feeder document
n.— «Al Omari, on board American Airlines Flight 11, and Alghamdi, who boarded United Airlines Flight 175, used the residency certificates, known to agents as “feeder documents,” to get valid Virginia driver’s licenses and ID cards.» —“Authorities fight document fraud as terror threat” by Sara A. Carter Daily Bulletin (Ontario, California) July 3, 2006. (source: Double-Tongued Dictionary)