as i recall the certi-card program, it was a chrysler factory program used to track warranty work. the car was issued to the original purchaser of the car and when the car owner brought the car in for warranty work, the service dept. would run the card through an inked "roller" device that printed all the information stamped on the card directly onto the service order. the roller device looked like the original credit card mechanical printer that stores used to use. this card was suppose to track warranty work and ensure that only the original owner who was eligible for warranty repairs got the warranty credit.
i believe chrysler used the certi-card system through the end of the 1980's at which time more and more auto repair and warranty work were being tracked on computers.