Most of the readers who come here know of Epiq Systems because of the eDiscovery component in its wide-ranging work. Epiq is involved also in large corporate bankruptcy cases, in class actions and in other fields apart from pure discovery.
Its website is carrying a series by Kyle Bingham called Media Planning 101 for Lawyers, consisting of Television, Part I and Television Part 2, together with one called Online Impressions. They are all about notifications, principally in relation to class actions, and aim to tell lawyers how they can most effectively, and cost-effectively, bring notifications to people, not all of whom are identifiable.
Reading the articles, it becomes clear that many of the points made in them have wider application than to class-action notifications. Cybersecurity breaches give another example of matters which must be brought to the attention of a wide range of people.