Receipt Number

A 13-character alphanumeric code (e.g., EAC-XX-XXX-XXXXX) assigned by USCIS to track an application or petition. The receipt number appears on Form I-797C (Notice of Action) and is used to check case status online at egov.uscis.gov. The three-letter prefix identifies the service center processing the case (e.g., EAC = Vermont, LIN = Nebraska, SRC = Texas, WAC = California).