A Practice Note discussing when to submit a white paper in an antitrust matter, including to prevent or narrow the scope of a Second Request. This Practice Note discusses the risks and benefits of submitting a white paper, provides tips on drafting and submitting white papers, including both formal and informal white papers, and advice on presenting the white paper to the antitrust agencies, including who to bring to a meeting with the FTC or DOJ and how to prepare for the meeting.