Biometrics

#What this actually means

After you file most immigration applications, USCIS will schedule you for a biometrics appointment (sometimes called an "ASC appointment" — ASC stands for Application Support Center, which is the office where they do it). At the appointment, they'll take your fingerprints, photograph you, and have you sign a form.

This isn't optional. USCIS uses your biometrics to run FBI background checks, verify your identity, and produce your immigration documents (your photo ends up on your green card or work permit). The whole appointment takes about 15-20 minutes — it's genuinely one of the easiest steps in the process.

#What to expect

• You'll receive a biometrics appointment notice (Form I-797C) in the mail, usually 2-4 weeks after USCIS accepts your application.
• Bring the appointment notice, a valid photo ID (passport, driver's license, or green card), and your I-797 receipt notice.
• A technician will digitally scan all ten fingerprints, take your photo, and have you provide a signature.
• The results are sent directly to the FBI for a criminal background check. You don't need to do anything else.

#Key things to know

• If you can't make your scheduled date, you can usually walk in at the same ASC location on a different day. Just bring the appointment notice with you.
• Biometrics results expire after 15 months. If your case takes longer than that (it happens), USCIS may schedule you for a second appointment.
• USCIS has been reusing biometrics from previous applications more often in recent years, so not every new filing triggers a new appointment. You'll know if you need one because they'll send the notice.