In numerous situations where someone is applying for a green card, naturalizaiton, or other U.S. immigration benefit, U.S. Citizenship and Immigration Services (USCIS) will require you to submit a fee for "biometrics." It will then, usually a few weeks before you attend the interview at which your application is decided upon (if an interview is required), call you in for your biometrics appointment.
Even people who already have a green card, but are applying for a renewal after the card itself expires, must get biometrics done.
In most cases, USCIS will require that you attend your biometrics appointment at a USCIS-authorized "Application Support Center." For a list of ASCs, see the USCIS Service and Office Locator. In some nonurban areas of the United States, USCIS also offers mobile biometrics vans.
If you cannot make it at the scheduled time, you can ask to be rescheduled.
What Happens at a Biometrics Appointment?
In scientific terms, "biometrics is" means anatomical or physiological data by which a person can be uniquely identified. At your biometrics appointment, USCIS will most likely collect your fingerprints, take your photo, and have you sign your name for electronic capture.
The actual process takes about 20 minutes, though you may have to wait a while after you arrive. A number of people will have received the exact same appointment time as you did. Everyone who was given the same appointment time will be called in on a first-come, first-served basis. Once you arrive at the ASC, you be given a number showing your place in line.
At the end of the biometrics appointment, you will be given a stamp on your appointment notice confirming that you attended. Keep this document safe, in case you are later asked for it or USCIS cannot find its record stating that you indeed came to the appointment.
By the way, if you have questions about your case -- such as when you are likely to be called in for an interview -- this is not the place to ask them. The people who collect biometrics do not have access to your file, and cannot give you advice or information about your case.
Your fingerprints will be sent on for review by the U.S. Federal Bureau of Investigation (FBI), which will check them against records held by the police as well as by USCIS (which often takes the fingerprints of people caught crossing the border illegally). The FBI will send a report to USCIS to confirm your identity and to show whether you have committed any crimes or immigration violations that might make you inadmissible, deportable, or otherwise ineligible for the benefit that you seek.
What If You Have a Criminal Record?
If you think you might have a criminal record but are not sure, consult a lawyer. Some -- but not all -- crimes make you ineligible for immigration benefits. You won’t discover until you get to your interview what the FBI report says about you. The lawyer can help you request a separate fingerprint report from the FBI and deal with whatever it shows, to help you get your green card, citizenship, or other benefit.