Business writing varies from the conversational style often found in email messages to the more formal, legalistic style found in contracts. A style between these two extremes is appropriate for the majority of memos, emails, and letters. Writing that is too formal can alienate readers, and an attempt to be overly casual may come across as insincere or unprofessional. In business writing, as in all writing, you must know your audience.
Body: The body of the letter has three parts: an introduction that should explain who you are and why you are writing, a middle part that gives the details and persuades your reader to act, and a closing that tells your reader what action you expect or would like them to take. Valediction: (Left_aligned, two lines below the body) This is the line before your signature. For people whose name you don’t know, use “Faithfully yours” _ but avoid writing letters without finding out a name first.