How do I address a business memo?

I need to write a business memo to a powerful person in my corporation, how should I address the memo?

Heading Segment

Begin the memo with a heading segment, following this format: (centred and bold heading) MEMORANDUM
TO: (readers' names and job titles)
FROM: (your name and job title)
DATE:
SUBJECT: (specifically what the memo is about)

Make sure you address the reader by her or his correct name and job title. Courtesy titles are not necessary but make sure you spell everyone's names properly and don't use informal nicknames.

Use a job title after your name, and hand write your initials by your name. This confirms that you take responsibility for the contents of the memo.

Be specific and concise in your subject line. For example, "computers" could mean anything from a new purchase of computers to a mandatory software class for employees. Instead use something like, "Turning computers off at Night." This also makes filing and retrieving the memo easy