I-797C, also known as the Notice of Action, is a form issued by U.S. Citizenship and Immigration Services (USCIS) to communicate information regarding an immigration application or petition. It serves as a receipt notice, indicating that USCIS has received a petition or application and provides details such as the case number, filing date, and any scheduled appointments or actions required. Unlike other I-797 forms, I-797C does not grant any immigration status or benefits but is important for tracking the progress of a case.