USCIS uses numerous types of Form I-797 to communicate with customers or convey an immigration benefit. Form I-797 is NOT a form you can fill out. The chart below gives a brief description of each:
Form Number Description
I-797, Notice of Action Issued when an application or petition is approved.
I-797A Notice of Action Issued to an applicant as a replacement Form I-94.
I-797B Notice of Action Issued for approval of an alien worker petition.
I-797C Notice of Action Issued to communicate receipt of payments rejection of
applications transfer of files fingerprint biometric interview
and re-scheduled appointments and re-open cases.
I-797D Accompanies benefit cards.
I-797E Notice of Action Issued to request evidence.
I-797F Transportation Letter Issued overseas to allow applicants to travel.