What does the header of an official memorandum include?

• A. The date and subject line.
• B. Two or three lines with organization and address, printed on official letterhead.
• C. A summary of the memo contents.
• D. The signature block at top.

Answer: (B)

The header identifies the issuing office in a formal, official way. In an official memorandum, this is shown on the organization’s official letterhead, typically two or three lines with the organization and address. This letterhead conveys the document’s authority and source before the body begins. A date or subject line may appear as part of the header, but the defining feature is the official letterhead itself that signals who sent the memo. The signature block sits at the bottom, not the top, and a memo summary belongs elsewhere, not in the header.