Goofy paperwork. The '68 model year production had already ended on 7/27/68, and order acceptance was cut off in May. Dealers didn't know the VIN of an ordered car until a couple of days after it was shipped, when they got the MSO and Copy 7 of the order in the mail. That yellow thing isn't a GM order form - it's a dealer-provided acknowledgement form (note the "Reynolds & Reynolds" on the bottom), which appears to have been "created" VERY recently (and poorly).