A biometrics appointment is an official security procedure that verifies the identity of the applicant, and assesses their criminal background and any previous immigration violations. If you are required to provide biometrics, you will receive a USCIS biometrics appointment notice, Form I-797C, Notice of Action. The notice will include the date, time, and location of your appointment. At your appointment, officials will take your fingerprints, along with your photograph. The USCIS will also require you to provide your signature