Learn how to write a formal letter in English with proper structure and format. Check its various types, tips, examples, and practice questions here. What is a formal letter , and how do you write one? Learn to write a polite formal letter with templates and tips to express yourself effectively. Learn how to write a formal letter in English with the correct format, structure and tone. See examples of different types of formal letters for various purposes and situations. To write a formal letter follow the below-given tips: Be concise in your letter. Write the reason for writing the letter in the first paragraph itself. Do not stretch the letter too much. Mention the address and date correctly. The closing of the letter should be with gratitude.