Creating a Business Card for Witness?

My witness is a School Principal who seems to have his own personal phone number that isn't a mobile number but he doesn't have a business card. Would I be able to create one and just put it in my application for my passport. Also, just double checking that he would also be able to verify my Drivers License as identification for my application as a certified copy. Please let me know if anyone else has done this or how you went about it!