This document provides tips for writing a formal letter. It recommends including the address and date in the top right corner of the letter. The recipient's name and address should be written on the left above the greeting. Proper greetings like "Dear..." and closings like "Yours faithfully" should be used. Formal language with expressions like "I would be grateful if..." is preferred over informal language. The letter should be divided into paragraphs. Examples of more and less formal expressions are provided to choose the proper tone for a formal letter.