A Memorandum (abbreviate: memo) is a message, It is used for communicating within an organization or a company such as informing about specifc issue, event, policy, resources and etc. The memo is usually short and concise message. It is easy way to communicate. We can type or handwritten. Normally, a memo has both official and informal forms. It depends on the organizations, or companies use. The most memo form including; to, from, date, subject, and message section. It is not necessary signed. But it should put the sender's name at the end of the message, The memo forms as below: