In the part of the company that I’m in, my group is mainly responsible for heading DR’s and sending out the required documentations for the respective parties to review. In my and other co-worker’s experience, sometimes the best you can do is send documents in a timely manner (at least a week before the DR) for the parties to review. Whether or not the person will read it before the DR is another matter, of which the responsibility falls on the person. In agreeing to be part of the DR, the person is agreeing that they have the capacity and ability to review all documents and provide support in pointing out errors or potential pitfalls. If they are not able to do this by reviewing the material, then they should be delegating their responsibility to another person. I’ve seen people assign backups to read the material as well in the case that they don’t have the time to read or get double booked on the DR time slot. Other times, I’ve seen people review the DR docs as the DR is happening (which ideally should not happen) but still are able to provide the needed feedback. So yes, sending the docs at least a week ahead is the best option as these people have opted in to taking this responsibility. Sending daily reminders or other measures like that to make sure people read docs will likely be taken as annoying and even offensive to some and would work against you. If problems arise where someone is not reviewing their docs, then it is up to the PM or the party responsible for the DR to reassign the role and get the proper review done.