When writing a formal memo, one should include a heading, opening, context, task, summary and closing. The end of the memo should include any necessary attachments.
The heading segment of a memo simply includes who wrote the memo, along with his or her job title, and who the memo is to, including job title. It also includes the subject of the memo, which should be clearly outlined and the date of the memo.
The opening segment outlines the reason for the memo and the context should include the issue that the writer is resolving. The task segment explains what the memo's author did to solve the problem outlined in the context section.
Next, outline everything in the summary segment and write a brief closing segment. Make a list of any attachments that will accompany the memo.