All radio units that Infotainment.com ships out that are for the FCA group (Dodge, Jeep, Chrysler, RAM) will include a card that states the 4 digit anti-theft code, as well as a 1 inch sticker with the 4 digit code that is on the radio unit.
If the card is missing or lost, please inspect the radio module for the 1 inch sticker with the 4 digit code.