Can I have bar codes on my cards?

Yes.
IDs Now supports Code 39 and Code 128 bar codes. Bar codes may be printed on a white background or on a colored background (such as red or black) to eliminate photocopying. Bar codes may be generated from field designated as the bar code, a different field such as an employee number, or more than one field joined together. We always recommend testing a few cards for readability before final production of cards.