An I-797 Notice of Approval is a form used to communicate approval of applications or the issuance of benefits to applicants of petitioners of American immigration services, according to the U.S. Citizenship and Immigration Services. The form comes in seven variations.
The I-797 Notice of Action form is used to convey approval of an application or petition, while the I-797B Notice of Action form is used for approval of a petition for an alien worker, states the U.S. Citizenship and Immigration Services. The I-797C Notice of Action may be used for multiple purposes, including for issues of payment, application rejection, interviews and appointments. The I-797F Transportation Letter gives overseas applicants permission to travel in the United States.