With the simple scan of a pre-printed boarding pass or mobile device, verified passengers can immediately board their flight without need of an airline attendant.
Sometimes, if the fraudsters send pre-printed shipping labels to the victims, they also include a counterfeit check as payment for the re-shipper's services.
Sometimes the packaging process involves using pre-printed labels, making it impractical to write the "best before" date in a clearly visible location.
Before 1830, enumerators lacked pre-printed forms, and drew up their own, sometimes resulting in pages without headings, line tallies, or column totals.
Several marking schemes are in use, including a pre-printed multiple choice form, and a secret word posted at the control point that the competitor must copy down.