A strong briefing include areas to focus on and topics that are sensitive is usually enough to ensure a professional speaker will deliver.  Most speakers should be comfortable providing an outline review and a couple of sample slides. This is usually more effective than line-by-line slide approval.

Speakers that work with their clients to tailor the keynote to the needs of the event will frequently continue to refine their content and delivery until surprisingly close to the event. Research continues, lessons from their other presentations about what audiences do or don’t engage with, new technology or articles appear on the seen – this often leads to the latest in thinking appearing in the keynote and the presentation.

If clients have a regulatory, legal, or compliance driven need to review slides then this should be raised with the speaker prior to entering into a formal agreement.