Access National Agency Check with Inquiries

Definition
Access National Agency Check with Inquiries (ANACI) is

"[a] personnel security investigation for access to classified information conducted by the Office of Personnel Management (OPM), combining a national agency check and written inquiries to law enforcement agencies, former employers and supervisors, references, and schools, and a credit check."

Overview
"ANACIs are only conducted on civilian employees and do not apply to military or contractor personnel."