you might thank the writer for purchasing your product or for being a loyal customer or client.

Unlike the general information memo, a directive generally starts with the rationale behind the directive so that people feel that it is a reasonable request, and also to help people remember it. It then ends by stating the policy or procedure that readers are directed to follow. For example, let's say that for security reasons, the janitorial staff will no longer be allowed access to employee offices. Instead, employees will put their trash cans outside their offices on Mondays, Wednesdays, and Fridays for the janitorial staff to empty. Employees will then put their trash cans back in their offices the following morning. This is a new practice, so you want to issue a directive.