for entering document numbers that do not fit the usual pattern. That workaround is no longer necessary as we have implemented a permanent fix as part of our June 2011 upgrades.
What you need to know:
U.S. Passport numbers must be between six and nine alphanumeric characters (letters and numbers).
The “C” that precedes a U.S. Passport Card number is no longer case sensitive.
U.S.visa numbers must be exactly eight alphanumeric characters (letters and numbers). Entering a visa number is still optional though if an employee provides one, we encourage you to enter it, as doing so may prevent a tentative nonconfirmation (TNC).