CD Baby does not require that your UPC bar code be printed on your packaging. CD Baby only requires that a valid UPC bar code be assigned to your album in their system.
A UPC bar code can be added to your manufacturing order for $20. If you have not purchased (or supplied) a UPC bar code during the manufacturing process, you will be prompted to purchase a UPC bar code during your account setup with CD Baby. CD Baby charges $20 for a UPC bar code.