Masthead from a current publication listing you as an editorial contributor.
A recent article (or link) with your by-line.
Letter from the editor/producer on station/network letterhead or from a company email address that states you are covering NAB Show on assignment.
Government-issued or media outlet press ID.
A news outlet webpage listing you as news staff (news director, editor, producer, reporter, anchor).
Business card from your media outlet reflecting your editorial role.
Recent article with your byline.
Recent/relevant article quoting you as an industry analyst.
Cover of a recent market research report listing you as a contributor (report must not be solicited by an exhibiting company).