Barcode on PO Print out

Hello fellow Oracle colleagues,

I would just like to ask if there was ever a chance that you had worked on a requirement where a bar code is printed on the Purchase Order print out. The purpose of this bar code requirement on the print out is that they'd want to ensure the authenticity of the print out.

If you have worked on a similar requirement before, I appreciate if you can share how you were able to implement it - does it require a new tool apart from Oracle Purchasing? Just a customized program? Or does Oracle have built-in barcode generator and print functionality?