You need to mention that this document is a memorandum at the outset. Fortunately, memo writing is not as hard as it looks. In the notice board you may find several notices of which others are usually, meant for motivations purposes, so it is the format that will distinguish your memo from other notices. It is important to understand the correct memo format to convey your message professionally. Candidates in examinations such as SSC exam, Bank exam, RRB exam, or other Government exams. A professional memo is an effective tool of communication within organizations and is used to spread the information or for a call to action. A memo is usually a page or two long, single spaced and left justified. To write a memorandum in APA format, write a header, opening, summary or discussion, and closing segment following the general guidelines for business writing. When composing a memo, always take the four-step approach to writing: plan what you want to say, write a draft, revise the draft, and edit. There is no one-size-fits-all when it comes to writing memos, but most companies use a similar format.