off-paper
adv.— «Hood also pointed to a statement in Schmidt’s notes that “people know Stan Ford is a straight shooter and he turns away people who want to buy off-paper.” Schmitt agreed with Hood’s assertion that “off-paper” is a euphemism for buying a gun illegally.» —“Conflicting accounts in firefighter’s gun case” by Kevin Vaughan Rocky Mountain News (Denver, Colo.) Mar. 16, 2006. (source: Double-Tongued Dictionary)