Show your photographer which of the guests do not like to be pictured.
Suppose you throw in a little afterwork party, organize a company event, or inform clients in a seminar. Of course you want pictures! That is part of marketing, isn’t it. You want to use them on a blog post. Share them with the participants. Show off to journalists that you get famous guests. Put them on a facebook page for future reference.
Well, eh. You might not want to do that without asking permission nowadays. More and more people are really annoyed about the un-confirmed publishing of pictures. It’s not good marketing practice any longer to just move forward and publish-as-you-please. But then, you do not want to check all the pictures or the video real after the event, and make an inventory of all the permissions you need.
Here is your solution.